RxJS（Reactive Extensions for JavaScript）是一个用于处理异步数据流和事件流的库。它是基于观察者模式和迭代器模式的一种实现，可以帮助开发者更方便地处理复杂的异步操作。
RxJS的核心概念是Observable（可观察对象）。Observable代表一个可观察的数据源，它可以发出多个值，并在完成或出错时终止。开发者可以通过订阅Observable来获取数据流，并使用各种操作符来对数据流进行处理。

RxJS: Reactive Extensions For JavaScript

The Roadmap from RxJS 7 to 8

Curious what's next for RxJS? Follow along with Issue 6367.

RxJS 7

FOR 6.X PLEASE GO TO THE 6.x BRANCH

Reactive Extensions Library for JavaScript. This is a rewrite of Reactive-Extensions/RxJS and is the latest production-ready version of RxJS. This rewrite is meant to have better performance, better modularity, better debuggable call stacks, while staying mostly backwards compatible, with some breaking changes that reduce the API surface.

Apache 2.0 License

• Code of Conduct
• Contribution Guidelines
• Maintainer Guidelines
• API Documentation

Versions In This Repository

• master - This is all of the current work, which is against v7 of RxJS right now
• 6.x - This is the branch for version 6.X

Most PRs should be made to master.

Important

By contributing or commenting on issues in this repository, whether you've read them or not, you're agreeing to the Contributor Code of Conduct. Much like traffic laws, ignorance doesn't grant you immunity.

Installation and Usage

ES6 via npm

npm install rxjs

It's recommended to pull in the Observable creation methods you need directly from 'rxjs' as shown below with range.
If you're using RxJS version 7.2 or above, you can pull in any operator you need from the same spot, 'rxjs'.

import { range, filter, map } from 'rxjs';

range(1, 200)
  .pipe(
    filter(x => x % 2 === 1),
    map(x => x + x)
  )
  .subscribe(x => console.log(x));

If you're using RxJS version below 7.2, you can pull in any operator you need from one spot, under 'rxjs/operators'.

import { range } from 'rxjs';
import { filter, map } from 'rxjs/operators';

range(1, 200)
  .pipe(
    filter(x => x % 2 === 1),
    map(x => x + x)
  )
  .subscribe(x => console.log(x));

CDN

For CDN, you can use unpkg:

https://unpkg.com/rxjs@^7/dist/bundles/rxjs.umd.min.js

The global namespace for rxjs is rxjs:

const { range } = rxjs;
const { filter, map } = rxjs.operators;

range(1, 200)
  .pipe(
    filter(x => x % 2 === 1),
    map(x => x + x)
  )
  .subscribe(x => console.log(x));

Goals

• Smaller overall bundles sizes
• Provide better performance than preceding versions of RxJS
• To model/follow the Observable Spec Proposal to the observable
• Provide more modular file structure in a variety of formats
• Provide more debuggable call stacks than preceding versions of RxJS

Building/Testing

• npm run compile build everything
• npm test run tests
• npm run dtslint run dtslint tests