jquery tmpl 详解(转)

时间:2014-05-01 05:34:31   收藏:0   阅读:462

动态请求数据来更新页面是现在非常常用的方法,比如博客评论的分页动态加载,微博的滚动加载和定时请求加载等。

 

这些情况下,动态请求返回的数据一般不是已拼好的 HTML 就是 JSON 或 XML,总之不在浏览器端拼数据就在服务器端拼数据。不过,从传输量方面来看,返回 HTML 不划算,而在 web 传输方面,现在更多的是使用 JSON 而不是 XML。

浏览器端根据 JSON 生成 HTML 有个很苦恼的地方就是,结构不复杂的时候还好,结构一复杂,就想死了,需要很小心很小心地写出几乎无法维护的 JavaScript 代码。

因此一些用模版生成HTML的的框架相继出现jquery.tmpl 就是其中的一种,下面我们来详细介绍下jquery.tmpl的用法

jquery.tmpl的几种常用标签分别有:

${}{{each}}{{if}}{{else}}{{html}}

不常用标签

 {{=}},{{tmpl}} and {{wrap}}.

${}等同与{{=}}是输出变量 ${}里面还可以放表达式 (=和变量之间一定要有空格,否则无效

示例:

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<div id="div_demo">
</div>
<script id="demo" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;">
      <span>${ID}</span>
      <span style="margin-left:10px;">{{= Name}}</span>
      <span style="margin-left:10px;">${Number(Num)+1}</span>
      <span style="margin-left:10px;">${Status}</span>
    </div>
</script>
<script type="text/javascript">
  var users = [{ ID: ‘think8848‘, Name: ‘Joseph Chan‘, Num: ‘1‘, Status: 1 }, { ID: ‘aCloud‘, Name: ‘Mary Cheung‘, Num: ‘2‘}];
  $("#demo").tmpl(users).appendTo(‘#div_demo‘);
</script>

  

{{each}} 提供循环逻辑,$value访问迭代变量 也可以自定义迭代变量(i,value)

示例:

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<div id="div_each">
</div>
<script id="each" type="text/x-jquery-tmpl">
    <h3>users</h3>
    {{each(i,user) users}}
        <div>${i+1}:{{= user.name}}</div>
        {{if i==0}}
            <h4>group</h4>
            {{each(j,group) groups}}
                <div>${group.name}</div>
            {{/each}}
        {{/if}}
    {{/each}}
    <h3>depart</h3>
    {{each departs}}
        <div>{{= $value.name}}</div>
    {{/each}}
</script>
<script type="text/javascript">
  var eachData = { users: [{ name: ‘jerry‘ }, { name: ‘john‘}], groups: [{ name: ‘mingdao‘ }, { name: ‘meihua‘ }, { name: ‘test‘}], departs: [{ name: ‘IT‘}] };
  $("#each").tmpl(eachData).appendTo(‘#div_each‘);
</script>

  

{{if }} {{else}}提供了分支逻辑 {{else}} 相当于else if

示例:

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<div id="div_ifelse"></div>
<script id="ifelse" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;"><span>${ID}</span><span style="margin-left:10px;">{{= Name}}</span>
        {{if Status}}
            <span>Status${Status}</span>
        {{else App}}
            <span>App${App}</span>
        {{else}}
            <span>None</span>
        {{/if}}
    </div>
</script>
<script type="text/javascript">
  var users = [{ ID: ‘think8848‘, Name: ‘Joseph Chan‘, Status: 1, App: 0 }, { ID: ‘aCloud‘, Name: ‘Mary Cheung‘, App: 1 }, { ID: ‘bMingdao‘, Name: ‘Jerry Jin‘}];
    $("#ifelse").tmpl(users).appendTo(‘#div_ifelse‘);
</script>

  

{{html}} 输出变量html,但是没有html编码,适合输出html代码

 实例

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<div id="div_html"></div>
<script id="html" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;">
    <span>${ID}</span>
    <span style="margin-left:10px;">{{= Name}}</span>
      ${html}
      {{html html}}
    </div>
</script>
<script type="text/javascript">
  var user = { ID: ‘think8848‘, Name: ‘Joseph Chan‘, html: ‘<button>html</button>‘ };
   $("#html").tmpl(user).appendTo(‘#div_html‘);
</script>

  

{{tmpl}} 嵌套模版

实例

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<div id="tmpl"></div>
<script id="tmpl1" type="text/x-jquery-tmpl">
    <div style="margin-bottom:10px;">
      <span>${ID}</span>
      <span style="margin-left:10px;">{{tmpl($data) ‘#tmpl2‘}}</span>
    </div>    
</script>
<script id="tmpl2" type="type/x-jquery-tmpl">
    {{each Name}}${$value}  {{/each}}  
</script>
<script type="text/javascript">
  var users = [{ ID: ‘think8848‘, Name: [‘Joseph‘, ‘Chan‘] }, { ID: ‘aCloud‘, Name: [‘Mary‘, ‘Cheung‘]}];
   $("#tmpl1").tmpl(users).appendTo(‘#tmpl‘);
</script>

  

{{wrap}},包装器

实例

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<div id="wrapDemo">
    </div>
<script id="myTmpl" type="text/x-jquery-tmpl">
    The following wraps and reorders some HTML content:
    {{wrap "#tableWrapper"}}
        <h3>One</h3>
        <div>
            First <b>content</b>
        </div>
        <h3>Two</h3>
        <div>
            And <em>more</em> <b>content</b>...
        </div>
    {{/wrap}}
    </script>
<script id="tableWrapper" type="text/x-jquery-tmpl">
    <table cellspacing="0" cellpadding="3" border="1"><tbody>
        <tr>
            {{each $item.html("h3", true)}}
                <td>
                    ${$value}
                </td>
            {{/each}}
        </tr>
        <tr>
            {{each $item.html("div")}}
                <td>
                    {{html $value}}
                </td>
            {{/each}}
        </tr>
    </tbody></table>
    </script>
 <script type="text/javascript">
        $(function () {
            $(‘#myTmpl‘).tmpl().appendTo(‘#wrapDemo‘);
        });
    </script>

  

$data $item $item代表当前的模板;$data代表当前的数据。

 

 实例:

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<div id="div_item_data"></div>
<script id="item_data" type="text/x-jquery-tmpl">
     <div style="margin-bottom:10px;">
    <span>${$data.ID}</span>
    <span style="margin-left:10px;">${$item.getName(" ")}</span>
   </div>
</script>
<script type="text/javascript">
   var users = [{ ID: ‘think8848‘, Name: [‘Joseph‘, ‘Chan‘] }, { ID: ‘aCloud‘, Name: [‘Mary‘, ‘Cheung‘]}];
     $("#item_data").tmpl(users,
                {
                getName: function (spr) {
                   return this.data.Name.join(spr);
                }
                }).appendTo(‘#div_item_data‘);
</script>

 

$.tmplItem()方法,使用这个方法,可以获取从render出来的元素上重新获取$item

实例

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<script type="text/javascript">
  $(‘#demo‘).delegate(‘div‘, ‘click‘, function () {
                var item = $.tmplItem(this);
                alert(item.data.Name);
            });
</script>

  

jquery tmpl 详解(转),码迷,mamicode.com

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