将角度从 6.1 更新到 8.2

Question

在从 angular 6 更新到 8 时，我收到以下消息。

ng -v 给出以下结果，

节点 12.16.1
角度 6.1.2
打字稿 3.6.4

我正在运行命令，ng update @angular/cli@8 @angular/core@8

packageGroup metadata of package @angular/cli is malformed. Ignoring.
packageGroup metadata of package @angular/cli is malformed.
packageGroup metadata of package @angular/cli is malformed. Ignoring.
packageGroup metadata of package @angular/cli is malformed. Ignoring.
packageGroup metadata of package @angular/cli is malformed.
packageGroup metadata of package @angular/cli is malformed. Ignoring.
packageGroup metadata of package @angular/cli is malformed. Ignoring.
.3.1 || >=4.0.0-beta <6.0.0" (extended), would install "8.2.14").
              Package "codelyzer" has an incompatible peer dependency to "@angular/core" (requires 
"^2.3.1 || >=4.0.0-beta <6.0.0" (extended), would install "8.2.14").
              Package "codelyzer" has an incompatible peer dependency to "@angular/platform-browser" 
(requires "^2.3.1 || >=4.0.0-beta <6.0.0" (extended), would install "8.2.14").
              Package "codelyzer" has an incompatible peer dependency to "@angular/common" (requires 
"^2.3.1 || >=4.0.0-beta <6.0.0" (extended), would install "8.2.14").
              Package "codelyzer" has an incompatible peer dependency to "@angular/platform-browser- 
dynamic" (requires "^2.3.1 || >=4.0.0-beta <6.0.0" (extended), would install "8.2.14").
              Package "@angular/compiler-cli" has an incompatible peer dependency to "typescript" 
(requires ">=3.4 <3.6", would install "3.6.4")

Answer 1

从 Angular 6 到 Angular 9，我尝试：

@angular/cli@7 @angular/core@7
npm audit fix
npm i @angular/forms@9.1.9
npm i @angular/platform-browser@9.1.9
npm i @angular/platform-browser-dynamic@9.1.9
npm i @angular/core@9.1.9
npm i @angular/compiler@9.1.9
npm i @angular/common@9.1.9

@angular/cli @angular/core