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fix(compiler): use file system polling events in watch mode (stencil v2) #4147

Merged
merged 1 commit into from
Mar 14, 2023
Merged

fix(compiler): use file system polling events in watch mode (stencil v2) #4147

merged 1 commit into from
Mar 14, 2023

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rwaskiewicz
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@rwaskiewicz rwaskiewicz commented Mar 10, 2023 •
edited
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Pull request checklist

Please check if your PR fulfills the following requirements:

  • Tests for the changes have been added (for bug fixes / features)
  • Docs have been reviewed and added / updated if needed (for bug fixes / features)
  • Build (npm run build) was run locally and any changes were pushed
  • Unit tests (npm test) were run locally and passed
  • E2E Tests (npm run test.karma.prod) were run locally and passed
  • Prettier (npm run prettier) was run locally and passed

Pull request type

Please check the type of change your PR introduces:

  • Bugfix
  • Feature
  • Refactoring (no functional changes, no api changes)
  • Build related changes
  • Documentation content changes
  • Other (please describe):

What is the current behavior?

the fs-event based file watcher that was shipped in typescript 4.9 does not play nicely with stencil in some cases. we've received error reports of the dev server:

  • reloading as a result of continuous recompilation
  • not reloading/recompiling projects on file changes
  • crashing when files are removed

GitHub Issue Numbers:

What is the new behavior?

this commit updates stencil to use the polling-based file watcher that was used prior to the typescript 4.9 upgrade. in ts 4.9, the ts compiler was updated to use filesystem events. since then, we've received reports of fs events not playing nicely with certain development environments. for this reason, we revert back to the polling based implementation.

Does this introduce a breaking change?

  • Yes
  • No

Testing

  • Checkout this branch and build it (npm run clean && npm ci && npm run build && npm pack). This generates a tarball in the root of the Stencil repo, which'll be used throughout testing
  • For each of the issues listed above, install the tarball (npm i [PATH_TO_TARBALL]) in the reproduction case, follow the steps provided therein
  • Note: Tested with the Stencil team on Friday, Mar 10 in group Stencil Alignment Session

Other information

@rwaskiewicz rwaskiewicz changed the title fix(compiler): use file system polling events in watch mode fix(compiler): use file system polling events in watch mode (stencil v2) Mar 10, 2023
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github-actions bot commented Mar 10, 2023 •
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--strictNullChecks error report

Typechecking with --strictNullChecks resulted in 2125 errors on this branch.

Unfortunately, it looks like that's an increase of 25 over main 😞.

Violations Not on `main` (may be more than the count above)
Path Location Error Message
src/cli/run.ts (50, 55) TS2322 Type 'string | null | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/cli/run.ts (56, 37) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/cli/run.ts (103, 11) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/cli/run.ts (157, 63) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts (169, 47) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts (184, 63) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts (185, 14) TS18048 'config.sys' is possibly 'undefined'.
src/cli/task-info.ts (10, 50) TS18048 'details' is possibly 'undefined'.
src/cli/task-info.ts (10, 71) TS18048 'details' is possibly 'undefined'.
src/cli/task-info.ts (12, 40) TS18048 'details' is possibly 'undefined'.
src/client/client-patch-browser.ts (47, 43) TS18049 'scriptElm' is possibly 'null' or 'undefined'.
src/client/client-patch-browser.ts (67, 15) TS18049 'scriptElm' is possibly 'null' or 'undefined'.
src/client/client-patch-browser.ts (67, 63) TS18049 'scriptElm' is possibly 'null' or 'undefined'.
src/client/client-patch-browser.ts (70, 45) TS2345 Argument of type 'HTMLScriptElement | null | undefined' is not assignable to parameter of type 'HTMLScriptElement'. Type 'undefined' is not assignable to type 'HTMLScriptElement'.
src/client/client-window.ts (41, 5) TS2769 No overload matches this call. Overload 1 of 2, '(type: keyof DocumentEventMap, listener: (this: Document, ev: PointerEvent | MouseEvent | UIEvent | Event | ErrorEvent | ... 13 more ... | WheelEvent) => any, options?: boolean | ... 1 more ... | undefined): void', gave the following error. Argument of type '"e"' is not assignable to parameter of type 'keyof DocumentEventMap'. Overload 2 of 2, '(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions | undefined): void', gave the following error. Argument of type 'null' is not assignable to parameter of type 'EventListenerOrEventListenerObject'.
src/client/polyfills/css-shim/css-parser.ts (60, 24) TS2531 Object is possibly 'null'.
src/client/polyfills/css-shim/css-parser.ts (60, 35) TS2531 Object is possibly 'null'.
src/client/polyfills/css-shim/css-parser.ts (65, 7) TS2531 Object is possibly 'null'.
src/client/polyfills/css-shim/scope.ts (22, 24) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/scope.ts (33, 7) TS18048 'scope.styleEl' is possibly 'undefined'.
src/client/polyfills/css-shim/scope.ts (40, 64) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/client/polyfills/css-shim/scope.ts (46, 44) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/client/polyfills/css-shim/selectors.ts (129, 5) TS2322 Type 'HTMLElement | null' is not assignable to type 'HTMLElement'. Type 'null' is not assignable to type 'HTMLElement'.
src/client/polyfills/css-shim/test/compiler.spec.ts (20, 14) TS18047 'var1' is possibly 'null'.
src/client/polyfills/css-shim/test/compiler.spec.ts (28, 14) TS18047 'var1' is possibly 'null'.
src/client/polyfills/css-shim/test/compiler.spec.ts (36, 14) TS18047 'var1' is possibly 'null'.
src/client/polyfills/css-shim/test/compiler.spec.ts (44, 14) TS18047 'var1' is possibly 'null'.
src/client/polyfills/css-shim/test/compiler.spec.ts (51, 14) TS18047 'var1' is possibly 'null'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (28, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (54, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (77, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (101, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (122, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (145, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (169, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (189, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (210, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (234, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (257, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (280, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (306, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (333, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/test/css-shim.spec.ts (364, 16) TS2345 Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
src/client/polyfills/css-shim/utils.ts (7, 28) TS2532 Object is possibly 'undefined'.
src/compiler/app-core/app-data.ts (152, 25) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-data.ts (153, 63) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-data.ts (154, 16) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-data.ts (155, 34) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-data.ts (156, 22) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-data.ts (157, 21) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/app-core/app-polyfills.ts (22, 7) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/build/build-stats.ts (89, 24) TS18048 'config.outputTargets' is possibly 'undefined'.
src/compiler/build/build-stats.ts (93, 28) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/build/build-stats.ts (93, 49) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/build/build-stats.ts (96, 9) TS18048 'config.logger' is possibly 'undefined'.
src/compiler/build/build-stats.ts (177, 38) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/build/build-stats.ts (178, 15) TS18048 'c.moduleFiles' is possibly 'undefined'.
src/compiler/build/build-stats.ts (182, 11) TS18048 'a.name' is possibly 'undefined'.
src/compiler/build/build-stats.ts (182, 20) TS18048 'b.name' is possibly 'undefined'.
src/compiler/build/build-stats.ts (189, 10) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/build/build-stats.ts (189, 35) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/build/build-stats.ts (189, 68) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/bundle/bundle-output.ts (101, 67) TS2345 Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'.
src/compiler/bundle/bundle-output.ts (102, 52) TS2345 Argument of type 'BuildConditionals | undefined' is not assignable to parameter of type 'BuildConditionals'. Type 'undefined' is not assignable to type 'BuildConditionals'.
src/compiler/bundle/bundle-output.ts (152, 24) TS18048 'config.rollupConfig' is possibly 'undefined'.
src/compiler/bundle/bundle-output.ts (152, 24) TS18048 'config.rollupConfig.inputOptions' is possibly 'undefined'.
src/compiler/bundle/core-resolve-plugin.ts (135, 11) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/bundle/core-resolve-plugin.ts (146, 7) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/bundle/core-resolve-plugin.ts (147, 9) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/config/test/validate-config.spec.ts (370, 12) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts (372, 12) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts (375, 12) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts (378, 12) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/config/transpile-options.ts (56, 71) TS2345 Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'.
src/compiler/config/transpile-options.ts (62, 47) TS2345 Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'.
src/compiler/config/transpile-options.ts (110, 5) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/config/transpile-options.ts (113, 5) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/entries/component-bundles.ts (36, 11) TS18048 'cmp.dependents' is possibly 'undefined'.
src/compiler/entries/component-bundles.ts (55, 78) TS18048 'cmp.dependents' is possibly 'undefined'.
src/compiler/entries/component-bundles.ts (131, 7) TS18048 'cmp.dependents' is possibly 'undefined'.
src/compiler/optimize/minify-js.ts (103, 5) TS18048 'd.lines' is possibly 'undefined'.
src/compiler/optimize/minify-js.ts (119, 7) TS18048 'd.lines' is possibly 'undefined'.
src/compiler/optimize/minify-js.ts (131, 7) TS18048 'd.lines' is possibly 'undefined'.
src/compiler/optimize/optimize-module.ts (131, 17) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/optimize/optimize-module.ts (137, 17) TS18048 'opts.format' is possibly 'undefined'.
src/compiler/optimize/optimize-module.ts (152, 17) TS18048 'opts.format' is possibly 'undefined'.
src/compiler/optimize/optimize-module.ts (167, 5) TS18048 'opts.format' is possibly 'undefined'.
src/compiler/optimize/optimize-module.ts (193, 5) TS2322 Type 'null' is not assignable to type 'SourceMap | undefined'.
src/compiler/output-targets/dist-custom-elements-bundle/custom-elements-bundle-types.ts (29, 38) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-custom-elements-bundle/custom-elements-bundle-types.ts (30, 39) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-custom-elements-bundle/custom-elements-bundle-types.ts (76, 33) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-custom-elements/custom-elements-types.ts (66, 47) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-custom-elements/custom-elements-types.ts (103, 33) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-lazy/generate-esm-browser.ts (27, 9) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/output-targets/dist-lazy/generate-esm-browser.ts (29, 64) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/dist-lazy/generate-esm-browser.ts (40, 9) TS2345 Argument of type '(string | undefined)[]' is not assignable to parameter of type 'string[]'.
src/compiler/output-targets/dist-lazy/lazy-build-conditionals.ts (13, 22) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/output-targets/dist-lazy/lazy-build-conditionals.ts (14, 28) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/output-targets/dist-lazy/lazy-build-conditionals.ts (17, 30) TS18048 'config.extras' is possibly 'undefined'.
src/compiler/output-targets/index.ts (34, 53) TS2345 Argument of type '(Module | undefined)[]' is not assignable to parameter of type 'Module[]'. Type 'Module | undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'Module'.
src/compiler/output-targets/index.ts (56, 9) TS2322 Type 'null' is not assignable to type 'string'.
src/compiler/output-targets/output-angular.ts (52, 32) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/output-angular.ts (54, 45) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/output-angular.ts (74, 35) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/output-angular.ts (160, 38) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/output-angular.ts (174, 70) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/output-targets/test/output-targets-dist-custom-elements.spec.ts (150, 14) TS18048 'bundleOptions.loader' is possibly 'undefined'.
src/compiler/output-targets/test/output-targets-dist-custom-elements.spec.ts (176, 14) TS18048 'bundleOptions.loader' is possibly 'undefined'.
src/compiler/style/css-parser/parse-css.ts (55, 7) TS18048 'd.lines' is possibly 'undefined'.
src/compiler/style/css-parser/parse-css.ts (67, 7) TS18048 'd.lines' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts (30, 35) TS2454 Variable 'compilerExe' is used before being assigned.
src/compiler/sys/typescript/typescript-resolve-module.ts (52, 75) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/compiler/sys/typescript/typescript-resolve-module.ts (80, 24) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts (87, 5) TS18048 'config.logger' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts (104, 7) TS2322 Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'.
src/compiler/sys/typescript/typescript-resolve-module.ts (142, 11) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts (143, 13) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-resolve-module.ts (171, 11) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-resolve-module.ts (179, 3) TS2322 Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'.
src/compiler/sys/typescript/typescript-sys.ts (114, 9) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-sys.ts (119, 9) TS18048 'config.logger' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (133, 21) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (133, 21) TS18048 'compilerSystem.watchDirectory' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (148, 21) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (148, 21) TS18048 'compilerSystem.watchFile' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (208, 24) TS18048 'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (209, 7) TS2322 Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-sys.ts (225, 5) TS18048 'results' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts (225, 25) TS18048 'results' is possibly 'undefined'.
src/compiler/transformers/decorators-to-static/component-decorator.ts (118, 27) TS2345 Argument of type 'Symbol | undefined' is not assignable to parameter of type 'Symbol'. Type 'undefined' is not assignable to type 'Symbol'.
src/compiler/transformers/decorators-to-static/component-decorator.ts (120, 43) TS18048 'cmpNode.name' is possibly 'undefined'.
src/compiler/transformers/decorators-to-static/component-decorator.ts (127, 77) TS18048 'symbol.declarations' is possibly 'undefined'.
src/compiler/transformers/test/transpile.ts (63, 20) TS2345 Argument of type 'Config | null | undefined' is not assignable to parameter of type 'Config'. Type 'undefined' is not assignable to type 'Config'.
src/compiler/transformers/test/transpile.ts (63, 51) TS18048 'tsSourceFiles' is possibly 'undefined'.
src/compiler/transformers/test/transpile.ts (102, 73) TS2345 Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transformers/test/transpile.ts (107, 10) TS2454 Variable 'outputText' is used before being assigned.
src/compiler/transformers/test/transpile.ts (108, 18) TS2454 Variable 'outputText' is used before being assigned.
src/compiler/transformers/test/transpile.ts (132, 5) TS2454 Variable 'outputText' is used before being assigned.
src/compiler/transformers/transform-utils.ts (659, 58) TS2345 Argument of type 'Declaration | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'.
src/compiler/transpile/run-program.ts (39, 51) TS18048 'tsSourceFiles' is possibly 'undefined'.
src/compiler/transpile/run-program.ts (39, 104) TS2345 Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transpile/run-program.ts (41, 40) TS18048 'tsSourceFiles' is possibly 'undefined'.
src/compiler/transpile/run-program.ts (88, 47) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts (48, 5) TS2322 Type 'null' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts (51, 5) TS2322 Type 'null' is not assignable to type 'Module'.
src/compiler/transpile/transpile-module.ts (79, 65) TS2345 Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'. Type 'undefined' is not assignable to type 'ScriptTarget | CreateSourceFileOptions'.
src/compiler/transpile/transpile-module.ts (84, 56) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts (98, 73) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts (108, 69) TS2345 Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transpile/transpile-module.ts (128, 24) TS2345 Argument of type 'Diagnostic' is not assignable to parameter of type 'DiagnosticWithLocation'. Types of property 'file' are incompatible. Type 'SourceFile | undefined' is not assignable to type 'SourceFile'. Type 'undefined' is not assignable to type 'SourceFile'.
src/compiler/transpile/transpile-module.ts (135, 3) TS2322 Type 'Module | undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'Module'.
src/compiler/transpile/transpile-module.ts (142, 41) TS2538 Type 'undefined' cannot be used as an index type.
src/compiler/transpile/transpile-module.ts (143, 37) TS2538 Type 'undefined' cannot be used as an index type.
src/compiler/types/generate-app-types.ts (52, 45) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/types/generate-app-types.ts (54, 5) TS18048 'config.logger' is possibly 'undefined'.
src/compiler/types/generate-app-types.ts (101, 56) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/types/generate-app-types.ts (138, 20) TS2532 Object is possibly 'undefined'.
src/compiler/types/generate-app-types.ts (156, 20) TS2532 Object is possibly 'undefined'.
src/compiler/types/tests/validate-package-json.spec.ts (39, 36) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/types/validate-build-package-json.ts (102, 42) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/types/validate-build-package-json.ts (306, 69) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/types/validate-build-package-json.ts (330, 70) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/dev-server/ssr-request.ts (200, 40) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string | URL'.
src/dev-server/ssr-request.ts (202, 7) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/runtime/bootstrap-custom-element.ts (81, 9) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/bootstrap-custom-element.ts (82, 23) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/bootstrap-custom-element.ts (84, 43) TS2345 Argument of type 'string | null | undefined' is not assignable to parameter of type 'string | undefined'.
src/runtime/bootstrap-custom-element.ts (85, 52) TS2538 Type 'null' cannot be used as an index type.
src/runtime/bootstrap-custom-element.ts (85, 52) TS2538 Type 'undefined' cannot be used as an index type.
src/runtime/bootstrap-custom-element.ts (91, 9) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/bootstrap-custom-element.ts (91, 9) TS2322 Type 'string | null | undefined' is not assignable to type 'string | undefined'.
src/runtime/bootstrap-custom-element.ts (93, 22) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/runtime/bootstrap-lazy.ts (124, 45) TS2345 Argument of type 'this' is not assignable to parameter of type 'HostElement'. Type 'HostElement' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/declarations/stencil-private").HostElement'. The types returned by 'componentOnReady()' are incompatible between these types. Type 'Promise | undefined' is not assignable to type 'Promise'. Type 'undefined' is not assignable to type 'Promise'.
src/runtime/bootstrap-lazy.ts (129, 46) TS2345 Argument of type 'this' is not assignable to parameter of type 'HostElement'.
src/runtime/bootstrap-lazy.ts (133, 18) TS2532 Object is possibly 'undefined'.
src/runtime/connected-callback.ts (73, 30) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/runtime/connected-callback.ts (73, 40) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/connected-callback.ts (96, 49) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/runtime/connected-callback.ts (98, 34) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/runtime/connected-callback.ts (105, 34) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/runtime/connected-callback.ts (108, 29) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/dom-extras.ts (148, 11) TS2532 Object is possibly 'undefined'.
src/runtime/dom-extras.ts (183, 5) TS2322 Type 'RenderNode | null' is not assignable to type 'RenderNode'. Type 'null' is not assignable to type 'RenderNode'.
src/runtime/styles.ts (61, 15) TS2345 Argument of type 'HTMLElement | undefined' is not assignable to parameter of type 'HTMLElement'. Type 'undefined' is not assignable to type 'HTMLElement'.
src/runtime/styles.ts (73, 15) TS2322 Type 'null' is not assignable to type 'Set | undefined'.
src/runtime/styles.ts (110, 42) TS18048 'elm' is possibly 'undefined'.
src/runtime/styles.ts (110, 59) TS18048 'elm' is possibly 'undefined'.
src/runtime/styles.ts (110, 76) TS18048 'elm' is possibly 'undefined'.
src/runtime/styles.ts (124, 5) TS18048 'elm' is possibly 'undefined'.
src/runtime/styles.ts (125, 5) TS18048 'elm' is possibly 'undefined'.
src/runtime/styles.ts (128, 7) TS18048 'elm' is possibly 'undefined'.
src/runtime/update-component.ts (94, 5) TS18048 'hostRef.$renderCount$' is possibly 'undefined'.
src/runtime/update-component.ts (130, 9) TS18048 'childrenPromises' is possibly 'undefined'.
src/runtime/update-component.ts (133, 19) TS2769 No overload matches this call. Overload 1 of 2, '(values: [] | readonly unknown[]): Promise<unknown[] | []>', gave the following error. Argument of type 'Promise[] | undefined' is not assignable to parameter of type '[] | readonly unknown[]'. Type 'undefined' is not assignable to type '[] | readonly unknown[]'. Overload 2 of 2, '(values: Iterable<void | PromiseLike>): Promise<void[]>', gave the following error. Argument of type 'Promise[] | undefined' is not assignable to parameter of type 'Iterable<void | PromiseLike>'. Type 'undefined' is not assignable to type 'Iterable<void | PromiseLike>'.
src/runtime/update-component.ts (135, 7) TS18048 'childrenPromises' is possibly 'undefined'.
src/runtime/update-component.ts (203, 22) TS2345 Argument of type 'HostElement | undefined' is not assignable to parameter of type 'EventTarget'. Type 'undefined' is not assignable to type 'EventTarget'.
src/runtime/update-component.ts (210, 23) TS2345 Argument of type 'HostElement | undefined' is not assignable to parameter of type 'Element'. Type 'undefined' is not assignable to type 'Element'.
src/runtime/update-component.ts (223, 24) TS2345 Argument of type 'HostElement | undefined' is not assignable to parameter of type 'EventTarget'. Type 'undefined' is not assignable to type 'EventTarget'.
src/runtime/update-component.ts (227, 7) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/runtime/update-component.ts (246, 24) TS2345 Argument of type 'HostElement | undefined' is not assignable to parameter of type 'EventTarget'. Type 'undefined' is not assignable to type 'EventTarget'.
src/runtime/update-component.ts (251, 5) TS18048 'elm' is possibly 'undefined'.
src/runtime/update-component.ts (251, 26) TS18048 'elm' is possibly 'undefined'.
src/runtime/update-component.ts (255, 5) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/runtime/update-component.ts (277, 25) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/update-component.ts (277, 25) TS18048 'hostRef.$hostElement$' is possibly 'undefined'.
src/runtime/update-component.ts (280, 8) TS18048 'hostRef' is possibly 'undefined'.
src/runtime/update-component.ts (282, 22) TS2345 Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'.
src/sys/node/node-sys.ts (223, 5) TS2322 Type '(key: string) => string | undefined' is not assignable to type '(key: string) => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/sys/node/node-sys.ts (226, 5) TS2322 Type '() => null' is not assignable to type '(opts: { rootDir: string; moduleId: string; path: string; }) => string'. Type 'null' is not assignable to type 'string'.
src/sys/node/node-sys.ts (229, 5) TS2322 Type '() => null' is not assignable to type '(opts: { moduleId: string; path?: string | undefined; version?: string | undefined; }) => string'. Type 'null' is not assignable to type 'string'.
src/sys/node/node-sys.ts (300, 5) TS2322 Type '(p: string) => string | undefined' is not assignable to type '(p: string, encoding?: string | undefined) => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/sys/node/node-sys.ts (306, 5) TS2322 Type '() => string | undefined' is not assignable to type '() => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/sys/node/node-sys.ts (324, 9) TS2322 Type 'undefined' is not assignable to type 'string'.
src/sys/node/node-sys.ts (447, 31) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/sys/node/node-sys.ts (447, 31) TS18048 'tsSysWatchDirectory' is possibly 'undefined'.
src/sys/node/node-sys.ts (486, 31) TS2722 Cannot invoke an object which is possibly 'undefined'.
src/sys/node/node-sys.ts (486, 31) TS18048 'tsSysWatchFile' is possibly 'undefined'.
src/sys/node/node-sys.ts (492, 15) TS18048 'sys.events' is possibly 'undefined'.
src/sys/node/node-sys.ts (495, 15) TS18048 'sys.events' is possibly 'undefined'.
src/sys/node/node-sys.ts (498, 15) TS18048 'sys.events' is possibly 'undefined'.
src/testing/jest/jest-runner.ts (69, 43) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/jest/jest-runner.ts (109, 24) TS18048 'testing.emulate' is possibly 'undefined'.
src/testing/jest/test/jest-config.spec.ts (150, 37) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/jest/test/jest-config.spec.ts (164, 37) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/jest/test/jest-config.spec.ts (178, 37) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/jest/test/jest-config.spec.ts (189, 37) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/jest/test/jest-config.spec.ts (191, 12) TS18048 'parsedConfig.collectCoverageFrom' is possibly 'undefined'.
src/testing/mocks.ts (67, 5) TS2322 Type 'null' is not assignable to type 'ConfigBundle[] | undefined'.
src/testing/mocks.ts (72, 5) TS2322 Type 'null' is not assignable to type 'string | undefined'.
src/testing/mocks.ts (82, 5) TS2322 Type 'null' is not assignable to type 'OutputTarget[] | undefined'.
src/testing/mocks.ts (90, 5) TS2322 Type 'null' is not assignable to type 'TestingConfig | undefined'.
src/testing/mocks.ts (132, 5) TS2322 Type 'null' is not assignable to type 'string'.
src/testing/mocks.ts (137, 5) TS2322 Type 'null' is not assignable to type 'Cache'.
src/testing/mocks.ts (140, 5) TS2322 Type 'null' is not assignable to type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'.
src/testing/mocks.ts (143, 5) TS2322 Type 'null' is not assignable to type 'CompilerBuildResults'.
src/testing/mocks.ts (153, 33) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/testing/mocks.ts (159, 37) TS18048 'config' is possibly 'undefined'.
src/testing/mocks.ts (159, 37) TS2345 Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/testing/mocks.ts (220, 30) TS2322 Type 'null' is not assignable to type 'string'.
src/testing/mocks.ts (225, 28) TS2322 Type 'null' is not assignable to type 'string'.
src/testing/puppeteer/puppeteer-browser.ts (13, 31) TS18048 'config.sys.lazyRequire' is possibly 'undefined'.
src/testing/puppeteer/puppeteer-browser.ts (14, 21) TS18048 'config.sys.lazyRequire' is possibly 'undefined'.
src/testing/puppeteer/puppeteer-browser.ts (91, 29) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/testing/puppeteer/puppeteer-element.ts (389, 7) TS2345 Argument of type 'string | null | undefined' is not assignable to parameter of type 'SerializableOrJSHandle'. Type 'undefined' is not assignable to type 'SerializableOrJSHandle'.
src/testing/puppeteer/puppeteer-element.ts (517, 7) TS2322 Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-element.ts (520, 51) TS2345 Argument of type 'this' is not assignable to parameter of type 'E2EElementInternal'.
src/testing/puppeteer/puppeteer-element.ts (525, 5) TS2322 Type 'null' is not assignable to type 'E2EPageInternal'.
src/testing/puppeteer/puppeteer-element.ts (535, 5) TS2322 Type 'ElementHandle | null' is not assignable to type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-element.ts (537, 5) TS2322 Type 'ElementHandle | null' is not assignable to type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-element.ts (602, 43) TS18047 'elm.textContent' is possibly 'null'.
src/testing/puppeteer/puppeteer-element.ts (606, 47) TS18047 'elm.textContent' is possibly 'null'.
src/testing/puppeteer/puppeteer-element.ts (614, 24) TS2345 Argument of type 'ShadowRoot | null' is not assignable to parameter of type 'Node'. Type 'null' is not assignable to type 'Node'.
src/testing/puppeteer/puppeteer-element.ts (698, 20) TS2352 Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
src/testing/puppeteer/puppeteer-element.ts (699, 21) TS2352 Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
src/testing/puppeteer/puppeteer-element.ts (700, 11) TS2352 Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
src/testing/puppeteer/puppeteer-element.ts (701, 15) TS2352 Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
src/testing/puppeteer/puppeteer-element.ts (708, 5) TS2322 Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'.
src/testing/puppeteer/puppeteer-page.ts (85, 25) TS2345 Argument of type 'ElementHandle | null' is not assignable to parameter of type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-page.ts (90, 28) TS2345 Argument of type 'ElementHandle | null' is not assignable to parameter of type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-page.ts (95, 44) TS2345 Argument of type 'ElementHandle | null' is not assignable to parameter of type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'.
src/testing/puppeteer/puppeteer-page.ts (296, 32) TS2345 Argument of type '{ viewport: EmulateViewport | undefined; userAgent: string | undefined; }' is not assignable to parameter of type '{ viewport: Viewport; userAgent: string; }'. Types of property 'viewport' are incompatible. Type 'EmulateViewport | undefined' is not assignable to type 'Viewport'. Type 'undefined' is not assignable to type 'Viewport'.
src/utils/logger/logger-rollup.ts (69, 13) TS18048 'diagnostic.lines' is possibly 'undefined'.
src/utils/logger/logger-rollup.ts (85, 15) TS18048 'diagnostic.lines' is possibly 'undefined'.
src/utils/logger/logger-rollup.ts (97, 15) TS18048 'diagnostic.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (43, 3) TS18048 'd.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (60, 5) TS18048 'd.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (74, 5) TS18048 'd.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (111, 5) TS2322 Type 'null' is not assignable to type 'string | undefined'.
src/utils/logger/logger-typescript.ts (112, 5) TS2322 Type 'null' is not assignable to type 'string | undefined'.
src/utils/logger/logger-typescript.ts (126, 69) TS2345 Argument of type 'number | undefined' is not assignable to parameter of type 'number'. Type 'undefined' is not assignable to type 'number'.
src/utils/logger/logger-typescript.ts (133, 29) TS2345 Argument of type 'number | undefined' is not assignable to parameter of type 'number'. Type 'undefined' is not assignable to type 'number'.
src/utils/logger/logger-typescript.ts (139, 5) TS18048 'd.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (155, 7) TS18048 'd.lines' is possibly 'undefined'.
src/utils/logger/logger-typescript.ts (167, 7) TS18048 'd.lines' is possibly 'undefined'.
src/utils/message-utils.ts (101, 11) TS18048 'err.lines' is possibly 'undefined'.
src/utils/message-utils.ts (111, 13) TS18048 'err.lines' is possibly 'undefined'.
src/utils/message-utils.ts (122, 13) TS18048 'err.lines' is possibly 'undefined'.
src/utils/test/util.spec.ts (175, 73) TS2345 Argument of type 'undefined' is not assignable to parameter of type 'string'.
src/utils/test/util.spec.ts (187, 9) TS2322 Type 'undefined' is not assignable to type 'string'.
src/utils/test/util.spec.ts (250, 38) TS2345 Argument of type '{ tags: never[]; text: string; } | null | undefined' is not assignable to parameter of type 'CompilerJsDoc | undefined'. Type 'null' is not assignable to type 'CompilerJsDoc | undefined'.
src/utils/util.ts (166, 51) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/utils/util.ts (169, 54) TS2345 Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.

reports and statistics

Our most error-prone files
Path Error Count
src/compiler/config/test/validate-dev-server.spec.ts 49
src/compiler/config/test/validate-output-www.spec.ts 40
src/screenshot/connector-base.ts 40
src/dev-server/index.ts 38
src/mock-doc/serialize-node.ts 36
src/compiler/sys/tests/in-memory-fs.spec.ts 34
src/screenshot/screenshot-compare.ts 33
src/compiler/transformers/test/parse-props.spec.ts 32
src/dev-server/server-process.ts 32
src/runtime/vdom/vdom-render.ts 31
src/compiler/sys/typescript/typescript-config.ts 28
src/compiler/build/build-stats.ts 27
src/compiler/output-targets/dist-lazy/generate-lazy-module.ts 26
src/compiler/prerender/prerender-main.ts 25
src/sys/node/test/worker-manager.spec.ts 24
src/compiler/style/test/optimize-css.spec.ts 23
src/runtime/update-component.ts 23
src/compiler/config/test/validate-paths.spec.ts 22
src/utils/test/message-utils.spec.ts 21
src/compiler/plugin/plugin.ts 20
Our most common errors
Typescript Error Code Count Error messages
TS2345 610
Error messages Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'.
Type 'undefined' is not assignable to type 'CompilerSystem'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type 'Promise<(() => void) | null>' is not assignable to parameter of type 'Promise<() => void>'.

Argument of type 'null' is not assignable to parameter of type 'BuildResultsComponentGraph'.

Argument of type 'DevServerConfig | undefined' is not assignable to parameter of type 'StencilDevServerConfig'.
Type 'undefined' is not assignable to type 'StencilDevServerConfig'.

Argument of type 'Promise<(() => void) | null>' is not assignable to parameter of type 'Promise<() => void>'.
Type '(() => void) | null' is not assignable to type '() => void'.
Type 'null' is not assignable to type '() => void'.

Argument of type 'ComponentRuntimeHostListener[] | undefined' is not assignable to parameter of type 'ComponentRuntimeHostListener[]'.
Type 'undefined' is not assignable to type 'ComponentRuntimeHostListener[]'.

Argument of type 'HTMLScriptElement | null | undefined' is not assignable to parameter of type 'HTMLScriptElement'.
Type 'undefined' is not assignable to type 'HTMLScriptElement'.

Argument of type 'string | null' is not assignable to parameter of type 'string'.
Type 'null' is not assignable to type 'string'.

Argument of type 'Logger | undefined' is not assignable to parameter of type 'Logger'.
Type 'undefined' is not assignable to type 'Logger'.

Argument of type 'string[] | undefined' is not assignable to parameter of type 'string[]'.
Type 'undefined' is not assignable to type 'string[]'.

Argument of type 'string' is not assignable to parameter of type 'never'.

Argument of type 'Diagnostic[] | undefined' is not assignable to parameter of type 'readonly Diagnostic[]'.
Type 'undefined' is not assignable to type 'readonly Diagnostic[]'.

Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'.

Argument of type 'BuildConditionals | undefined' is not assignable to parameter of type 'BuildConditionals'.
Type 'undefined' is not assignable to type 'BuildConditionals'.

Argument of type 'Diagnostic[] | undefined' is not assignable to parameter of type 'Diagnostic[]'.
Type 'undefined' is not assignable to type 'Diagnostic[]'.

Argument of type '{ styleText: string; output: string; map: null; diagnostics: never[]; imports: never[]; defaultVarName: string; styleDocs: never[]; }' is not assignable to parameter of type 'never'.

Argument of type 'WorkerMeta | undefined' is not assignable to parameter of type 'WorkerMeta'.
Type 'undefined' is not assignable to type 'WorkerMeta'.

Argument of type 'string | null | undefined' is not assignable to parameter of type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'.
Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'.

Argument of type 'RollupConfig | undefined' is not assignable to parameter of type 'RollupConfig'.
Type 'undefined' is not assignable to type 'RollupConfig'.

Argument of type '(string[] | undefined)[]' is not assignable to parameter of type 'string[][]'.
Type 'string[] | undefined' is not assignable to type 'string[]'.
Type 'undefined' is not assignable to type 'string[]'.

Argument of type 'ComponentCompilerMeta | undefined' is not assignable to parameter of type 'ComponentCompilerMeta'.
Type 'undefined' is not assignable to type 'ComponentCompilerMeta'.

Argument of type 'true | Object | undefined' is not assignable to parameter of type 'boolean | Object | null'.
Type 'undefined' is not assignable to type 'boolean | Object | null'.

Argument of type 'SourceTarget | undefined' is not assignable to parameter of type 'SourceTarget'.
Type 'undefined' is not assignable to type 'SourceTarget'.

Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'.
Type 'undefined' is not assignable to type 'boolean'.

Argument of type '(string | undefined)[]' is not assignable to parameter of type 'string[]'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type '(string | undefined)[]' is not assignable to parameter of type 'string[]'.

Argument of type 'RollupSourceMap | undefined' is not assignable to parameter of type 'SourceMap'.
Type 'undefined' is not assignable to type 'SourceMap'.

Argument of type 'EntryModule | undefined' is not assignable to parameter of type 'EntryModule'.
Type 'undefined' is not assignable to type 'EntryModule'.

Argument of type '(Module | undefined)[]' is not assignable to parameter of type 'Module[]'.
Type 'Module | undefined' is not assignable to type 'Module'.
Type 'undefined' is not assignable to type 'Module'.

Argument of type 'Document | null' is not assignable to parameter of type 'Document'.
Type 'null' is not assignable to type 'Document'.

Argument of type 'Document | null' is not assignable to parameter of type 'Node | MockNode'.
Type 'null' is not assignable to type 'Node | MockNode'.

Argument of type 'HydrateAnchorElement' is not assignable to parameter of type '{ [attrName: string]: string; }'.
'string' index signatures are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type 'URL | null' is not assignable to parameter of type 'URL'.
Type 'null' is not assignable to type 'URL'.

Argument of type 'number | undefined' is not assignable to parameter of type 'number'.
Type 'undefined' is not assignable to type 'number'.

Argument of type 'SitemapXmpResults | null' is not assignable to parameter of type 'SitemapXmpResults'.
Type 'null' is not assignable to type 'SitemapXmpResults'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | URL'.

Argument of type 'Map<string, string[]> | undefined' is not assignable to parameter of type 'Map<string, string[]>'.
Type 'undefined' is not assignable to type 'Map<string, string[]>'.

Argument of type 'undefined' is not assignable to parameter of type 'string'.

Argument of type 'ServiceWorkerConfig | undefined' is not assignable to parameter of type 'ServiceWorkerConfig'.
Type 'undefined' is not assignable to type 'ServiceWorkerConfig'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | URL'.
Type 'undefined' is not assignable to type 'string | URL'.

Argument of type 'CssNode[] | null | undefined' is not assignable to parameter of type 'void | CssNode[]'.

Argument of type 'CssNode[] | null | undefined' is not assignable to parameter of type 'void | CssNode[]'.
Type 'null' is not assignable to type 'void | CssNode[]'.

Argument of type 'null' is not assignable to parameter of type 'string'.

Argument of type 'CompilerSystemCreateDirectoryOptions | undefined' is not assignable to parameter of type 'CompilerSystemCreateDirectoryOptions'.
Type 'undefined' is not assignable to type 'CompilerSystemCreateDirectoryOptions'.

Argument of type 'null' is not assignable to parameter of type 'CompilerFileWatcherEvent'.

Argument of type 'null' is not assignable to parameter of type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'.

Argument of type 'undefined' is not assignable to parameter of type 'TypeChecker'.

Argument of type 'CollectionBundleManifest[] | undefined' is not assignable to parameter of type 'any[]'.
Type 'undefined' is not assignable to type 'any[]'.

Argument of type 'Module | undefined' is not assignable to parameter of type 'Module'.
Type 'undefined' is not assignable to type 'Module'.

Argument of type 'NodeArray | undefined' is not assignable to parameter of type 'NodeArray | HeritageClause[]'.
Type 'undefined' is not assignable to type 'NodeArray | HeritageClause[]'.

Argument of type 'Block | undefined' is not assignable to parameter of type 'Block'.
Type 'undefined' is not assignable to type 'Block'.

Argument of type 'Expression | undefined' is not assignable to parameter of type 'Expression'.
Type 'undefined' is not assignable to type 'Expression'.

Argument of type 'Symbol | undefined' is not assignable to parameter of type 'Symbol'.
Type 'undefined' is not assignable to type 'Symbol'.

Argument of type 'TypeNode | undefined' is not assignable to parameter of type 'Node'.
Type 'undefined' is not assignable to type 'Node'.

Argument of type '(PropertyAssignment | null)[]' is not assignable to parameter of type 'readonly ObjectLiteralElementLike[]'.
Type 'PropertyAssignment | null' is not assignable to type 'ObjectLiteralElementLike'.
Type 'null' is not assignable to type 'ObjectLiteralElementLike'.

Argument of type 'Signature | undefined' is not assignable to parameter of type 'Signature'.
Type 'undefined' is not assignable to type 'Signature'.

Argument of type 'Identifier | undefined' is not assignable to parameter of type 'Node'.
Type 'undefined' is not assignable to type 'Node'.

Argument of type 'Config | null | undefined' is not assignable to parameter of type 'Config'.
Type 'undefined' is not assignable to type 'Config'.

Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.

Argument of type 'PropertyName | undefined' is not assignable to parameter of type 'PropertyName'.
Type 'undefined' is not assignable to type 'PropertyName'.

Argument of type 'NamedExportBindings | undefined' is not assignable to parameter of type 'Node'.
Type 'undefined' is not assignable to type 'Node'.

Argument of type 'Declaration | undefined' is not assignable to parameter of type 'Node'.
Type 'undefined' is not assignable to type 'Node'.

Argument of type 'Identifier | undefined' is not assignable to parameter of type 'string | BindingName'.
Type 'undefined' is not assignable to type 'string | BindingName'.

Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'.
Type 'undefined' is not assignable to type 'ScriptTarget | CreateSourceFileOptions'.

Argument of type 'Diagnostic' is not assignable to parameter of type 'DiagnosticWithLocation'.
Types of property 'file' are incompatible.
Type 'SourceFile | undefined' is not assignable to type 'SourceFile'.
Type 'undefined' is not assignable to type 'SourceFile'.

Argument of type '(...pathSegments: string[]) => string | undefined' is not assignable to parameter of type '(...args: string[]) => string'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type 'OpenInEditorCallback | undefined' is not assignable to parameter of type 'OpenInEditorCallback'.
Type 'undefined' is not assignable to type 'OpenInEditorCallback'.

Argument of type 'CompilerWatcher | undefined' is not assignable to parameter of type 'CompilerWatcher'.
Type 'undefined' is not assignable to type 'CompilerWatcher'.

Argument of type '{ editor: string | undefined; }' is not assignable to parameter of type 'OpenInEditorOptions'.
Types of property 'editor' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Argument of type 'string | undefined' is not assignable to parameter of type 'PathLike'.

Argument of type 'DevServerConfig | undefined' is not assignable to parameter of type 'DevServerConfig'.
Type 'undefined' is not assignable to type 'DevServerConfig'.

Argument of type 'CompilerBuildResults | undefined' is not assignable to parameter of type 'CompilerBuildResults'.
Type 'undefined' is not assignable to type 'CompilerBuildResults'.

Argument of type 'Window | undefined' is not assignable to parameter of type 'Window'.
Type 'undefined' is not assignable to type 'Window'.

Argument of type 'SerializeDocumentOptions | undefined' is not assignable to parameter of type 'HydrateDocumentOptions'.
Type 'undefined' is not assignable to type 'HydrateDocumentOptions'.

Argument of type 'HydrateDocumentOptions | undefined' is not assignable to parameter of type 'HydrateDocumentOptions'.
Type 'undefined' is not assignable to type 'HydrateDocumentOptions'.

Argument of type 'MockNode | null' is not assignable to parameter of type 'MockNode'.
Type 'null' is not assignable to type 'MockNode'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | null'.
Type 'undefined' is not assignable to type 'string | null'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | null'.

Argument of type 'ShadowRoot | null' is not assignable to parameter of type 'Node'.
Type 'null' is not assignable to type 'Node'.

Argument of type 'MockElement' is not assignable to parameter of type 'MockHTMLElement'.
Types of property 'namespaceURI' are incompatible.
Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Argument of type 'null' is not assignable to parameter of type 'string | Node'.

Argument of type 'null' is not assignable to parameter of type 'string | boolean | undefined'.

Argument of type '(Window & typeof globalThis) | null' is not assignable to parameter of type 'Window'.
Type 'null' is not assignable to type 'Window'.

Argument of type 'string | null | undefined' is not assignable to parameter of type 'string | undefined'.

Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'.
Type 'undefined' is not assignable to type 'HostRef'.

Argument of type 'this' is not assignable to parameter of type 'HostElement'.
Type 'HostElement' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/declarations/stencil-private").HostElement'.
The types returned by 'componentOnReady()' are incompatible between these types.
Type 'Promise | undefined' is not assignable to type 'Promise'.
Type 'undefined' is not assignable to type 'Promise'.

Argument of type 'this' is not assignable to parameter of type 'HostElement'.

Argument of type 'string | null' is not assignable to parameter of type 'string | undefined'.

Argument of type 'PropertyDescriptor | undefined' is not assignable to parameter of type 'PropertyDescriptor & ThisType'.
Type 'undefined' is not assignable to type 'PropertyDescriptor & ThisType'.
Type 'undefined' is not assignable to type 'PropertyDescriptor'.

Argument of type 'HTMLElement | undefined' is not assignable to parameter of type 'HTMLElement'.
Type 'undefined' is not assignable to type 'HTMLElement'.

Argument of type 'HostElement | undefined' is not assignable to parameter of type 'HostElement'.
Type 'undefined' is not assignable to type 'HostElement'.

Argument of type 'HostElement | undefined' is not assignable to parameter of type 'EventTarget'.
Type 'undefined' is not assignable to type 'EventTarget'.

Argument of type 'HostElement | undefined' is not assignable to parameter of type 'Element'.
Type 'undefined' is not assignable to type 'Element'.

Argument of type 'VNode[] | undefined' is not assignable to parameter of type 'VNode[]'.
Type 'undefined' is not assignable to type 'VNode[]'.

Argument of type 'null | undefined' is not assignable to parameter of type 'ChildType'.
Type 'undefined' is not assignable to type 'ChildType'.

Argument of type 'VNode | null' is not assignable to parameter of type 'ChildType'.
Type 'null' is not assignable to type 'ChildType'.

Argument of type 'VNode | undefined' is not assignable to parameter of type 'ChildType'.
Type 'undefined' is not assignable to type 'ChildType'.

Argument of type 'VNode | null | undefined' is not assignable to parameter of type 'ChildType'.
Type 'undefined' is not assignable to type 'ChildType'.

Argument of type 'null | undefined' is not assignable to parameter of type 'ChildType'.

Argument of type 'RenderNode | undefined' is not assignable to parameter of type 'Node | null'.
Type 'undefined' is not assignable to type 'Node | null'.

Argument of type 'VNode | undefined' is not assignable to parameter of type 'VNode'.
Type 'undefined' is not assignable to type 'VNode'.

Argument of type 'null' is not assignable to parameter of type 'VNode'.

Argument of type 'RenderNode | undefined' is not assignable to parameter of type 'Node'.
Type 'undefined' is not assignable to type 'Node'.

Argument of type 'null' is not assignable to parameter of type 'RenderNode'.

Argument of type 'ScreenshotDiff | undefined' is not assignable to parameter of type 'ScreenshotDiff'.
Type 'undefined' is not assignable to type 'ScreenshotDiff'.

Argument of type 'string | undefined' is not assignable to parameter of type 'PathLike'.
Type 'undefined' is not assignable to type 'PathLike'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | SemVer'.
Type 'undefined' is not assignable to type 'string | SemVer'.

Argument of type 'string | undefined' is not assignable to parameter of type 'string | SemVer'.

Argument of type 'null' is not assignable to parameter of type 'number | undefined'.

Argument of type 'null' is not assignable to parameter of type 'number | PromiseLike'.

Argument of type 'CompilerWorkerTask | undefined' is not assignable to parameter of type 'CompilerWorkerTask'.
Type 'undefined' is not assignable to type 'CompilerWorkerTask'.

Argument of type 'null' is not assignable to parameter of type 'CompilerWorkerTask'.

Argument of type 'undefined' is not assignable to parameter of type 'ErrorHandler'.

Argument of type 'string | undefined' is not assignable to parameter of type 'MockRequestInfo'.
Type 'undefined' is not assignable to type 'MockRequestInfo'.

Argument of type 'string | undefined' is not assignable to parameter of type 'MockRequestInfo'.

Argument of type 'MockResponse | undefined' is not assignable to parameter of type 'MockResponse'.
Type 'undefined' is not assignable to type 'MockResponse'.

Argument of type 'RuntimeRef | undefined' is not assignable to parameter of type 'RuntimeRef'.
Type 'undefined' is not assignable to type 'RuntimeRef'.

Argument of type 'this' is not assignable to parameter of type 'E2EElementInternal'.
Type 'E2EElement' is not assignable to type 'E2EElementInternal'.
Types of property 'find' are incompatible.
Type '(selector: string) => Promise<E2EElement | null>' is not assignable to type '(selector: FindSelector) => Promise'.

Argument of type 'string | null | undefined' is not assignable to parameter of type 'SerializableOrJSHandle'.
Type 'undefined' is not assignable to type 'SerializableOrJSHandle'.

Argument of type 'this' is not assignable to parameter of type 'E2EElementInternal'.

Argument of type 'ElementHandle | null' is not assignable to parameter of type 'ElementHandle'.
Type 'null' is not assignable to type 'ElementHandle'.

Argument of type '{ viewport: EmulateViewport | undefined; userAgent: string | undefined; }' is not assignable to parameter of type '{ viewport: Viewport; userAgent: string; }'.
Types of property 'viewport' are incompatible.
Type 'EmulateViewport | undefined' is not assignable to type 'Viewport'.
Type 'undefined' is not assignable to type 'Viewport'.

Argument of type 'null' is not assignable to parameter of type 'SourceMap | undefined'.

Argument of type '{ tags: never[]; text: string; } | null | undefined' is not assignable to parameter of type 'CompilerJsDoc | undefined'.
Type 'null' is not assignable to type 'CompilerJsDoc | undefined'.
TS18048 584
Error messages 'config.sys' is possibly 'undefined'.

'sys.details' is possibly 'undefined'.

'details' is possibly 'undefined'.

'config.devServer' is possibly 'undefined'.

'config.sys.getDevServerExecutingPath' is possibly 'undefined'.

'config.sys.lazyRequire' is possibly 'undefined'.

'sys.parseYarnLockFile' is possibly 'undefined'.

'scope.styleEl' is possibly 'undefined'.

'moduleFile' is possibly 'undefined'.

'config.extras' is possibly 'undefined'.

'config.logger' is possibly 'undefined'.

'hmr' is possibly 'undefined'.

'config.outputTargets' is possibly 'undefined'.

'c.moduleFiles' is possibly 'undefined'.

'a.name' is possibly 'undefined'.

'b.name' is possibly 'undefined'.

'orgNodeResolveId' is possibly 'undefined'.

'config.rollupPlugins' is possibly 'undefined'.

'config.rollupConfig' is possibly 'undefined'.

'config.rollupConfig.inputOptions' is possibly 'undefined'.

'compilerCtx.worker' is possibly 'undefined'.

'pluginTransforms.dependencies' is possibly 'undefined'.

'lastModified' is possibly 'undefined'.

'config.devServer.historyApiFallback' is possibly 'undefined'.

'inputConfig.devServer' is possibly 'undefined'.

'inputConfig.flags' is possibly 'undefined'.

'userConfig.flags' is possibly 'undefined'.

'www' is possibly 'undefined'.

'outputTarget' is possibly 'undefined'.

'o' is possibly 'undefined'.

'cmp' is possibly 'undefined'.

'deps' is possibly 'undefined'.

'cmp.directDependents' is possibly 'undefined'.

'cmp.dependents' is possibly 'undefined'.

'config.bundles' is possibly 'undefined'.

'c.dependencies' is possibly 'undefined'.

'c.directDependencies' is possibly 'undefined'.

'outputTargets' is possibly 'undefined'.

'opts' is possibly 'undefined'.

'errorLine.text' is possibly 'undefined'.

'errorLine.errorLength' is possibly 'undefined'.

'd.lines' is possibly 'undefined'.

'opts.format' is possibly 'undefined'.

'entryModule' is possibly 'undefined'.

'a.directDependents' is possibly 'undefined'.

'b.directDependents' is possibly 'undefined'.

'a.directDependencies' is possibly 'undefined'.

'b.directDependencies' is possibly 'undefined'.

'a.dependents' is possibly 'undefined'.

'b.dependents' is possibly 'undefined'.

'a.dependencies' is possibly 'undefined'.

'b.dependencies' is possibly 'undefined'.

'bundleOptions.loader' is possibly 'undefined'.

'pluginCtx.config.plugins' is possibly 'undefined'.

'transformResults.id' is possibly 'undefined'.

'transformResults.dependencies' is possibly 'undefined'.

'transformResults.diagnostics' is possibly 'undefined'.

'config.maxConcurrentWorkers' is possibly 'undefined'.

'hydrateOpts.staticComponents' is possibly 'undefined'.

'sys.generateFileHash' is possibly 'undefined'.

'manager.config.logger' is possibly 'undefined'.

'manager.config.sys' is possibly 'undefined'.

'serviceWorker' is possibly 'undefined'.

'node.comment' is possibly 'undefined'.

'node.selectors' is possibly 'undefined'.

'node.values' is possibly 'undefined'.

'moduleId' is possibly 'undefined'.

'sys' is possibly 'undefined'.

'tsResults.diagnostics' is possibly 'undefined'.

'r.resolvedModule' is possibly 'undefined'.

'results' is possibly 'undefined'.

'compilerSystem.watchDirectory' is possibly 'undefined'.

'compilerSystem.watchFile' is possibly 'undefined'.

'collectionManifest.bundles' is possibly 'undefined'.

'cstrMethod.body' is possibly 'undefined'.

'cmp.dependencies' is possibly 'undefined'.

'foundDep' is possibly 'undefined'.

'connectedCallback.body' is possibly 'undefined'.

'cmpNode.name' is possibly 'undefined'.

'symbol.declarations' is possibly 'undefined'.

'signature' is possibly 'undefined'.

'collection.moduleFiles' is possibly 'undefined'.

'tsSourceFiles' is possibly 'undefined'.

'results.data' is possibly 'undefined'.

'results.imports' is possibly 'undefined'.

'msg.requestLog' is possibly 'undefined'.

'msg.error' is possibly 'undefined'.

'msg.buildResults' is possibly 'undefined'.

'a.priority' is possibly 'undefined'.

'b.priority' is possibly 'undefined'.

'devServerConfig.historyApiFallback' is possibly 'undefined'.

'devServerConfig.basePath' is possibly 'undefined'.

'req.pathname' is possibly 'undefined'.

'req.stats' is possibly 'undefined'.

'devServerConfig' is possibly 'undefined'.

'res.$content' is possibly 'undefined'.

'opts.maxHydrateCount' is possibly 'undefined'.

'ref' is possibly 'undefined'.

'opts.excludeComponents' is possibly 'undefined'.

'hostRef' is possibly 'undefined'.

'hostRef.$instanceValues$' is possibly 'undefined'.

'ref.$onInstancePromise$' is possibly 'undefined'.

'ref.$lazyInstance$' is possibly 'undefined'.

'opts.indentSpaces' is possibly 'undefined'.

'opts.approximateLineWidth' is possibly 'undefined'.

'plt.$orgLocNodes$' is possibly 'undefined'.

'hostRef.$lazyInstance$' is possibly 'undefined'.

'cmpMeta.$attrsToReflect$' is possibly 'undefined'.

'cmpMeta.$members$' is possibly 'undefined'.

'elm' is possibly 'undefined'.

'hostRef.$renderCount$' is possibly 'undefined'.

'childrenPromises' is possibly 'undefined'.

'hostRef.$hostElement$' is possibly 'undefined'.

'nodeRef' is possibly 'undefined'.

'hostElm' is possibly 'undefined'.

'screenshot.diff' is possibly 'undefined'.

'screenshotCache.items' is possibly 'undefined'.

'a.width' is possibly 'undefined'.

'b.width' is possibly 'undefined'.

'a.height' is possibly 'undefined'.

'b.height' is possibly 'undefined'.

'a.id' is possibly 'undefined'.

'b.id' is possibly 'undefined'.

'emulateConfig.viewport' is possibly 'undefined'.

'emulateConfig.viewport.deviceScaleFactor' is possibly 'undefined'.

'res.statusCode' is possibly 'undefined'.

'tsSysWatchDirectory' is possibly 'undefined'.

'tsSysWatchFile' is possibly 'undefined'.

'sys.events' is possibly 'undefined'.

't.retries' is possibly 'undefined'.

'testing.emulate' is possibly 'undefined'.

'parsedConfig.collectCoverageFrom' is possibly 'undefined'.

'compare.width' is possibly 'undefined'.

'compare.deviceScaleFactor' is possibly 'undefined'.

'compare.height' is possibly 'undefined'.

'config' is possibly 'undefined'.

'screenshotEmulate.viewport' is possibly 'undefined'.

'diagnostic.lines' is possibly 'undefined'.

'd.absFilePath' is possibly 'undefined'.

'd.code' is possibly 'undefined'.

'err.lines' is possibly 'undefined'.
TS2322 508
Error messages Type 'string | null | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'null' is not assignable to type 'DevServerConfig | undefined'.

Type 'boolean | null | undefined' is not assignable to type 'boolean | undefined'.
Type 'null' is not assignable to type 'boolean | undefined'.

Type 'null' is not assignable to type 'DevServer'.

Type 'undefined' is not assignable to type 'ComponentConstructor | Promise'.

Type 'HTMLElement | null' is not assignable to type 'HTMLElement'.
Type 'null' is not assignable to type 'HTMLElement'.

Type '({ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; } | { ...; })[]' is not assignable to type 'RollupResult[]'.
Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; } | { ...; }' is not assignable to type 'RollupResult'.
Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; }' is not assignable to type 'RollupResult'.
Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; }' is not assignable to type 'RollupChunkResult'.
Types of property 'moduleFormat' are incompatible.
Type 'ModuleFormat | undefined' is not assignable to type 'ModuleFormat'.
Type 'undefined' is not assignable to type 'ModuleFormat'.

Type 'null' is not assignable to type 'CompilerBuildResults'.

Type 'undefined' is not assignable to type 'string'.

Type 'null' is not assignable to type 'string'.

Type 'undefined' is not assignable to type 'Document'.

Type 'null' is not assignable to type 'Promise'.

Type 'null' is not assignable to type 'LoggerTimeSpan'.

Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'boolean | undefined' is not assignable to type 'boolean'.

Type 'number | undefined' is not assignable to type 'number'.
Type 'undefined' is not assignable to type 'number'.

Type 'boolean | "prod" | undefined' is not assignable to type 'boolean | "prod"'.
Type 'undefined' is not assignable to type 'boolean | "prod"'.

Type 'BuildResultsComponentGraph | undefined' is not assignable to type 'BuildResultsComponentGraph'.
Type 'undefined' is not assignable to type 'BuildResultsComponentGraph'.

Type 'RollupResults | undefined' is not assignable to type 'RollupResults'.
Type 'undefined' is not assignable to type 'RollupResults'.

Type '{ name: string | undefined; source: string; tags: any[]; }[]' is not assignable to type '{ name: string; source: string; tags: string[]; }[]'.
Type '{ name: string | undefined; source: string; tags: any[]; }' is not assignable to type '{ name: string; source: string; tags: string[]; }'.
Types of property 'name' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'null' is not assignable to type 'CompilerWorkerContext'.

Type 'null' is not assignable to type 'WatchOfConfigFile'.

Type 'null' is not assignable to type 'Promise<(void | void[])[]>'.

Type 'Promise<(void | void[] | null)[]>' is not assignable to type 'Promise<(void | void[])[]>'.
Type '(void | void[] | null)[]' is not assignable to type '(void | void[])[]'.
Type 'void | void[] | null' is not assignable to type 'void | void[]'.
Type 'null' is not assignable to type 'void | void[]'.

Type 'null' is not assignable to type '{ program: WatchOfConfigFile; rebuild: () => void; }'.

Type '(this: PluginContext, importee: string, importer: string) => Promise' is not assignable to type 'ResolveIdHook'.
Types of parameters 'importer' and 'importer' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type '(this: PluginContext, importee: string, importer: string) => Promise' is not assignable to type 'ResolveIdHook'.
Types of parameters 'importer' and 'importer' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Type 'null' is not assignable to type 'string | undefined'.

Type '{ code: string; exports: string[]; workerMsgId: string; dependencies: string[]; } | null' is not assignable to type 'WorkerMeta | undefined'.
Type 'null' is not assignable to type 'WorkerMeta | undefined'.

Type 'WorkerMeta | undefined' is not assignable to type 'WorkerMeta'.
Type 'undefined' is not assignable to type 'WorkerMeta'.

Type 'CompilerSystem | undefined' is not assignable to type 'CompilerSystem'.
Type 'undefined' is not assignable to type 'CompilerSystem'.

Type 'Logger | undefined' is not assignable to type 'Logger'.
Type 'undefined' is not assignable to type 'Logger'.

Type 'import("/home/runner/work/stencil/stencil/src/compiler/cache").Cache' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/declarations/stencil-private").Cache'.
The types returned by 'get(...)' are incompatible between these types.
Type 'Promise<string | null>' is not assignable to type 'Promise'.

Type 'null' is not assignable to type 'ValidatedConfig'.
Type 'null' is not assignable to type 'Config'.

Type 'null' is not assignable to type 'string[]'.

Type '{ dir: string; buildDir: string; collectionDir: string | null; typesDir: string; esmLoaderPath: string; copy: d.CopyTask[]; polyfills: boolean | undefined; empty: boolean; transformAliasedImportPathsInCollection: boolean; type: "dist"; }' is not assignable to type 'Required'.
Types of property 'polyfills' are incompatible.
Type 'boolean | undefined' is not assignable to type 'boolean'.

Type 'null' is not assignable to type 'number | undefined'.

Type 'null' is not assignable to type 'HistoryApiFallback | undefined'.

Type 'null' is not assignable to type 'CopyTask[] | undefined'.

Type '{ dirPath: string; filePath: string; fileName: string; readmePath: string; usagesDir: string; tag: string; readme: string | undefined; overview: string; usage: JsonDocsUsage; ... 13 more ...; listeners: JsonDocsListener[]; }[]' is not assignable to type 'JsonDocsComponent[]'.
Type '{ dirPath: string; filePath: string; fileName: string; readmePath: string; usagesDir: string; tag: string; readme: string | undefined; overview: string; usage: d.JsonDocsUsage; docs: string; ... 12 more ...; listeners: d.JsonDocsListener[]; }' is not assignable to type 'JsonDocsComponent'.
Types of property 'readme' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'string[] | undefined' is not assignable to type 'string[]'.
Type 'undefined' is not assignable to type 'string[]'.

Type '{ name: string; type: string; mutable: boolean; attr: string | undefined; reflectToAttr: boolean; docs: string; docsTags: CompilerJsDocTagInfo[]; default: string | undefined; deprecation: string | undefined; values: JsonDocsValue[]; optional: boolean; required: boolean; }[]' is not assignable to type 'JsonDocsProp[]'.
Type '{ name: string; type: string; mutable: boolean; attr: string | undefined; reflectToAttr: boolean; docs: string; docsTags: d.CompilerJsDocTagInfo[]; default: string | undefined; deprecation: string | undefined; values: d.JsonDocsValue[]; optional: boolean; required: boolean; }' is not assignable to type 'JsonDocsProp'.
Types of property 'default' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type '{ name: string; type: string; mutable: false; attr: string; reflectToAttr: false; docs: string; docsTags: never[]; default: undefined; deprecation: undefined; values: JsonDocsValue[]; optional: true; required: false; }[]' is not assignable to type 'JsonDocsProp[]'.
Type '{ name: string; type: string; mutable: false; attr: string; reflectToAttr: false; docs: string; docsTags: never[]; default: undefined; deprecation: undefined; values: d.JsonDocsValue[]; optional: true; required: false; }' is not assignable to type 'JsonDocsProp'.
Types of property 'default' are incompatible.
Type 'undefined' is not assignable to type 'string'.

Type '(ComponentCompilerMeta | undefined)[]' is not assignable to type 'ComponentCompilerMeta[]'.
Type 'ComponentCompilerMeta | undefined' is not assignable to type 'ComponentCompilerMeta'.
Type 'undefined' is not assignable to type 'ComponentCompilerMeta'.

Type '(ComponentCompilerMeta | undefined)[][]' is not assignable to type 'readonly ComponentCompilerMeta[][]'.
Type '(ComponentCompilerMeta | undefined)[]' is not assignable to type 'ComponentCompilerMeta[]'.

Type 'null' is not assignable to type 'boolean | SourceMapOptions | undefined'.

Type 'null' is not assignable to type 'SourceMap | undefined'.

Type '{ name: string | undefined; tags: string[]; }[]' is not assignable to type 'CollectionDependencyData[]'.
Type '{ name: string | undefined; tags: string[]; }' is not assignable to type 'CollectionDependencyData'.
Types of property 'name' are incompatible.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'string | undefined' is not assignable to type 'string | number'.
Type 'undefined' is not assignable to type 'string | number'.

Type 'SourceMap | undefined' is not assignable to type 'SourceMap'.
Type 'undefined' is not assignable to type 'SourceMap'.

Type 'string | null' is not assignable to type 'string | undefined'.
Type 'null' is not assignable to type 'string | undefined'.

Type 'null' is not assignable to type 'Function'.

Type 'null' is not assignable to type 'Map<string, string[]>'.

Type 'null' is not assignable to type 'PrerenderConfig'.

Type 'null' is not assignable to type 'Set'.

Type 'null' is not assignable to type 'HydrateAnchorElement[]'.

Type 'null' is not assignable to type '(prerenderRequest: PrerenderUrlRequest) => Promise'.

Type 'CssNode | null' is not assignable to type 'void | CssNode'.
Type 'null' is not assignable to type 'void | CssNode'.

Type 'CssNode | null' is not assignable to type 'CssNode'.
Type 'null' is not assignable to type 'CssNode'.

Type 'CssNode | null' is not assignable to type 'void | CssNode'.

Type 'RegExpExecArray | null' is not assignable to type 'RegExpExecArray'.
Type 'null' is not assignable to type 'RegExpExecArray'.

Type 'null' is not assignable to type '() => string'.

Type 'null' is not assignable to type 'number'.

Type 'null' is not assignable to type 'boolean'.

Type 'null' is not assignable to type 'boolean | undefined'.

Type 'FsItem | undefined' is not assignable to type 'FsItem'.
Type 'undefined' is not assignable to type 'FsItem'.

Type 'null' is not assignable to type 'CompilerFileWatcherCallback[]'.

Type '(key: string) => string | undefined' is not assignable to type '(key: string) => string'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type '(p: string) => Promise<string | undefined>' is not assignable to type '{ (p: string): Promise; (p: string, encoding: "utf8"): Promise; (p: string, encoding: "binary"): Promise; }'.
Type 'Promise<string | undefined>' is not assignable to type 'Promise'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type '(p: string) => string | undefined' is not assignable to type '(p: string, encoding?: string | undefined) => string'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type '((maxConcurrentWorkers: number) => WorkerMainController) | null' is not assignable to type '((maxConcurrentWorkers: number) => WorkerMainController) | undefined'.
Type 'null' is not assignable to type '((maxConcurrentWorkers: number) => WorkerMainController) | undefined'.

Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'.

Type 'null' is not assignable to type 'Worker'.

Type 'CollectionCompilerMeta | undefined' is not assignable to type 'CollectionCompilerMeta'.
Type 'undefined' is not assignable to type 'CollectionCompilerMeta'.

Type 'DeclarationName | undefined' is not assignable to type 'DeclarationName'.
Type 'undefined' is not assignable to type 'DeclarationName'.

Type 'boolean | null' is not assignable to type 'boolean'.
Type 'null' is not assignable to type 'boolean'.

Type 'undefined' is not assignable to type 'ComponentCompilerVirtualProperty'.

Type '{ name: string; method: string; bubbles: boolean; cancelable: boolean; composed: boolean; docs: CompilerJsDoc; complexType: ComponentCompilerEventComplexType; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerEvent[]'.
Type '{ name: string; method: string; bubbles: boolean; cancelable: boolean; composed: boolean; docs: d.CompilerJsDoc; complexType: d.ComponentCompilerEventComplexType; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerEvent'.
Types of property 'internal' are incompatible.
Type 'boolean | undefined' is not assignable to type 'boolean'.

Type '{ name: string; docs: CompilerJsDoc; complexType: ComponentCompilerMethodComplexType; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerMethod[]'.
Type '{ name: string; docs: d.CompilerJsDoc; complexType: d.ComponentCompilerMethodComplexType; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerMethod'.
Types of property 'internal' are incompatible.
Type 'boolean | undefined' is not assignable to type 'boolean'.

Type '{ name: string; type: ComponentCompilerPropertyType; attribute: string | undefined; reflect: boolean; mutable: boolean; required: boolean; optional: boolean; defaultValue: string | undefined; complexType: ComponentCompilerPropertyComplexType; docs: CompilerJsDoc; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerProperty[]'.
Type '{ name: string; type: d.ComponentCompilerPropertyType; attribute: string | undefined; reflect: boolean; mutable: boolean; required: boolean; optional: boolean; defaultValue: string | undefined; complexType: d.ComponentCompilerPropertyComplexType; docs: d.CompilerJsDoc; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerProperty'.
Types of property 'internal' are incompatible.
Type 'boolean | undefined' is not assignable to type 'boolean'.

Type 'null' is not assignable to type 'ImportData'.

Type 'undefined' is not assignable to type '"queryparams" | null'.

Type 'null' is not assignable to type 'WeakSet'.

Type 'null' is not assignable to type 'Module'.

Type 'Module | undefined' is not assignable to type 'Module'.
Type 'undefined' is not assignable to type 'Module'.

Type 'undefined' is not assignable to type 'CompilerJsDoc'.

Type '{ [x: string]: d.TypesMemberNameData[] | undefined; }' is not assignable to type 'TypesImportData'.
'string' index signatures are incompatible.
Type 'TypesMemberNameData[] | undefined' is not assignable to type 'TypesMemberNameData[]'.
Type 'undefined' is not assignable to type 'TypesMemberNameData[]'.

Type 'string | undefined' is not assignable to type 'string | null'.

Type '((data: { file: string; line: number; column: number; }) => void) | null' is not assignable to type 'OpenInEditorCallback | undefined'.
Type 'null' is not assignable to type 'OpenInEditorCallback | undefined'.

Type 'null' is not assignable to type 'WebSocket'.

Type 'null' is not assignable to type 'BuildOnEventRemove'.

Type 'null' is not assignable to type '() => void'.

Type 'null' is not assignable to type '(msg: DevServerMessage) => void'.

Type 'DevServerConfig | undefined' is not assignable to type 'DevServerConfig'.
Type 'undefined' is not assignable to type 'DevServerConfig'.

Type 'null' is not assignable to type '{ open(openId: string): Promise; }'.

Type 'string | null' is not assignable to type 'string | undefined'.

Type 'null' is not assignable to type 'Promise<DevServerEditor[]>'.

Type 'null' is not assignable to type '(req: IncomingMessage, res: ServerResponse, next: () => void) => void'.

Type 'null' is not assignable to type 'URL'.

Type 'null' is not assignable to type 'URLSearchParams'.

Type 'PageReloadStrategy | undefined' is not assignable to type 'PageReloadStrategy'.
Type 'undefined' is not assignable to type 'PageReloadStrategy'.

Type 'null' is not assignable to type 'Server<typeof IncomingMessage, typeof ServerResponse>'.

Type 'null' is not assignable to type 'DevWebSocket'.

Type 'null' is not assignable to type 'DevServerContext'.

Type 'DevWebSocket | null' is not assignable to type 'DevWebSocket'.
Type 'null' is not assignable to type 'DevWebSocket'.

Type 'null' is not assignable to type 'ChildProcess'.

Type 'null' is not assignable to type 'HydrateApp'.

Type '() => undefined' is not assignable to type '{ (cb?: (() => void) | undefined): TestServerResponse; (chunk: any, cb?: (() => void) | undefined): TestServerResponse; (chunk: any, encoding: BufferEncoding, cb?: (() => void) | undefined): TestServerResponse; }'.
Type 'undefined' is not assignable to type 'TestServerResponse'.

Type 'null' is not assignable to type 'ComponentConstructor'.

Type '(this: HostElement) => Promise | undefined' is not assignable to type '() => Promise'.
Type 'Promise | undefined' is not assignable to type 'Promise'.
Type 'undefined' is not assignable to type 'Promise'.

Type 'null' is not assignable to type 'Window & typeof globalThis'.
Type 'null' is not assignable to type 'Window'.

Type 'null' is not assignable to type 'Window & typeof globalThis'.

Type 'null' is not assignable to type 'MockCSSStyleSheet'.

Type 'null' is not assignable to type 'string | boolean'.

Type 'null' is not assignable to type 'Location'.

Type 'null' is not assignable to type 'MockElement'.

Type 'null' is not assignable to type 'SVGSVGElement'.

Type 'null' is not assignable to type 'SVGElement'.

Type 'null' is not assignable to type 'EventTarget'.

Type 'null' is not assignable to type 'MockEventListener[]'.

Type 'null' is not assignable to type 'MockDocument'.

Type '{ name: string; value: string; namespace: string | null; prefix: null; }[]' is not assignable to type 'Attribute[]'.
Type '{ name: string; value: string; namespace: string | null; prefix: null; }' is not assignable to type 'Attribute'.
Types of property 'namespace' are incompatible.
Type 'string | null' is not assignable to type 'string | undefined'.

Type '(element: MockElement) => string | null' is not assignable to type '(element: unknown) => string'.
Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Type 'ParentNode | null' is not assignable to type 'Node'.
Type 'null' is not assignable to type 'Node'.

Type 'null' is not assignable to type 'Document'.

Type 'string | null | undefined' is not assignable to type 'string | undefined'.

Type 'never[] | null' is not assignable to type 'RenderNode[]'.
Type 'null' is not assignable to type 'RenderNode[]'.

Type 'null' is not assignable to type 'VNode[]'.

Type 'null' is not assignable to type 'string | number | undefined'.

Type 'null' is not assignable to type 'string | number | Function'.

Type 'RenderNode | null' is not assignable to type 'RenderNode'.
Type 'null' is not assignable to type 'RenderNode'.

Type 'HTMLElement | null' is not assignable to type 'EventTarget'.
Type 'null' is not assignable to type 'EventTarget'.

Type 'string | null | undefined' is not assignable to type 'string | undefined'.
Type 'null' is not assignable to type 'string | undefined'.

Type 'null' is not assignable to type 'Set | undefined'.

Type 'null' is not assignable to type '[string, any][] | undefined'.

Type 'VNode[] | undefined' is not assignable to type 'VNode[]'.
Type 'undefined' is not assignable to type 'VNode[]'.

Type '(props: {}, children: VNode[], utils: FunctionalUtilities) => null' is not assignable to type 'FunctionalComponent<{}>'.
Type 'null' is not assignable to type 'VNode | VNode[]'.

Type '() => null' is not assignable to type 'FunctionalComponent<{}>'.
Type 'null' is not assignable to type 'VNode | VNode[]'.

Type 'null' is not assignable to type 'VNode'.

Type 'undefined' is not assignable to type 'VNode'.

Type 'RenderNode | undefined' is not assignable to type 'RenderNode'.
Type 'undefined' is not assignable to type 'RenderNode'.

Type 'RelocateNodeData | undefined' is not assignable to type 'RelocateNodeData'.
Type 'undefined' is not assignable to type 'RelocateNodeData'.

Type 'ChildNode | null' is not assignable to type 'Node'.
Type 'null' is not assignable to type 'Node'.

Type 'null' is not assignable to type 'ScreenshotBuild'.

Type 'null' is not assignable to type 'ScreenshotCache'.

Type 'null' is not assignable to type 'Buffer'.

Type 'null' is not assignable to type 'Screenshot'.

Type '(() => void) | undefined' is not assignable to type '() => any'.
Type 'undefined' is not assignable to type '() => any'.

Type '() => null' is not assignable to type '(opts: { rootDir: string; moduleId: string; path: string; }) => string'.
Type 'null' is not assignable to type 'string'.

Type '() => null' is not assignable to type '(opts: { moduleId: string; path?: string | undefined; version?: string | undefined; }) => string'.
Type 'null' is not assignable to type 'string'.

Type '() => string | undefined' is not assignable to type '() => string'.
Type 'string | undefined' is not assignable to type 'string'.
Type 'undefined' is not assignable to type 'string'.

Type 'number | null' is not assignable to type 'number'.
Type 'null' is not assignable to type 'number'.

Type 'any[] | undefined' is not assignable to type 'any[]'.
Type 'undefined' is not assignable to type 'any[]'.

Type 'boolean | null | undefined' is not assignable to type 'boolean | undefined'.

Type 'null' is not assignable to type 'ConfigBundle[] | undefined'.

Type 'null' is not assignable to type 'OutputTarget[] | undefined'.

Type 'null' is not assignable to type 'TestingConfig | undefined'.

Type 'null' is not assignable to type 'Cache'.

Type 'null' is not assignable to type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'.

Type 'HostRef | undefined' is not assignable to type 'HostRef'.
Type 'undefined' is not assignable to type 'HostRef'.

Type 'Function | undefined' is not assignable to type 'Function'.
Type 'undefined' is not assignable to type 'Function'.

Type 'RafCallback | undefined' is not assignable to type 'Function'.
Type 'undefined' is not assignable to type 'Function'.

Type 'QueuedLoadModule | undefined' is not assignable to type 'QueuedLoadModule'.
Type 'undefined' is not assignable to type 'QueuedLoadModule'.

Type 'null' is not assignable to type 'ElementHandle'.

Type 'null' is not assignable to type 'E2EPageInternal'.

Type 'ElementHandle | null' is not assignable to type 'ElementHandle'.
Type 'null' is not assignable to type 'ElementHandle'.

Type 'null' is not assignable to type 'Promise<JSHandle>'.

Type '(a?: any, b?: any) => Promise<ScreenshotDiff | undefined>' is not assignable to type '{ (): Promise; (description: string): Promise; (opts: ScreenshotOptions): Promise<...>; (description: string, opts: ScreenshotOptions): Promise<...>; }'.
Type 'Promise<ScreenshotDiff | undefined>' is not assignable to type 'Promise'.
Type 'ScreenshotDiff | undefined' is not assignable to type 'ScreenshotDiff'.
Type 'undefined' is not assignable to type 'ScreenshotDiff'.

Type 'null' is not assignable to type 'CompilerWatcher'.

Type 'null' is not assignable to type 'Promise'.

Type 'Browser | null' is not assignable to type 'Browser'.
Type 'null' is not assignable to type 'Browser'.

Type 'null' is not assignable to type 'ValidatedConfig'.

Type 'null' is not assignable to type 'Browser'.

Type 'null' is not assignable to type 'SourceMap'.

Type 'null' is not assignable to type 'PackageJsonData'.

Type 'null' is not assignable to type '{ [moduleId: string]: string; } | undefined'.
TS18047 167
Error messages 'var1' is possibly 'null'.

'configFileData' is possibly 'null'.

'canonicalLinkElm.parentNode' is possibly 'null'.

'link.parentNode' is possibly 'null'.

'href' is possibly 'null'.

'stencilScriptElm.parentNode' is possibly 'null'.

'attr' is possibly 'null'.

't.cmp' is possibly 'null'.

't.event' is possibly 'null'.

't.property' is possibly 'null'.

'appErrorElm.parentNode' is possibly 'null'.

'progressBar.parentNode' is possibly 'null'.

'serverProcess.stdout' is possibly 'null'.

'serverProcess.stderr' is possibly 'null'.

'node.nodeName' is possibly 'null'.

'element.nodeName' is possibly 'null'.

'nodeValue' is possibly 'null'.

'cloned' is possibly 'null'.

'clonedDiv' is possibly 'null'.

'clonedTemplate' is possibly 'null'.

'clonedTemplate.content.firstChild' is possibly 'null'.

'clonedTemplate.content.firstChild.textContent' is possibly 'null'.

'clonedWin' is possibly 'null'.

'titleElm' is possibly 'null'.

'doc.body.firstElementChild' is possibly 'null'.

'doc.body.firstElementChild.firstElementChild' is possibly 'null'.

'tmplElm.content.firstChild' is possibly 'null'.

'doc.firstElementChild' is possibly 'null'.

'doc.lastChild' is possibly 'null'.

'dstWin' is possibly 'null'.

'orgLocationNode.parentNode' is possibly 'null'.

'node.nodeValue' is possibly 'null'.

'node.parentNode' is possibly 'null'.

'appendAfter.parentNode' is possibly 'null'.

'hostElm.firstElementChild' is possibly 'null'.

'hostElm.lastElementChild' is possibly 'null'.

'nodeRef.nodeValue' is possibly 'null'.

'nodeRef.parentNode' is possibly 'null'.

'parentNode' is possibly 'null'.

'defaultHolder.parentNode' is possibly 'null'.

'nodeToRelocate.parentNode' is possibly 'null'.

'w' is possibly 'null'.

'elm.textContent' is possibly 'null'.

'rsp' is possibly 'null'.

'p.params' is possibly 'null'.

'head' is possibly 'null'.
TS2532 61
Error messages Object is possibly 'undefined'.
TS2454 46
Error messages Variable 'pkgJsonData' is used before being assigned.

Variable 'minifyOpts' is used before being assigned.

Variable 'workerCtrl' is used before being assigned.

Variable 'timespan' is used before being assigned.

Variable 'content' is used before being assigned.

Variable 'compilerExe' is used before being assigned.

Variable 'outputText' is used before being assigned.

Variable 'importResolvedFile' is used before being assigned.

Variable 'win' is used before being assigned.

Variable 'attrName' is used before being assigned.

Variable 'oldValue' is used before being assigned.

Variable 'newValue' is used before being assigned.

Variable 'hostId' is used before being assigned.

Variable 'promise' is used before being assigned.

Variable 'textContent' is used before being assigned.

Variable 'resolve' is used before being assigned.

Variable 'opts' is used before being assigned.
TS2722 41
Error messages Cannot invoke an object which is possibly 'undefined'.
TS2531 37
Error messages Object is possibly 'null'.
TS2352 19
Error messages Conversion of type 'null' to type 'CompilerSystem' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.

Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.

Conversion of type 'null' to type 'string[]' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.

Conversion of type '{ cmps: never[]; }' to type 'Module' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
Type '{ cmps: never[]; }' is missing the following properties from type 'Module': coreRuntimeApis, collectionName, dtsFilePath, excludeFromCollection, and 27 more.

Conversion of type 'null' to type 'ScreenshotCache' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
TS2769 12
Error messages No overload matches this call.
Overload 1 of 2, '(type: keyof DocumentEventMap, listener: (this: Document, ev: PointerEvent | MouseEvent | UIEvent | Event | ErrorEvent | ... 13 more ... | WheelEvent) => any, options?: boolean | ... 1 more ... | undefined): void', gave the following error.
Argument of type '"e"' is not assignable to parameter of type 'keyof DocumentEventMap'.
Overload 2 of 2, '(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions | undefined): void', gave the following error.
Argument of type 'null' is not assignable to parameter of type 'EventListenerOrEventListenerObject'.

No overload matches this call.
Overload 1 of 2, '(o: {}): string[]', gave the following error.
Argument of type 'BuildResultsComponentGraph | undefined' is not assignable to parameter of type '{}'.
Type 'undefined' is not assignable to type '{}'.
Overload 2 of 2, '(o: object): string[]', gave the following error.
Argument of type 'BuildResultsComponentGraph | undefined' is not assignable to parameter of type 'object'.
Type 'undefined' is not assignable to type 'object'.

No overload matches this call.
Overload 1 of 4, '(object: {}, method: never): SpyInstance<never, never>', gave the following error.
Argument of type 'CompilerWorkerContext | undefined' is not assignable to parameter of type '{}'.
Type 'undefined' is not assignable to type '{}'.
Overload 2 of 4, '(object: {}, method: never): SpyInstance<never, never>', gave the following error.
Argument of type 'CompilerWorkerContext | undefined' is not assignable to parameter of type '{}'.
Type 'undefined' is not assignable to type '{}'.

No overload matches this call.
The last overload gave the following error.
Argument of type 'string | null' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'.
Type 'null' is not assignable to type '(substring: string, ...args: any[]) => string'.

No overload matches this call.
The last overload gave the following error.
Argument of type 'string | undefined' is not assignable to parameter of type 'string | RegExp'.
Type 'undefined' is not assignable to type 'string | RegExp'.

No overload matches this call.
Overload 1 of 2, '(configFileName: string, optionsToExtend: CompilerOptions | undefined, system: System, createProgram?: CreateProgram | undefined, reportDiagnostic?: DiagnosticReporter | undefined, reportWatchStatus?: WatchStatusReporter | undefined, watchOptionsToExtend?: WatchOptions | undefined, extraFileExtensions?: readonly FileExtensionInfo[] | undefined): WatchCompilerHostOfConfigFile<...>', gave the following error.
Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
Type 'undefined' is not assignable to type 'string'.
Overload 2 of 2, '(rootFiles: string[], options: CompilerOptions, system: System, createProgram?: CreateProgram | undefined, reportDiagnostic?: DiagnosticReporter | undefined, reportWatchStatus?: WatchStatusReporter | undefined, projectReferences?: readonly ProjectReference[] | undefined, watchOptions?: WatchOptions | undefined): WatchCompilerHostOfFilesAndCompilerOptions<...>', gave the following error.
Argument of type 'string | undefined' is not assignable to parameter of type 'string[]'.
Type 'undefined' is not assignable to type 'string[]'.

No overload matches this call.
Overload 1 of 2, '(timeoutId: string | number | Timeout | undefined): void', gave the following error.
Argument of type 'Timeout | null' is not assignable to parameter of type 'string | number | Timeout | undefined'.
Type 'null' is not assignable to type 'string | number | Timeout | undefined'.
Overload 2 of 2, '(id: number | undefined): void', gave the following error.
Argument of type 'Timeout | null' is not assignable to parameter of type 'number | undefined'.
Type 'null' is not assignable to type 'number | undefined'.

No overload matches this call.
Overload 1 of 2, '(timeoutId: string | number | Timeout | undefined): void', gave the following error.
Argument of type 'Timeout | null' is not assignable to parameter of type 'string | number | Timeout | undefined'.
Overload 2 of 2, '(id: number | undefined): void', gave the following error.
Argument of type 'Timeout | null' is not assignable to parameter of type 'number | undefined'.

No overload matches this call.
Overload 1 of 3, '(p: string, encoding: "utf8"): Promise', gave the following error.
Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
Type 'undefined' is not assignable to type 'string'.
Overload 2 of 3, '(p: string, encoding: "binary"): Promise', gave the following error.
Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
Type 'undefined' is not assignable to type 'string'.

No overload matches this call.
Overload 1 of 2, '(values: [] | readonly unknown[]): Promise<unknown[] | []>', gave the following error.
Argument of type 'Promise[] | undefined' is not assignable to parameter of type '[] | readonly unknown[]'.
Type 'undefined' is not assignable to type '[] | readonly unknown[]'.
Overload 2 of 2, '(values: Iterable<void | PromiseLike>): Promise<void[]>', gave the following error.
Argument of type 'Promise[] | undefined' is not assignable to parameter of type 'Iterable<void | PromiseLike>'.
Type 'undefined' is not assignable to type 'Iterable<void | PromiseLike>'.
TS2790 10
Error messages The operand of a 'delete' operator must be optional.
TS2538 8
Error messages Type 'undefined' cannot be used as an index type.

Type 'null' cannot be used as an index type.
TS2344 5
Error messages Type 'T' does not satisfy the constraint 'Answers'.
TS2416 4
Error messages Property 'get' in type 'Cache' is not assignable to the same property in base type 'Cache'.
Type '(key: string) => Promise<string | null>' is not assignable to type '(key: string) => Promise'.
Type 'Promise<string | null>' is not assignable to type 'Promise'.
Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Property 'getMemoryStats' in type 'Cache' is not assignable to the same property in base type 'Cache'.
Type '() => string | null' is not assignable to type '() => string'.
Type 'string | null' is not assignable to type 'string'.
Type 'null' is not assignable to type 'string'.

Property 'find' in type 'E2EElement' is not assignable to the same property in base type 'E2EElementInternal'.
Type '(selector: string) => Promise<E2EElement | null>' is not assignable to type '(selector: FindSelector) => Promise'.
Type 'Promise<E2EElement | null>' is not assignable to type 'Promise'.
Type 'E2EElement | null' is not assignable to type 'E2EElement'.
Type 'null' is not assignable to type 'E2EElement'.

Property 'findAll' in type 'E2EElement' is not assignable to the same property in base type 'E2EElementInternal'.
Type '(selector: string) => Promise<E2EElement[]>' is not assignable to type '(selector: FindSelector) => Promise<E2EElement[]>'.
Type 'Promise<import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement[]>' is not assignable to type 'Promise<import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement[]>'.
Type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement[]' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement[]'.
Type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement'.
The types returned by 'find(...)' are incompatible between these types.
Type 'Promise<E2EElement | null>' is not assignable to type 'Promise'.
TS18049 3
Error messages 'scriptElm' is possibly 'null' or 'undefined'.
TS2493 3
Error messages Tuple type '[]' of length '0' has no element at index '0'.
TS2488 2
Error messages Type 'Diagnostic[] | undefined' must have a 'Symbol.iterator' method that returns an iterator.

Type 'string[] | undefined' must have a 'Symbol.iterator' method that returns an iterator.
TS2774 2
Error messages This condition will always return true since this function is always defined. Did you mean to call it instead?
TS2684 1
Error messages The 'this' context of type 'ResolveIdHook | undefined' is not assignable to method's 'this' of type 'Function'.
Type 'undefined' is not assignable to type 'Function'.
TS2464 1
Error messages A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
TS2430 1
Error messages Interface 'SerializeOpts' incorrectly extends interface 'SerializeCssOptions'.
Types of property 'usedSelectors' are incompatible.
Type 'UsedSelectors | null' is not assignable to type 'UsedSelectors | undefined'.
Type 'null' is not assignable to type 'UsedSelectors | undefined'.

Unused exports report

There are 10 unused exports on this PR. That's the same number of errors on main, so at least we're not creating new ones!

Unused exports
File Line Identifier
src/runtime/bootstrap-lazy.ts 15 setNonce
src/screenshot/screenshot-fs.ts 18 readScreenshotData
src/testing/testing-utils.ts 186 withSilentWarn
src/compiler/app-core/app-data.ts 3 BUILD
src/compiler/app-core/app-data.ts 88 Env
src/compiler/app-core/app-data.ts 90 NAMESPACE
src/compiler/fs-watch/fs-watch-rebuild.ts 111 updateCacheFromRebuild
src/testing/platform/testing-platform.ts 29 cssVarShim
src/testing/puppeteer/puppeteer-declarations.ts 513 WaitForEventOptions
src/client/polyfills/css-shim/utils.ts 1 GLOBAL_SCOPE

@rwaskiewicz rwaskiewicz force-pushed the rwaskiewicz/ts-reload-bug-for-stencil-v2 branch from 33567aa to bc2729b Compare March 13, 2023 21:05
@rwaskiewicz
fix(compiler): use file system polling events in watch mode (#4146)
e009e9c 
this commit updates stencil to use the polling-based file watcher that
was used prior to the typescript 4.9 upgrade. in ts 4.9, the ts compiler
was updated to use filesystem events. since then, we've received reports
of fs events not playing nicely with certain development environments.
for this reason, we revert back to the polling based implementation.
@rwaskiewicz rwaskiewicz force-pushed the rwaskiewicz/ts-reload-bug-for-stencil-v2 branch from bc2729b to e009e9c Compare March 14, 2023 12:09
@rwaskiewicz rwaskiewicz marked this pull request as ready for review March 14, 2023 12:11
@rwaskiewicz rwaskiewicz requested a review from a team as a code owner March 14, 2023 12:11
tanner-reits
tanner-reits approved these changes Mar 14, 2023
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Looks good!

alicewriteswrongs
alicewriteswrongs approved these changes Mar 14, 2023
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lgtm!

@rwaskiewicz rwaskiewicz merged commit 7f3d514 into v2-maintenance Mar 14, 2023
@rwaskiewicz rwaskiewicz deleted the rwaskiewicz/ts-reload-bug-for-stencil-v2 branch March 14, 2023 14:37
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@tanner-reits tanner-reits tanner-reits approved these changes

@alicewriteswrongs alicewriteswrongs alicewriteswrongs approved these changes

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@rwaskiewicz @alicewriteswrongs @tanner-reits