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swc transpiler does not set strictMode
to match tsconfig
#1531
Comments
Do you think this is a strict mode issue? E.g swc is enabling strict mode when you expect it to be disabled, or vice versa? I'm referring specifically to https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode, not to TypeScripts's "strict" option which is a different thing. What does this do?
|
Ah ofcourse, yes indeed, it's the global object, |
Ok, looks we do not pass the ts-node/src/transpilers/swc.ts Lines 85 to 90 in bc03a3e
We should be explicitly setting this option to match whatever your typescript config indicates, so that you'll get the same behavior with both compilers. I've renamed this issue to describe the underlying problem, which helps keep track of implementing a fix. Re the I also have this idea to add a flag that is specifically for inspecting the compiled output of a single file at a time, for debugging situations like this: #1366 |
strictMode
to match tsconfig
It never seems to emit for me, regardless of the options
Personally, I think I'd still use just |
If you think |
@Janpot What is your tsconfig? There are various options which affect "use strict" and I want to make sure I understand your project configuration 100%. Thank you in advance. I did a bit of research here. Your script above is a special case. I expect that most node scripts, even standalone ones, will have at least one import, for example swc is not as nuanced as TS. We can either tell it to always emit use strict, or never emit. Given this limitation of swc, I'm going to pragmatically assume that all node scripts have an import or export, and set swc's options accordingly. If a user really really needs to avoid strict mode, they will likely have |
Nevermind... of course you included your tsconfig at the top, doh! |
This was originally discovered in a repo that was transitioning from js to ts. all the imports were |
Thanks, good to understand the context. I think the implementation we settled on is the best we can do, given that swc's configuration is a bit more limited than tsc's. |
This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [ts-node](https://typestrong.org/ts-node) ([source](https://github.com/TypeStrong/ts-node)) | devDependencies | minor | [`10.4.0` -> `10.5.0`](https://renovatebot.com/diffs/npm/ts-node/10.4.0/10.5.0) | --- ### Release Notes <details> <summary>TypeStrong/ts-node</summary> ### [`v10.5.0`](https://github.com/TypeStrong/ts-node/releases/v10.5.0) [Compare Source](TypeStrong/ts-node@v10.4.0...v10.5.0) <!-- I don't make a discussion thread for every release. Github has a button to make a discussion thread for a release. Then I update the discussion thread to remove the release notes and instead link to the release. --> Questions about this release? Ask in the official discussion thread: [#​1634](TypeStrong/ts-node#1634) **Added** - Eliminate "Emit Skipped" errors ([#​693](TypeStrong/ts-node#693), [#​1345](TypeStrong/ts-node#1345), [#​1629](TypeStrong/ts-node#1629)) - Avoids all "Emit Skipped" errors by performing a fallback `transpileOnly`-style transformation. - Does not affect typechecking. Type errors are still detected and thrown. - Fallback has the same limitations as `isolatedModules`. This will only affect rare cases such as using `const enums` with `preserveConstEnums` disabled. - Fixes [#​693](TypeStrong/ts-node#693) - Graduate swc transpiler out of experimental; add `swc: true` convenience option ([docs](https://typestrong.org/ts-node/docs/transpilers)) ([#​1487](TypeStrong/ts-node#1487), [#​1536](TypeStrong/ts-node#1536), [#​1613](TypeStrong/ts-node#1613), [#​1627](TypeStrong/ts-node#1627)) - `"swc": true` or `--swc` will use swc for faster execution - This feature is no longer marked "experimental." Thank you to everyone who filed bugs! - swc transpiler attempts to load `@swc/core` or `@swc/wasm` dependencies from your project before falling-back to global installations ([#​1613](TypeStrong/ts-node#1613), [#​1627](TypeStrong/ts-node#1627)) - global fallback only occurs when using a global installation of ts-node - Add support for TypeScript's `traceResolution` output ([docs](https://www.typescriptlang.org/tsconfig/#traceResolution)) ([#​1128](TypeStrong/ts-node#1128), [#​1491](TypeStrong/ts-node#1491)) [@​TheUnlocked](https://github.com/TheUnlocked) - Support import assertions in ESM loader ([docs](https://nodejs.org/dist/latest-v17.x/docs/api/esm.html#import-assertions)) ([#​1557](TypeStrong/ts-node#1557), [#​1558](TypeStrong/ts-node#1558), [#​1559](TypeStrong/ts-node#1559), [#​1573](TypeStrong/ts-node#1573)) [@​Pokute](https://github.com/Pokute), [@​geigerzaehler](https://github.com/geigerzaehler) - Allows importing JSON files from ESM with the requisite flag ([docs](https://nodejs.org/dist/latest-v17.x/docs/api/esm.html#json-modules)) - `ts-node -vvv` also logs absolute paths to `ts-node` and `typescript`, to make it more obvious when you're accidentally using globally-installed versions ([#​1323](TypeStrong/ts-node#1323), [#​1620](TypeStrong/ts-node#1620)) - Add swc target "es2022" ([#​1535](TypeStrong/ts-node#1535), [#​1540](TypeStrong/ts-node#1540)) - When you have target es2022 in tsconfig, will use swc's es2022 target **Changed** - Initialize TypeScript compiler before starting REPL prompt ([#​1498](TypeStrong/ts-node#1498)) [@​TheUnlocked](https://github.com/TheUnlocked) - Improves responsiveness for first line of REPL input - Use `v8-compile-cache-lib` to load typescript - improves startup time ([#​1339](TypeStrong/ts-node#1339), [#​1603](TypeStrong/ts-node#1603)) - Support both `--camelCase` and `--hyphen-case` for all CLI flags; update documentation to use `--camelCase` ([#​1598](TypeStrong/ts-node#1598), [#​1599](TypeStrong/ts-node#1599)) - Not a breaking change; CLI continues to accept both forms - Make `TSError` `diagnosticText` property non-enumerable to prevent it from being logged below the stack ([#​1632](TypeStrong/ts-node#1632)) **Fixed** - Fix [#​1538](TypeStrong/ts-node#1538): REPL inputs fail to transpile via swc ([#​1538](TypeStrong/ts-node#1538), [#​1541](TypeStrong/ts-node#1541), [#​1602](TypeStrong/ts-node#1602)) - Fix [#​1478](TypeStrong/ts-node#1478): REPL erroneously logged `undefined` for all inputs after the first when using swc transpiler ([#​1478](TypeStrong/ts-node#1478), [#​1580](TypeStrong/ts-node#1580), [#​1602](TypeStrong/ts-node#1602)) - Fix [#​1389](TypeStrong/ts-node#1389): In `--showConfig` output, emit accurate `moduleTypes` paths resolved relative to the `tsconfig.json` which declared them ([#​1389](TypeStrong/ts-node#1389), [#​1619](TypeStrong/ts-node#1619)) - Fix: Remove indentation from `ts-node --help` output ([#​1597](TypeStrong/ts-node#1597), [#​1600](TypeStrong/ts-node#1600)) - Fix [#​1425](TypeStrong/ts-node#1425): Merged definitions correctly into `tsconfig.schemastore-schema.json` ([#​1425](TypeStrong/ts-node#1425), [#​1618](TypeStrong/ts-node#1618)) - Fix: Allow disabling `"use strict"` emit in SWC transpiler ([#​1531](TypeStrong/ts-node#1531), [#​1537](TypeStrong/ts-node#1537)) - Fix: Add missing `ERR_UNKNOWN_FILE_EXTENSION` constructor; was throwing `ERR_UNKNOWN_FILE_EXTENSION is not a constructor` ([#​1562](TypeStrong/ts-node#1562)) [@​bluelovers](https://github.com/bluelovers) - Fix [#​1565](TypeStrong/ts-node#1565): entrypoint resolution failed on node v12.0.x and v12.1.x ([#​1565](TypeStrong/ts-node#1565), [#​1566](TypeStrong/ts-node#1566)) [@​davidmurdoch](https://github.com/davidmurdoch) #### Docs - Explain `env -S` flag for shebangs ([docs](https://typestrong.org/ts-node/docs/usage#shebang)) ([#​1448](TypeStrong/ts-node#1448), [#​1545](TypeStrong/ts-node#1545)) [@​sheeit](https://github.com/sheeit), [@​chee](https://github.com/chee) - Suggest `skipIgnore` when you want to compile files in node_modules ([docs](https://typestrong.org/ts-node/docs/how-it-works)) ([#​1553](TypeStrong/ts-node#1553)) [@​webstrand](https://github.com/webstrand) - Fix typo in `moduleTypes` on options page ([docs](https://typestrong.org/ts-node/docs/options)) ([#​1630](TypeStrong/ts-node#1630), [#​1633](TypeStrong/ts-node#1633)) #### Misc - Adds experimental `experimentalResolverFeatures` option, but it does not do anything yet ([#​1514](TypeStrong/ts-node#1514), [#​1614](TypeStrong/ts-node#1614)) https://github.com/TypeStrong/ts-node/milestone/4 </details> --- ### Configuration 📅 **Schedule**: At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox. --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). Co-authored-by: cabr2-bot <[email protected]> Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1156 Reviewed-by: crapStone <[email protected]> Co-authored-by: Calciumdibromid Bot <[email protected]> Co-committed-by: Calciumdibromid Bot <[email protected]>
Search Terms
swc
Expected Behavior
Running
using
will print
(this is what is printed without using
swc
)Actual Behavior
an error is printed:
Specifications
The text was updated successfully, but these errors were encountered: