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Update compilerOptions.jsx to reflect latest preferences #2994

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merged 3 commits into from
Jul 8, 2024
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Update compilerOptions.jsx to reflect latest preferences #2994

merged 3 commits into from
Jul 8, 2024

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eps1lon
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@eps1lon eps1lon commented Dec 9, 2023 •
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react-jsx makes the most sense as a default.

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TODO: PR changing default in TypeScript actual.

The default in TS is undefined, so I'm not sure there's an actual code change needed there besides potentially changing a diagnostic to suggestion one choice over another.

(Additionally, other runtimes than React I believe still use that setting so I doubt it's going to be deprecated in TS)

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Are the discussions for this somewhere that can be linked?

@eps1lon eps1lon changed the title Document new compilerOptions.jsx default Update compilerOptions.jsx to reflect latest preferences Dec 12, 2023
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eps1lon commented Dec 12, 2023

The default in TS is undefined, so I'm not sure there's an actual code change needed there besides potentially changing a diagnostic to suggestion one choice over another.

Yeah, I tried it on a fresh project and you need to specify a value. You can't just run tsc --jsx. So all we need to do is document that there is no default and then we discuss in the React team whether people should prefer react-jsx or react-jsxdev if they have a single tsconfig.json.

eps1lon
eps1lon commented Dec 12, 2023
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packages/tsconfig-reference/copy/en/options/jsx.md Outdated
export const HelloWorld = () => <h1>Hello world</h1>;
```

React 17 dev transform: `"react-jsxdev"`<sup>[[1]](https://reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html)</sup>

Legacy runtime: `"react"`
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Make sure this is language we want to use.

@eps1lon eps1lon marked this pull request as ready for review December 26, 2023 10:04
@jakebailey jakebailey closed this Jun 5, 2024
@jakebailey jakebailey reopened this Jun 5, 2024
@jakebailey jakebailey assigned jakebailey and unassigned jakebailey Jun 5, 2024
@jakebailey jakebailey added the deploy-preview Enables automatic deployments to preview environments on a PR label Jun 5, 2024
eps1lon
eps1lon commented Jun 5, 2024
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I think #3064 composes with this?

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eps1lon commented Jun 6, 2024 •
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This one is more focused and can land separately though, no?

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Close-reopening to verify CI after changes in the repo.

@jakebailey jakebailey closed this Jul 8, 2024
@jakebailey jakebailey reopened this Jul 8, 2024
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@jakebailey jakebailey merged commit 8417ff5 into microsoft:v2 Jul 8, 2024
@eps1lon eps1lon deleted the jsx-default branch July 8, 2024 17:19
This was referenced Apr 16, 2025
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@jakebailey jakebailey jakebailey approved these changes

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