源地址：http://rfyiamcool.blog.51cto.com/1030776/1278620
代码示例：
<!DOCTYPE html>
<html>
<head>
<title>Handlebars Expressions Example</title>
</head>
<body>
<h1>Handlebars Expressions Example!</h1>
<!--this is a list which will rendered by handlebars template. -->
<div id="list">
</div> <script type="text/javascript" src=\'#\'" /jquery.js"></script>
<script type="text/javascript" src=\'#\'" /handlebars-1.0.0.beta.6.js"></script> <script id="people-template" type="text/x-handlebars-template">
{{#people}}
<div class="person">
<h2>{{first_name}} {{last_name}}</h2>
<div class="phone">{{phone}}</div>
<div class="email"><a href="mailto:{{email}}">{{email}}</a></div>
<div class="since">User since {{member_since}}</div>
</div>
{{/people}}
</script> <script type="text/javascript">
$(document).ready(function() { // compile our template
var template = Handlebars.compile($("#people-template").html()); var data = {
people: [
{ first_name: "rui", last_name: "fengyun", phone: "1234567890", email: "alan@test.com", member_since: "Mar 25, 2011" },
{ first_name: "Allison", last_name: "House", phone: "0987654321", email: "allison@test.com", member_since: "Jan 13, 2011" },
{ first_name: "Nick", last_name: "Pettit", phone: "9836592272", email: "nick@test.com", member_since: "Apr 9, 2009" },
{ first_name: "Jim", last_name: "Hoskins", phone: "7284927150", email: "jim@test.com", member_since: "May 21, 2010" },
{ first_name: "Ryan", last_name: "Carson", phone: "8263729224", email: "ryan@test.com", member_since: "Nov 1, 2008" }
]
}; $('#list').html(template(data));
});
</script>
</body>
</html>
进行遍历里面的数据，print出来
<script id="each-template" type="text/x-handlebars-template">
{{#each people}}
... output person's info here...
{{/each}}
</script>
有数据的话，进行数据渲染
<script id="each-template" type="text/x-handlebars-template">
{{#if people}}
... output person's info here...
{{/if}}
</script>
没有数据的话，就写没有数据
<script id="each-template" type="text/x-handlebars-template">
{{#unless people.length}}
There aren't any people.
{{/unless}}
</script>
if else 关联的判断
<script id="each-template" type="text/x-handlebars-template">
{{#if people.length}}
... output person's info here...
{{else}}
There aren't any people.
{{/if}}
</script>