Just like Web and the entire web ecosystem, Angular is continuously improving. Angular balances continuous improvement with a strong focus on stability and making updates easy. Keeping your Angular app up-to-date enables you to take advantage of leading-edge new features, as well as optimizations and bug fixes.
就像 Web 及其整个生态系统一样，Angular 也在持续改进中。Angular 平衡了持续改进与强调稳定性之间的冲突，努力让升级变得更简单。让 Angular 应用始终保持最新，可以让你获得前沿的新特性所带来的好处，还有各种优化和 Bug 修复。
This document contains information and resources to help you keep your Angular apps and libraries up-to-date.
本文档包含一些信息和资源，来帮助你持续更新 Angular 的应用和库。
For information about our versioning policy and practices—including
support and deprecation practices, as well as the release schedule—see [Angular versioning and releases](guide/releases "Angular versioning and releases").
If you are currently using AngularJS, see [Upgrading from AngularJS](guide/upgrade "Upgrading from Angular JS"). _AngularJS_ is the name for all v1.x versions of Angular.
To be notified when new releases are available, follow [@angular](https://twitter.com/angular "@angular on Twitter") on Twitter or subscribe to the [Angular blog](https://blog.angular.io "Angular blog").
What's new? What's changed? We share the most important things you need to know on the Angular blog in [release announcements]( https://blog.angular.io/tagged/release%20notes "Angular blog - release announcements").
有什么新特性？有哪些变化？我们会在 Angular 官方博客的[发布声明]( https://blog.angular.io/tagged/release%20notes "Angular blog - release announcements")中和你共享那些最重要的信息。
To review a complete list of changes, organized by version, see the [Angular change log](https://github.com/angular/angular/blob/master/CHANGELOG.md "Angular change log").
To check your app's version of Angular: From within your project directory, use the `ng version` command.
要检查你的应用的 Angular 版本，就到项目目录下执行 `ng version` 命令。
{@a checking-version-angular}
## Finding the current version of Angular
## 查看 Angular 的当前版本
The most recent stable released version of Angular appears in the [Angular documentation](https://angular.io/docs "Angular documentation") at the bottom of the left side navigation. For example, `stable (v5.2.9)`.
You can also find the most current version of Angular by using the [CLI command `ng update`](https://github.com/angular/angular-cli/wiki/update "Angular CLI update documentation"). By default, `ng update` (without additional arguments) lists the updates that are available to you.
The Angular Update Guide provides customized update instructions, based on the current and target versions that you specify. It includes basic and advanced update paths, to match the complexity of your applications. It also includes troubleshooting information and any recommended manual changes to help you get the most out of the new release.
For simple updates, the [CLI command `ng update`](https://github.com/angular/angular-cli/wiki/update "Angular CLI update documentation") is all you need. Without additional arguments, `ng update` lists the updates that are available to you and provides recommended steps to update your application to the most current version.
* Release announcements: [Angular blog - release announcements](https://blog.angular.io/tagged/release%20notes "Angular blog announcements about recent releases")
发布声明：[Angular 博客 - 发布声明](https://blog.angular.io/tagged/release%20notes "Angular blog announcements about recent releases")
* Release announcements (older): [Angular blog - announcements about releases prior to August 2017](https://blog.angularjs.org/search?q=available&by-date=true "Angular blog announcements about releases prior to August 2017")
发布声明（旧的）：[Angular 博客 - 2017 年 8 月以前的](https://blog.angularjs.org/search?q=available&by-date=true "Angular blog announcements about releases prior to August 2017")
