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fix(runtime): slot regressions from experimental slot fixes #5221

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merged 3 commits into from
Jan 12, 2024

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What is the current behavior?

A few changes made behind the experimentalSlotFixes flag were resulting in screenshot test failures in the Ionic Framework

GitHub Issue Number: N/A

What is the new behavior?

  • Fixes the conditional responsible for patching element methods for the pseudo shadow DOM when experimentalSlotFixes is enabled.
  • Updated the appendChild patch to force a re-render of the patched element

See commit messages for more information

Does this introduce a breaking change?

  • Yes
  • No

Testing

Automated tests

Other information

Nests conditional for applying method patches on scoped components within `experimentalSlotFixes` flag check to avoid applying patches if conditional falls through to `else` block
This commit updates the patched `appendChild` method (for scoped components) to force a re-render on execution. This matches the behavior when using the native implementation
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github-actions bot commented Jan 3, 2024

--strictNullChecks error report

Typechecking with --strictNullChecks resulted in 1219 errors on this branch.

That's the same number of errors on main, so at least we're not creating new ones!

reports and statistics

Our most error-prone files
Path Error Count
src/dev-server/index.ts 37
src/mock-doc/serialize-node.ts 36
src/dev-server/server-process.ts 32
src/compiler/prerender/prerender-main.ts 22
src/testing/puppeteer/puppeteer-element.ts 22
src/runtime/client-hydrate.ts 20
src/screenshot/connector-base.ts 19
src/runtime/vdom/vdom-render.ts 18
src/compiler/config/test/validate-paths.spec.ts 16
src/dev-server/request-handler.ts 15
src/compiler/prerender/prerender-optimize.ts 14
src/compiler/sys/stencil-sys.ts 14
src/compiler/transpile/transpile-module.ts 14
src/sys/node/node-sys.ts 14
src/compiler/prerender/prerender-queue.ts 13
src/compiler/sys/in-memory-fs.ts 13
src/runtime/connected-callback.ts 13
src/runtime/set-value.ts 13
src/compiler/output-targets/output-www.ts 12
src/compiler/transformers/test/parse-vdom.spec.ts 12
Our most common errors
Typescript Error Code Count
TS2345 367
TS2322 365
TS18048 230
TS18047 99
TS2722 37
TS2532 26
TS2531 23
TS2454 14
TS2352 12
TS2790 11
TS2769 8
TS2538 8
TS2344 6
TS2416 6
TS2493 3
TS18046 2
TS2684 1
TS2430 1

Unused exports report

There are 14 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 21 setNonce
src/screenshot/screenshot-fs.ts 18 readScreenshotData
src/testing/testing-utils.ts 198 withSilentWarn
src/utils/index.ts 145 CUSTOM
src/utils/index.ts 269 normalize
src/utils/index.ts 7 escapeRegExpSpecialCharacters
src/compiler/app-core/app-data.ts 25 BUILD
src/compiler/app-core/app-data.ts 115 Env
src/compiler/app-core/app-data.ts 117 NAMESPACE
src/compiler/fs-watch/fs-watch-rebuild.ts 123 updateCacheFromRebuild
src/compiler/types/validate-primary-package-output-target.ts 61 satisfies
src/compiler/types/validate-primary-package-output-target.ts 61 Record
src/testing/puppeteer/puppeteer-declarations.ts 485 WaitForEventOptions
src/compiler/sys/fetch/write-fetch-success.ts 7 writeFetchSuccessSync

@tanner-reits tanner-reits marked this pull request as ready for review January 3, 2024 19:58
@tanner-reits tanner-reits requested a review from a team as a code owner January 3, 2024 19:58
src/runtime/bootstrap-custom-element.ts Show resolved Hide resolved
src/runtime/bootstrap-lazy.ts Show resolved Hide resolved
src/runtime/dom-extras.ts Outdated Show resolved Hide resolved
// Check if there is fallback content that should be hidden
updateFallbackSlotVisibility(this);
return;
// Fore a re-render of the host element
forceUpdate(this);
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Can you help me understand why we need to do force an update here?

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Note: I want a little additional clarification here, after reading the git commit msg

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I ran into an issue when testing this out with Framework screenshot tests. For some components that had appendChild patched, the component would include the append child node after the call until something triggered a re-render of the component (this was as simple as hovering the component). This made it so the component would immediately re-render to reflect the changes and get the tests to pass

@@ -2,6 +2,7 @@ import { Component, h } from '@stencil/core';

@Component({
tag: 'dom-reattach-clone-deep-slot',
scoped: true,
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For my own understanding, why do we need to add scoped to the components in this test suite?

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The test uses the cloneNode method on a Stencil component, but with the changes to the bootstrap methods in this PR, we only patch native methods for scoped components when experimentalSlotFixes is enabled.

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Don't anything in addition to what @rwaskiewicz already pointed out 👍

@tanner-reits tanner-reits added this pull request to the merge queue Jan 12, 2024
Merged via the queue into main with commit 3b4deaa Jan 12, 2024
120 checks passed
@tanner-reits tanner-reits deleted the treits/fix/slot-regressions/runtime-fixes branch January 12, 2024 14:47
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3 participants