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feat(gatsby): Support React 17's new JSX Transform #26652

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merged 17 commits into from Aug 28, 2020

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blainekasten
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@blainekasten blainekasten commented Aug 27, 2020

Description

React has a new JSX transformation setup. See the blog post here.

Dan Abramov and Luna Ruan from the React core team reached out and asked if we could add support for it and that is what this PR does!

To test it out you can install gatsby@jsx-transform

From initial tests, if you have React 17 installed in your gatsby project, you are able to omit the classic import React from 'react' statement with this new transform. And if you use React 16, the old functionality of requiring that import is still in place.

Future:

  • Eventually this feature will be backported and most of this code will be removable and we can just set the babel option to runtime: automatic all the time

Documentation

This really shouldn't matter for the end user. It's just a code transformation optimization.

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@gatsbot gatsbot bot added the status: triage needed Issue or pull request that need to be triaged and assigned to a reviewer label Aug 27, 2020
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@wardpeet wardpeet changed the title feat(gatsby) Support React 17's new JSX Transform feat(gatsby): Support React 17's new JSX Transform Aug 27, 2020
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Cool, thanks Blaine! Left a few comments

packages/gatsby-cli/package.json Outdated Show resolved Hide resolved
packages/gatsby/src/utils/webpack-utils.ts Outdated Show resolved Hide resolved
packages/babel-preset-gatsby/src/index.js Outdated Show resolved Hide resolved
packages/gatsby/src/utils/webpack-utils.ts Outdated Show resolved Hide resolved
@wardpeet wardpeet added topic: frontend Relates to frontend issues (e.g. reach/router, gatsby-link, page-loading, asset-loading, navigation) status: awaiting author response Additional information has been requested from the author and removed status: triage needed Issue or pull request that need to be triaged and assigned to a reviewer labels Aug 27, 2020
@blainekasten blainekasten removed the status: awaiting author response Additional information has been requested from the author label Aug 27, 2020
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Neat! Nice work, I fixed some review things myself to get it merged.

@wardpeet wardpeet added the bot: merge on green Gatsbot will merge these PRs automatically when all tests passes label Aug 28, 2020
@gatsbybot gatsbybot merged commit 6ba68f8 into master Aug 28, 2020
@delete-merged-branch delete-merged-branch bot deleted the react/jsx-transform-v17 branch August 28, 2020 08:22
@marcobiedermann
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Great work!
I just tested this in my Gatsby project using TypeScript but it looks like this feature is missing there: gatsby-plugin-typescript

@italodeandra
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@marcobiedermann I noticed the same thing.

@blainekasten Do you have any suggestion? We might be able to contribute.

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5 participants