React 19 support

[martinjagodic]

Make Decap work with React 19

[eoneill]

I think once the ESM build is fixed (#7358), decap-cms-app will probably work with React 19.

[fgnass]

As a stop-gap solution, I currently use https://github.com/fgnass/decapp – the main trick is to add the following overrides to package.json:

"overrides": {
  "react": "^19.0.0",
  "react-dom": "^19.0.0",
  "react-scroll-sync": "^0.11.2"
}

[sscaff1]

Any updates on react 19 support? I tried the override workaround, but that didn't seem to work

Edit: I ended up using rollup aliases to temporarily fix my issue:

import alias from '@rollup/plugin-alias';

    alias({
      entries: {
        react: path.resolve(
          __dirname,
          '../../../../node_modules/decap-cms-core/node_modules/react'
        ),
        'react-dom': path.resolve(
          __dirname,
          '../../../../node_modules/decap-cms-core/node_modules/react-dom'
        ),
      },
    }),

Just pointing rollup at react 18 while I'm able to use react 19 everywhere else. This is from a monorepo setup.