从 Angular 2 升级 Angular 4 后出现错误

Question

从 Angular2 升级到 Angular4 后，我在 CLI 中遇到这些错误。虽然升级后我的应用程序仍在运行，但我只是想知道如何或是否可以解决这些错误。有什么想法吗？

Package.json 升级前：

{
  "name": "myapp",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "^2.4.0",
    "@angular/compiler": "^2.4.0",
    "@angular/core": "^2.4.0",
    "@angular/forms": "^2.4.0",
    "@angular/http": "^2.4.0",
    "@angular/platform-browser": "^2.4.0",
    "@angular/platform-browser-dynamic": "^2.4.0",
    "@angular/router": "^3.4.0",
    "core-js": "^2.4.1",
    "foundation-sites": "^6.3.1",
    "ng2-translate": "^5.0.0",
    "rxjs": "^5.1.0",
    "zone.js": "^0.7.6"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0-rc.1",
    "@angular/compiler-cli": "^2.4.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.4.2",
    "typescript": "~2.0.0"
  }
}

Package.json 升级后：

{
  "name": "myapp",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.0.0",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/platform-server": "^4.0.0",
    "@angular/router": "^4.0.0",
    "core-js": "^2.4.1",
    "foundation-sites": "^6.3.1",
    "ng2-translate": "^5.0.0",
    "rxjs": "^5.1.0",
    "typescript": "^2.2.2",
    "zone.js": "^0.7.6"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0-rc.1",
    "@angular/compiler-cli": "^2.4.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.4.2",
    "typescript": "~2.0.0"
  }
}

Answer 1

您升级了 @angular 库，但没有升级所需的依赖项。我建议你使用 npm-check-updates。这是升级 package.json 中所有依赖项的最简单方法。试试这个：

步骤 1. 安装 npm-check-updates:

npm i -g npm-check-updates

步骤 2. 升级所有依赖项：

npm-check-updates -u

@EDIT: 或最新版本 npm-check-updates:

ncu -a

步骤 3. 安装升级依赖项：

npm install

Answer 2

尝试将编译器 CLI 升级到 ^4.0.0:

您的编译器仍然是 2.4.0 版本：

"@angular/compiler-cli": "^2.4.0",

注意：如果您想知道您的 package.json 应该是什么样子，您可以创建一个新项目 ng new test-project --skip-install 并检查 package.json。

从 Angular 2 升级 Angular 4 后出现错误

Errors after Angular 4 upgrade from Angular 2

upgrade

npm

typescript

angular4

angular