npm install显示最新而不是安装包

Question

我在使用npm install时遇到了一些麻烦.

npm install package-name是完美的工作,但当我package.json手动添加一个新的依赖项(通过拉通过git)然后尝试npm install只,它返回

up to date in 4.2 sec 

并且不安装包.

仅供参考:我git用来拉package.json文件.所以包名中没有任何问题.当我拉动并尝试npm install仅安装它时它只是不起作用.

我的package.json是:

{
  "name": "ap",
  "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": "^4.0.0",
    "@angular/compiler": "^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": "^4.1.3",
    "@angular/router": "^4.0.0",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.26",
    "@ngx-translate/core": "^6.0.1",
    "@ngx-translate/http-loader": "0.0.3",
    "@types/underscore": "^1.8.0",
    "angular-datatables": "^4.1.0",
    "angular2-busy": "^2.0.4",
    "angular2-jwt": "^0.2.3",
    "angular2-toaster": "^4.0.0",
    "chart.js": "^2.6.0",
    "core-js": "^2.4.1",
    "datatables.net": "^1.10.15",
    "datatables.net-dt": "^1.10.15",
    "jquery": "^3.2.1",
    "ng2-charts": "^1.5.0",
    "ng2-simple-timer": "^1.3.1",
    "rxjs": "^5.1.0",
    "underscore": "^1.8.3",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/animations": "^4.1.3",
    "@angular/cli": "1.0.4",
    "@angular/compiler-cli": "^4.0.0",
    "@types/datatables.net": "^1.10.1",
    "@types/jasmine": "2.5.38",
    "@types/jquery": "^2.0.45",
    "@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": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0"
  }
}

Answer 1

我在export NODE_ENV=production根据《Modern JavaScript》这本书运行时遇到了这个问题。删除node_modules、package.json并清除npm缓存后并没有解决问题，我从这个stackoverflow条目中找到了答案：npm install won't install devDependency

为了解决这个问题，我运行了export NODE_ENV=删除生产标志的命令。一旦我这样做了，我就能够再次安装开发依赖项。希望这可以帮助。