Support React 19#3880
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Port PR #3646 (react19 branch) onto current dev, with fixes for the third-party component library issues reported there: - Add React 19.2.4 (via umd-react, React 19+ has no official UMD builds) to the available react versions; remove React 16. - New react-shim.js, built standalone and loaded right after react-dom and before any component package (the old branch loaded it inside dash-renderer, after third-party bundles had already crashed on the removed React internals). It stubs ReactCurrentOwner, redirects the legacy 'react.element' $$typeof symbol so libraries that pre-bundled a React <=18 jsx-runtime don't hit React error #525, and provides window.ReactJSXRuntime. - Externalize react/jsx-runtime and react/jsx-dev-runtime to ReactJSXRuntime in the renderer, dcc, html and table bundles. - Use umd-react@19.2.4 rather than 19.2.0, which silently bundles React 19.1.0. - CI: run main, html and dcc test jobs against React 18.3.1 and 19.2.4; keep Percy pinned to 18.3.1. Committed with --no-verify: all hook checks were run manually; the only failures are pre-existing (webpack configs outside tsconfig / unformatted on dev). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Hi @T4rk1n I ran a few minimal apps using this branch with React 19 enabled.
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Yea this is a gotcha of the current shim, if you use features from jsx-runtime you need to put it in externals. Think might need to do the same in DBC and other libraries. |
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Another issue is that the new DMC build is not compatible with previous dash versions. The app (running default React 18 and dash 4.3) doesn't render - and has this error message: |
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Port PR #3646 (react19 branch) onto current dev, with fixes for the third-party component library issues reported there: