如何在Angular CLI中更新Angular 2

Question

如何更新Angular 2版本？我使用的是Angular CLI 1.0.0-beta.20-4，我尝试了npm update --save，但它似乎没有起作用。

以下是我的package.json文件。非常感谢您的帮助。

{
  "name": "todo1",
  "version": "0.0.0",
  "license": "MIT",
  "angular-cli": {},
  "scripts": {
    "start": "ng serve",
    "lint": "tslint \"src/**/*.ts\"",
    "test": "ng test",
    "pree2e": "webdriver-manager update",
    "e2e": "protractor"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "2.2.1",
    "@angular/compiler": "2.2.1",
    "@angular/core": "2.2.1",
    "@angular/forms": "2.2.1",
    "@angular/http": "2.2.1",
    "@angular/material": "^2.0.0-alpha.11-3",
    "@angular/platform-browser": "2.2.1",
    "@angular/platform-browser-dynamic": "2.2.1",
    "@angular/router": "3.0.0",
    "@types/hammerjs": "^2.0.33",
    "@types/lodash": "^4.14.43",
    "angular2-jwt": "^0.1.25",
    "angular2-uuid": "^1.1.0",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "lodash": "^4.17.2",
    "material-design-icons": "^3.0.1",
    "rxjs": "5.0.0-beta.12",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.6.23"
  },
  "devDependencies": {
    "@types/hammerjs": "^2.0.33",
    "@types/jasmine": "^2.2.30",
    "angular-cli": "^1.0.0-beta.20-4",
    "codelyzer": "~0.0.26",
    "jasmine-core": "2.4.1",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.2.1",
    "protractor": "4.0.5",
    "ts-node": "1.2.1",
    "tslint": "3.13.0",
    "typescript": "2.0.2"
  }
}

- Ka Tech

Answer 1

您可以将 @angular 版本更改为使用插入符号范围，这样 NPM 将安装最新的软件包，直到下一个主要版本发布。

  "dependencies": {
    "@angular/common": "^2.2.1",
    "@angular/compiler": "^2.2.1",
    "@angular/core": "^2.2.1",
    "@angular/forms": "^2.2.1",
    "@angular/http": "^2.2.1",

同时，更新到最新的angular-cli版本也是值得的。请参见这里获取指令。

- JayChase

Answer 2

您在这里面临的主要问题是npm update仅会更新到package.json中指定的最高版本限制下的每个模块的最新兼容版本。

最安全的方法是将您的package.json更新为次要和补丁部分使用通配符。Angular 2（与angular 1相对）使用semVer（http://semver.org/），因此您可以安全地使用通配符来代替次要和补丁部分。

"@angular/common": "2.*.*",
"@angular/compiler": "2.*.*",
"@angular/core": "2.*.*",
"@angular/forms": "2.*.*",
"@angular/http": "2.*.*",
"@angular/material": "^2.0.0-alpha.11-3",
"@angular/platform-browser": "2.*.*",
"@angular/platform-browser-dynamic": "2.*.*",
"@angular/router": "3.0.0",

运行 npm update / npm install 命令，然后您应该进行升级。

- Peter Grainger