mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Andrew Clark
1b55ad2a4b
API for batching top-level updates and deferring the commit. - `root.createBatch` creates a batch with an async expiration time associated with it. - `batch.render` updates the children that the batch renders. - `batch.then` resolves when the root has completed. - `batch.commit` synchronously flushes any remaining work and commits. No two batches can have the same expiration time. The only way to commit a batch is by calling its `commit` method. E.g. flushing one batch will not cause a different batch to also flush.
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.
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://facebook.github.io/jest/blog/2016/07/27/jest-14.html.