2018-03-02 14:12:14 +08:00
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## 模版引擎
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### 引入
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我们在使用ajax请求数据时，返回的如果是一个 JSON 格式的字符串，我们需要将其包装到对应的HTML代码中，再添加到页面上，才能看到效果。那么这个包装得过程有没有简单的方法呢?
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假设在 js 中有如下数据：
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```javascript
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var obj = {
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name:"fox",
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age:18,
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skill:"卖萌"
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};
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```
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希望包装为:
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```html
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<ul>
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<li>姓名:fox</li>
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<li>年龄:18</li>
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<li>爱好:卖萌</li>
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</ul>
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```
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我们可以通过模板插件来实现。
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### 模版插件的原理
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我们定义一段文本作为模板,读取文本,使用特殊的符号<%= 属性名 %>,通过正则表达式找到这些特殊的符号进行替换,是不是就实现了这样的效果呢?
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### 常见的模板引擎
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- BaiduTemplate(百度开发)
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- ArtTemplate(腾讯开发)：[GitHub地址](https://github.com/aui/art-template)、[文档地址](https://aui.github.io/art-template/zh-cn/docs/)。
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- velocity.js(淘宝开发)
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- Handlebars
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## ArtTemplate
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标准语法：
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```html
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{{if user}}
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<h2>{{user.name}}</h2>
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{{/if}}
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```
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渲染模板：
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```javascript
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var data = {
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title: `标签`,
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list: [`文艺`, `博客`, `摄影`]
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};
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var html = template(`test`, data);
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document.getElementById(`content`).innerHTML = html;
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```
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举例：
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Title</title>
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<script src="js/template-native-debug.js"></script>
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<script src="js/jquery-2.2.0.js"></script>
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<script id="tpl" type="text/html">
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<h3><%= className %></h3>
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<ul>
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<% for(var i = 0; i< students.length;i++) { %>
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<li><%= i+1 %>. <%= students[i] %></li>
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<% } %>
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</ul>
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</script>
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<script>
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var data = {
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className:"前端1期",
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students:["张飞","刘备","诸葛亮","甄姬","小乔","汪汪"]
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};
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$(function (){
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var html = template("tpl",data);
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$("#demo").html(html);
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})
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</script>
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</head>
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<body>
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<div id="demo">
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</div>
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</body>
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</html>
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```
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效果：
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2018-05-01 09:16:26 +08:00
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2018-03-02 14:12:14 +08:00
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