mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Jack Pope
38327309a4
Reverting some of https://github.com/facebook/react/pull/27804 which renamed this option to stable. This PR just replaces internal usage to make upcoming PRs cleaner. Keeping isConcurrent unstable for the next major release in order to enable a broader deprecation of RTR and be consistent with concurrent rendering everywhere for next major. (https://github.com/facebook/react/pull/28498) - Next major will use concurrent root - The old behavior (legacy root by default, concurrent root with unstable option) will be preserved for React Native until new architecture is fully shipped. - Flag and legacy root usage can be removed after RN dependency is unblocked without an additional breaking change
react-test-renderer
This package provides an experimental React renderer that can be used to render React components to pure JavaScript objects, without depending on the DOM or a native mobile environment.
Essentially, this package makes it easy to grab a snapshot of the "DOM tree" rendered by a React DOM or React Native component without using a browser or jsdom.
Documentation:
https://reactjs.org/docs/test-renderer.html
Usage:
const ReactTestRenderer = require('react-test-renderer');
const renderer = ReactTestRenderer.create(
<Link page="https://www.facebook.com/">Facebook</Link>
);
console.log(renderer.toJSON());
// { type: 'a',
// props: { href: 'https://www.facebook.com/' },
// children: [ 'Facebook' ] }
You can also use Jest's snapshot testing feature to automatically save a copy of the JSON tree to a file and check in your tests that it hasn't changed: https://jestjs.io/blog/2016/07/27/jest-14.html.