angular - 单版本更新 Angular

Question

我必须将 Angular 7.x 项目更新到 Angular 8.2.0，因此我在线阅读了ng update。

我的全局 Angular 版本等于我的更新目标版本 (8.2.0)，但 ng update 强制我更新到最新版本。

Your global Angular CLI version (8.2.0) is greater than your local
version (7.3.5). The local Angular CLI version is used.

To disable this warning use "ng config -g cli.warnings.versionMismatch false".
    We analyzed your package.json, there are some packages to update:

      Name                                      Version                  Command to update
     ---------------------------------------------------------------------------------------
      @angular/cdk                              7.3.3 -> 13.3.1          ng update @angular/cdk
      @angular/cli                              7.3.5 -> 13.3.0          ng update @angular/cli
      @angular/core                             7.2.8 -> 13.3.0          ng update @angular/core
      @angular/core                             7.2.8 -> 7.2.16          ng update @angular/core
      @angular/fire                             5.1.1 -> 7.3.0           ng update @angular/fire
      @angular/material                         7.3.3 -> 13.3.1          ng update @angular/material
      @nguniversal/aspnetcore-engine            7.1.1 -> 8.2.6           ng update @nguniversal/aspnetcore-engine
      @nguniversal/express-engine               7.1.1 -> 13.1.0          ng update @nguniversal/express-engine
      @ngx-i18nsupport/tooling                  1.1.2 -> 8.0.3           ng update @ngx-i18nsupport/tooling
      ng-mocks                                  7.7.0 -> 13.3.0          ng update ng-mocks


    There might be additional packages that are outdated.
    Run "ng update --all" to try to update all at the same time.

有没有办法使用ng update --all来做到这一点？我必须使用 Angular update guide ？

我也尝试过 ng update @angular/cli --from="7.3.5"--to="8.2.0" 但它不起作用。

                  Package "@angular-devkit/build-ng-packagr" has an incompatible peer dependency to "ng-packagr" (requires "^2.2.0 || ^3.0.0 || ^4.0.0", would install "13.3.0").
                  Package "codelyzer" has an incompatible peer dependency to "@angular/core" (requires ">=2.3.1 <8.0.0 || >7.0.0-beta <8.0.0" (extended), would install "13.3.0").
                  Package "ng-mocks" has an incompatible peer dependency to "@angular/forms" (requires ">=5.x <=7.x" (extended), would install "13.3.0").
                  Package "codelyzer" has an incompatible peer dependency to "@angular/compiler" (requires ">=2.3.1 <8.0.0 || >7.0.0-beta <8.0.0" (extended), would install "13.3.0").
                  Package "@angular/http" has an incompatible peer dependency to "@angular/platform-browser" (requires "7.2.8" (extended), would install "13.3.0").
                  Package "@ismaestro/ngx-example-library" has an incompatible peer dependency to "@angular/common" (requires "^6.0.0-rc.0 || ^6.0.0" (extended), would install "13.3.0").
                  Package "@angular/fire" has an incompatible peer dependency to "@angular/platform-browser-dynamic" (requires ">=6.0.0 <8" (extended), would install "13.3.0").
                  Package "@nguniversal/express-engine" has an incompatible peer dependency to "@angular/platform-server" (requires "^7.1.4" (extended), would install "13.3.0").
                  Package "tsickle" has an incompatible peer dependency to "typescript" (requires "~3.3.1", would install "4.6.3").
                  Package "@angular/fire" has an incompatible peer dependency to "zone.js" (requires "^0.8.0", would install "0.11.5").
                  Package "@angular/http" has an incompatible peer dependency to "rxjs" (requires "^6.0.0", would install "7.5.5").```

Answer 1

这是因为当您执行 ng update 时，您并未定义特定版本。 您应该使用类似 ng update @angular/core@10 @angular/cli@10 等...

不建议在一次更新中从 Angular 7 升级到 Angular 13，而是应该逐个版本地升级，例如:

• Angular 7 -> Angular 8，
• Angular 8 -> Angular 9.1

遵循此 Angular 更新指南，应该没问题，底部有每次更新前应执行的具体说明 https://update.angular.io/