我在学主干.js http://backbonejs.org/我还处于起步阶段。我想通过添加模板下划线 http://underscorejs.org/#template模板方法,但它对我不起作用。我搜索了这个错误,但无法自行修复。如果没有显示模板,我该如何继续。需要一些帮助。
这是代码(该代码来自addyosmani的书backbone-fundamentals):
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>testing</title>
</head>
<body>
<script src="scripts/jquery.js"></script>
<script src="scripts/underscore.js"></script>
<script src="scripts/backbone.js"></script>
<script>
var TodoView = Backbone.View.extend({
tagName: 'li',
// Cache the template function for a single item.
todoTpl: _.template( $('#item-template').html() ),
events: {
'dblclick label': 'edit',
'keypress .edit': 'updateOnEnter',
'blur .edit': 'close'
},
// Re-render the titles of the todo item.
render: function() {
this.$el.html( this.todoTpl( this.model.toJSON() ) );
this.input = this.$('.edit');
return this;
},
edit: function() {
// executed when todo label is double clicked
},
close: function() {
// executed when todo loses focus
},
updateOnEnter: function( e ) {
// executed on each keypress when in todo edit mode,
// but we'll wait for enter to get in action
}
});
var todoView = new TodoView();
// logs reference to a DOM element that cooresponds to the view instance
console.log(todoView.el);
如果模板是在脚本之后定义的,它将不起作用。
将你的入口点包装成
$(function(){
var todoView = new TodoView();
});
所以你不会得到这种错误。
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