在 Backbone Js 中将数据传递到视图在浏览器中看不到

Passing Data to Views in Backbone Js does not see in the browser

本文关键字：看不到 视图 浏览器 数据 Backbone Js      更新时间：2023-09-26

我刚刚开始我的骨干教程，在第一次作业中，我必须在页面上显示一亮的ul。 我编写了以下代码，浏览器没有显示任何错误，但也没有在屏幕上显示列表。有人可以检查我的代码，我做错的地方。

    <!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <title>Pass Data to Views</title>
</head>
<body>
  <!-- ========= -->
  <!-- Your HTML -->
  <!-- ========= -->
  <ul id="songs"></ul>
  <!-- ========= -->
  <!-- Libraries -->
  <!-- =========
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
  <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js" type="text/javascript"></script>
  <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js" type="text/javascript"></script>
  <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone-localstorage.js/1.0/backbone.localStorage-min.js" type="text/javascript"></script>  -->
  <script src="js/jquery.min.js" type="text/javascript"></script>
  <script src="js/underscore-min.js" type="text/javascript"></script>
  <script src="js/backbone-min.js" type="text/javascript"></script>
  <script src="js/backbone.localStorage-min.js" type="text/javascript"></script>
  <!-- =============== //
  <!-- Javascript code -->
  <!-- =============== -->
  <script type="text/javascript">
// Model
var Song = Backbone.Model.extend();
// Collection : just a group of Models
var Songs = Backbone.Collection.extend({
  model: Song
});
// View
var SongView = Backbone.View.extend({
  tagName: "li",
  render: function(){
    this.$el.html(this.model.get("title"));
    return this;
  }
});
var SongsView = Backbone.View.extend({
  render: function(){
    var self = this;
    this.model.each(function(song){
      var songView = new SongView({ model: song });
      self.$el.append(songView.render().$el);
    });
  }
});

// Adding Data to Models.
var songs = new Songs([
  new Song({title: "This is title One"}),
  new Song({title: "This is Title Two"}),
  new Song({title: "This is title third"})
]);
var Object_SongsView = new SongsView({el: "songs", model: songs});
Object_SongsView.render();
  </script>
</body>
</html>

视图应该像这样创建（注意#在 songs 的 CSS 选择器前面

）： 
var Object_SongsView = new SongsView({
    el: "#songs",
    model: songs
});
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