Backbone.View.Extend没有显示任何内容

Question

嗨，我对backbone.js很新，我只想弄清楚它是如何工作的。我正在使用bootstrap for UI和backbone.js来添加功能。但是，以下骨干视图未显示任何内容。如果我在任何地方都错了，请纠正我。

<script type="text/template" id="login-template">
<nav class="navbar navbar-inverse navbar-fixed-top">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">SwipteIt</a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <form class="navbar-form navbar-right">
        <div class="form-group">
          <input type="text" placeholder="Email" class="form-control" id="LoginEmail">
        </div>
        <div class="form-group">
          <input type="password" placeholder="Password" class="form-control" id="LoginPassword">
        </div>
        <button type="submit" class="btn btn-success" id="loginButton" >Sign in</button>
        <div class="form-group">
          <a href="signup.html"><span class="glyphicon glyphicon-user"></span> Sign Up</a>
        </div>
      </form>
    </div><!--/.navbar-collapse -->
  </div>
</nav>
</script>


var LogInView = Backbone.View.extend({
events: {
  "click #loginButton": "logIn",
//  "submit form.signup-form": "signUp"
},

el: ".content",

initialize: function() {
  _.bindAll(this, "logIn");
  this.render();
},

logIn: function(e) {
    alert("hello world");
  // return false;
},

render: function() {
  this.$el.html(_.template($("#login-template").html()));
}
});

new LogInView();