如何在我的角度应用程序中安装underscore.js？

Question

我使用yo-angular生成带有bootstrap/grunt/bower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中我调用underscore.js只是为了看它是否有效:

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,我在控制台中获得了这个错误:

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app config:'use strict';

/**
 * @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>

这导致与上述相同的错误.还得到一个404 for the underscore.js ?? 这是一个咕噜咕噜的配置问题还是其他什么？

Answer 1

我倾向于只为这类事物使用常数.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.

用凉亭安装:

bower install underscore --save

在角度之前加载库:

<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(app/scripts/app.js例如):

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

然后在你的控制器/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');
});

Answer 2

创建一个具有模块名称的underscore模块,然后您可以在您的应用程序中传递它,它将是可访问的.目前,下划线模块未定义,因此您得到了这个错误.

你的应用就像这样:

    var underscore = angular.module('underscore', []);
        underscore.factory('_', function() {
            return window._; //Underscore should be loaded on the page
        });

       angular
      .module('yomanApp', [
        'ngAnimate',
        'ngCookies',
        'ngResource',
        'ngRoute',
        'ngSanitize',
        'ngTouch',
        'underscore'

      ])
      .config(function ($routeProvider) {
        $routeProvider
          .when('/', {
            templateUrl: 'views/main.html',
            controller: 'MainCtrl'
          })
          .when('/about', {
            templateUrl: 'views/about.html',
            controller: 'AboutCtrl'
          })
          .when('/accordeon', {
            templateUrl: 'views/accordeon.html',
            controller: 'IssuesCtrl'
          })
          .otherwise({
            redirectTo: '/'
          });
      })
.controller('MainCtrl', function ($scope, _) {
    $scope.awesomeThings = [
      'HTML5 Boilerplate',
      'AngularJS',
      'AngularJS'
    ];

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