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da6ba53b10
In React 19 React will finally stop publishing UMD builds. This is motivated primarily by the lack of use of UMD format and the added complexity of maintaining build infra for these releases. Additionally with ESM becoming more prevalent in browsers and services like esm.sh which can host React as an ESM module there are other options for doing script tag based react loading. This PR removes all the UMD build configs and forks. There are some fixtures that still have references to UMD builds however many of them already do not work (for instance they are using legacy features like ReactDOM.render) and rather than block the removal on these fixtures being brought up to date we'll just move forward and fix or removes fixtures as necessary in the future. |
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react-refresh
This package implements the wiring necessary to integrate Fast Refresh into bundlers. Fast Refresh is a feature that lets you edit React components in a running application without losing their state. It is similar to an old feature known as "hot reloading", but Fast Refresh is more reliable and officially supported by React.
This package is primarily aimed at developers of bundler plugins. If you’re working on one, here is a rough guide for Fast Refresh integration using this package.