因此，引用我在这里遇到的原始问题 Google Maps Javascript V3 Uncaught TypeError: Cannot read property 'offsetWidth' of null经过大量谷歌搜索后，我找到了一个我认为可行的解决方案，这就是 How to append multiple Google Maps areas to divs using Handlebars 。
但是，我通过以下方式实现了我的
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式，但现在，每当我运行页面时，都会引发以下错误Uncaught ReferenceError:上下文未定义
有人有什么想法吗？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>
最佳答案
在这一行中:
$("employee-tpl").append(HTMLtemplate(context))
您正在传递一个未定义函数和一个未定义变量(上下文)。
context 应包含您在要替换的 HandlebarJS 模板中定义的 id 参数
<a href="#map/{{this.id}}">See on map</a>
HTMLTemplate 是 EmployeeView.template ，它保存 HandlebarJS 编译模板:它是一个接收 context 变量作为参数的函数(或者可能是employee变量？)
如果我没猜错的话，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。
关于javascript - 上下文未定义 JavaScript，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20373278/