This folder exists for React contributors only.
If you use React, you don't need to worry about it.

These fixtures verify that the built React distributions are usable in different environments.
They are not running automatically. (At least not yet. Feel free to contribute to automate them.)

Run them when you make changes to how we package React and ReactDOM.

First, build React and the fixtures:

cd react
npm run build
node fixtures/packaging/build-all.js

Then run a local server, e.g.

npx pushstate-server .

and open the following URL in your browser: http://localhost:9000/fixtures/packaging/index.html

You should see two things:

• A number of iframes (corresponding to various builds), with "Hello World" rendered in each iframe.
• No errors in the console.