Angular 5.2.0-beta.1 和 5.1.2 已发布，5.2.0-beta.1 主要是新增了一些特性和修复 bug，5.1.2 主要是修复了部分 bug，具体如下： 5.2.0-beta.1 Bug 修复 compiler: generate the correct imports for summary type-check (d91ff17) forms: avoid producing an error with hostBindingTypeCheck (d213a20) 特性 compiler: allow ngIf to use the ngIf expression directly as a guard (82bcd83) router: add "paramsInheritanceStrategy" router configuration option (5efea2f), closes #20572 5.1.2 Bug 修复 common: fix a Closure compilation issue. (267ebf3) compiler: make tsx file aot compatible (756dd34), closes #20555 compiler: report an error for recursive module references (ced575f) compiler-cli: do not emit invalid .metadata.json files (a1d4c2d) compiler-cli: do not force type checking on .js files (3b63e16) service-worker: check for updates on navigation (a33182c), closes #20877 upgrade: replaces get/setAngularLib with get/setAngularJSGlobal (66cc2fa) 详情请参阅更新日志地址。 源码下载：https://github.com/angular/angular/releases Angular 5.2.0-beta.1 和 5.1.2 发布，Web 前端框架下载地址
