angularjs - 如何在我的 Angular 应用程序中安装 underscore.js？

Question

我使用 yo-angular 通过 bootstrap/grunt/bower 生成我的 angularjs 模板。我还想在应用程序中使用下划线:

npm install underscore --save-dev

在 MainCtrl 我调用 underscore.js 只是为了看看它是否有效:

angular.module('yomanApp')
  .controller('MainCtrl', function ($scope) {
    $scope.awesomeThings = [
      'HTML5 Boilerplate',
      'AngularJS',
      'AngularJS'
    ];

    _.each([1,2,3],console.log);
  });

当我使用 Chrome 运行应用程序时，我在控制台中得到了这个 errmsg:

ReferenceError: _ is not defined
    at new <anonymous> (http://localhost:9000/scripts/controllers/main.js:18:5)
    at invoke (http://localhost:9000/bower_components/angular/angular.js:4203:17)
    at Object.instantiate (http://localhost:9000/bower_components/angular/angular.js:4211:27)
    at http://localhost:9000/bower_components/angular/angular.js:8501:28
    at link (http://localhost:9000/bower_components/angular-route/angular-route.js:975:26)
    at invokeLinkFn (http://localhost:9000/bower_components/angular/angular.js:8258:9)
    at nodeLinkFn (http://localhost:9000/bower_components/angular/angular.js:7768:11)
    at compositeLinkFn (http://localhost:9000/bower_components/angular/angular.js:7117:13)
    at publicLinkFn (http://localhost:9000/bower_components/angular/angular.js:6996:30)
    at $get.boundTranscludeFn (http://localhost:9000/bower_components/angular/angular.js:7135:16) <div ng-view="" class="ng-scope">

在此错误之后，我将模块添加到应用程序配置中:
'使用严格';

/**
 * @ngdoc overview
 * @name yomanApp
 * @description
 * # yomanApp
 *
 * Main module of the application.
 */
angular
  .module('yomanApp', [
    'ngAnimate',
    'ngCookies',
    'ngResource',
    'ngRoute',
    'ngSanitize',
    'ngTouch',
    'underscore'

  ])
  .config(function ($routeProvider) {
    $routeProvider
      .when('/', {
        templateUrl: 'views/main.html',
        controller: 'MainCtrl'
      })
      .when('/about', {
        templateUrl: 'views/about.html',
        controller: 'AboutCtrl'
      })
      .when('/accordeon', {
        templateUrl: 'views/accordeon.html',
        controller: 'IssuesCtrl'
      })
      .otherwise({
        redirectTo: '/'
      });
  });

现在我收到此错误:

Uncaught Error: [$injector:modulerr] Failed to instantiate module yomanApp due to:
Error: [$injector:modulerr] Failed to instantiate module underscore due to:
Error: [$injector:nomod] Module 'underscore' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.

我尝试的最后一件事是将它添加到 index.html:

<script src="node_modules/underscore/underscore.js"></script>

这会导致与上述相同的错误。还为 underscore.js 获得 404？这是一个咕噜咕噜的配置问题还是其他什么？

Answer 1

我倾向于只对这种类型的事物使用常量。这是一种简单的方法，允许您在应用程序中明确声明您的依赖项。

用 bower 安装:

bower install underscore --save

在 Angular 之前加载库:

<script src="bower_components/underscore/underscore.js"></script>
<script src="bower_components/angular/angular.js"></script>
<script src="app/scripts/app.js"></script>

将其定义为常量(例如在 app/scripts/app.js 中):

application.constant('_',
    window._
);

然后在您的 Controller /服务中:

application.controller('Ctrl', function($scope, _) {
    //Use underscore here like any other angular dependency
    var stooges = [{name: 'moe', age: 40}, {name: 'larry', age: 50}, {name: 'curly', age: 60}];
    $scope.names = _.pluck(stooges, 'name');
});