RxJS 是一个用于编写异步和基于事件的程序的库，具有 可观测值。本仓库包含基于平台的下一代 RxJS 的作品，计划以 RxJS 9 的形式发布。

RxJS 9 目前处于预发布阶段的开发阶段。计划中的第一个测试版是 9.0.0-beta.0，但尚未发布到 npm。next 标签仍然存在 指向早期的RxJS 8预发布版，而RxJS 7仍为生产版 latest线路，并持续维护。

为什么是RxJS 9？RxJS 8发生了什么？

RxJS 8 是真正的工作，不是被跳过的版本。开发多年前就开始了， 在Web平台可观察性提案最终确定期间暂停了。新的 实现是基于平台的生成，而非 暂停了 RxJS 8 分支，因此从版本 9 开始构建架构 断裂的明确，避免将旧的RxJS 8作品呈现为已发布的版本 产品。

RxJS 9 有什么不同？

• RxJS 使用原生网页平台 Observable 安装 只有在必要时才会成为顺从的后备方案。
• RxJS 运算符和工厂是精确的模块拥有符号。它们不会添加 字符串命名为 RxJS 的方法连接到平台 API。

RxJS

RxJS is a library for composing asynchronous and event-based programs with Observable values. This repository contains the platform-based next generation of RxJS, planned for release as RxJS 9.

RxJS 9 is prerelease work in development. The planned first beta is 9.0.0-beta.0, but it has not been published to npm yet. The next tag still points to the earlier RxJS 8 prerelease, while RxJS 7 remains the production latest line and continues to be maintained.

Why RxJS 9? What happened to RxJS 8?

RxJS 8 was real work, not a skipped release. Development began years ago and was paused while the Web Platform Observable proposal was finalized. The new implementation is a platform-based generation rather than a continuation of that paused RxJS 8 branch, so it starts at version 9 to make the architectural break unmistakable and avoid presenting the old RxJS 8 work as the released product.

What is different in RxJS 9?

• RxJS uses the native web-platform Observable when one exists and installs a conforming fallback only when needed.
• RxJS operators and factories are exact, module-owned Symbols. They do not add string-named RxJS methods to the platform API.
• Platform Observable behavior and producer-per-subscription behavior are explicit, separate contracts. Use ColdObservable when each direct