克隆到另一台 PC 后，Angular 无法正常工作

Question

所以我买了一台新电脑，我想通过 github 传递我的 angular 项目。我用了 1. npm i2. npm i @angular/cli@latest -D3.ng update

每次我尝试使用ng s它运行项目时，它都会向我发送此错误：

This version of CLI is only compatible with Angular versions ^9.0.0-beta || >=9.0.0 <10.0.0,
but Angular version 8.2.14 was found instead.

Please visit the link below to find instructions on how to update Angular.
https://angular-update-guide.firebaseapp.com/

我尝试使用链接中的说明。

这是我输入时的 Angular 版本ng --version：

Angular CLI: 9.0.1
Node: 12.16.0

这是 package.json：

{
  "name": "empire-gaming",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular-redux/store": "^10.0.0",
    "@angular/animations": "~8.2.14",
    "@angular/cdk": "~8.2.3",
    "@angular/common": "~8.2.14",
    "@angular/compiler": "~8.2.14",
    "@angular/core": "~8.2.14",
    "@angular/forms": "~8.2.14",
    "@angular/material": "^8.2.3",
    "@angular/platform-browser": "~8.2.14",
    "@angular/platform-browser-dynamic": "~8.2.14",
    "@angular/router": "~8.2.14",
    "@ng-bootstrap/ng-bootstrap": "^5.2.1",
    "@ngrx/store": "^8.6.0",
    "cors": "^2.8.5",
    "express": "^4.17.1",
    "hammerjs": "^2.0.8",
    "mongoose": "^5.8.10",
    "ngx-bootstrap": "^5.3.2",
    "redux": "^4.0.5",
    "rxjs": "~6.4.0",
    "tslib": "^1.10.0",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.803.22",
    "@angular/cli": "^9.0.1",
    "@angular/compiler-cli": "~8.2.14",
    "@angular/language-service": "~8.2.14",
    "@types/jasmine": "~3.3.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "^5.0.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.15.0",
    "typescript": "~3.5.3"
  }
}

我真的对此一无所知......如果你能帮助我，我会很高兴。

Answer 1

您在项目中使用的 Angular 版本低于最新版本的 Angular CLI 所需的版本。我建议您将 Angular CLI 版本降级到 8.3.25

npm uninstall -g @angular/cli
npm cache clean
npm install -g @angular/cli@8.3.25

并在您的 devDependencies 中更改 Angular CLI 的版本：

npm install -D @angular/cli@8.3.25 

Answer 2

第一步全局安装 Angular。

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npm install -g @angular/cli@latest\n

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运行 Update 命令以获取需要升级的所有依赖项的列表。

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ng update\n

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接下来为每个单独的 Angular 核心包运行如下更新命令

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ng update @angular/cli @angular/core\n

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如果您想强制进行更改，请另外使用：\xe2\x80\x93force和\xe2\x80\x93allow-dirtyflags 命令来修复所有其他未决问题。

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ng update @angular/cli @angular/core --allow-dirty --force\n

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