Angular 2.3.1 发布了，Angular 是一款十分流行且好用的 Web 前端框架，目前由 Google 维护。

更新内容：

性能改进

• animations: always run the animation queue outside of zones

Bug 修复：

• animations: always cleanup players after they have finished internally

• animations: throw errors and normalize offset beyond the range of 0,1, 

• compiler: emit quoted object literal keys if the source is quoted

• compiler: fix merge error in compiler_host 

• compiler: fix PR 13322

• compiler: fix simplify a reference without a name

• compiler: fix transpiled ES5 code

• compiler: generated CSS files suffixed with ngstyle

• compiler: make sure provider values with name property don’t break

• compiler: narrow the span reported for invalid pipes

• compiler: propagate exports when upgrading metadata to v2

• compiler: resolver should merge host bindings and listeners

• compiler: support dotted property binding

• compiler: update to metadata version 3 

• core: detectChanges() doesn't work on detached instance

• core: properly destroy embedded Views attatched to ApplicationRef

• core: remove logError from logGroup

• forms: ensure select[multiple] retains selections

• forms: fix Validators.min/maxLength with FormArray

• forms: introduce checkbox required validator

• http: check response body text against undefined

• http: create a copy of headers when merge options

• language-service: correctly type undefined

• compiler: better error when directive not listed in NgModule.declarations

• language-service: treat string unions as strings

• router: add support for query params with multiple values

• router: Use T type in Resolve interface

• selector: SelectorMatcher match elements with :not selector

• tsc-wrapped: generate metadata for exports without module specifier

• upgrade: fix downgrade content projection and injector inheritance (86c5098)

• upgrade: enable Angular 1 unit testing of upgrade module 

下载地址：

• Source code (zip)

• Source code (tar.gz)