Question

所以参考我在这里Google Maps Javascript V3 Uncaught TypeError: Cannot read property 'offsetWidth' of null的原始问题，经过大量的谷歌搜索，我找到了一个我认为可行的解决方案，即How to append multiple Google Maps areas to divs using Handlebars。

但是，我已按以下方式实施了我的

var EmployeeView = function(employee){
  this.render = function(){
    $('body').append(this.el);
      // inside the new div, put the Handlebars template, with the data from the employee
      this.el.html(EmployeeView.template(employee)).ready( function() {
        var mapOptions = {
          center: new google.maps.LatLng(-34.397, 150.644),
          zoom: 8
        };
        var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
      });
      return this;
    };

    this.initialize = function(){
      this.el=$("</div>");
      window.localStorage.removeItem('paramId');
      console.log('removed');
      window.localStorage.setItem('paramId',employee);
      console.log('added ' + employee.id);    
    };
    this.initialize();
  }

EmployeeView.template = Handlebars.compile($("#employee-tpl").html());

不确定这是否是“引用”该解决方案的正确方法，但现在，每当我运行该页面时，都会抛出以下错误Uncaught ReferenceError: context is not defined

有人有任何想法吗？并添加，我的HTML如下

<body>
<script id="employee-tpl" type="text/x-handlebars-template">
  <div class='details'>
    <img class='employee-image' src='img/{{firstName}}_{{lastName}}.jpg' />
    <ul>
      <li><a href="#map/{{this.id}}">See on map</a></li>         
      <li>Share with friends</li>
      <li><div id="map-canvas"/></li>
    </ul>
  <script src="lib/iscroll.js"></script>
  <script src="lib/handlebars.js"></script>
  <script src="lib/jquery-1.8.2.min.js"></script>
  <script src="js/storage/cafe-memory-store.js"></script>
  <script type="text/javascript" src="http://maps.google.com/maps/api/js?APIKEY&sensor=true"></script> 
  <script src="js/MapView.js"></script>
  <script src="js/EmployeeView.js"></script>
  <script src="js/HomeView.js"></script>
  <script src="js/main.js"></script>
</body>

Answer 1

在这一行：

$("employee-tpl").append(HTMLtemplate(context))

您正在传递undefined个函数和一个undefined变量（context）。 context应包含您在HandlebarJS模板中定义的要更换的id参数

<a href="#map/{{this.id}}">See on map</a>

在您的情况下，

HTMLTemplate是EmployeeView.template，其中包含HandlebarJS编译模板：它是一个函数，它接收context变量（或者employee变量作为参数？）

如果我说得对，你的代码应该是：

var EmployeeView = function(employee){

  this.render = function(){
    $('body').append(this.el);
    // inside the new div, put the Handlebars template, with the data from the employee
    this.el.html(EmployeeView.template(employee))).ready( function() {
        var mapOptions = {
        center: new google.maps.LatLng(-34.397, 150.644),
        zoom: 8

        };
        var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
    });


    return this;
  };



  this.initialize = function(){
    this.el=.$("</div>");
    window.localStorage.removeItem('paramId');
    console.log('removed');
    window.localStorage.setItem('paramId',employee);
    console.log('added ' + employee.id);    
  };
  this.initialize();


}

EmployeeView.template = Handlebars.compile($("#employee-tpl").html());

我认为您必须将employee传递给模板，因为我在模板中看到了first_name和last_name。

上下文未定义JavaScript

1 个答案: