<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>视图模板引擎 - layui</title>
<link rel="stylesheet" href="../src/css/layui.css">
<style>
.laytpl-demo{border: 1px solid #EBEBEB;}
.laytpl-demo>textarea{position: relative; display: block; width:100%; height: 300px; padding: 11px; border: 0; box-sizing: border-box; resize: none; background-color: #fff; font-family: Courier New; font-size: 13px;}
.laytpl-demo>div:first-child{height: 32px; line-height: 32px; padding: 6px 11px; border-bottom: 1px solid #EBEBEB; background-color: #F8F9FA;}
</style>
</head>
<body>
<div>
<div class="layui-row">
<div class="layui-col-xs6 laytpl-demo">
<div>模板</div>
<textarea id="demoTPL1"><h1>{{ d.title }}</h1>
<p>转义输出(HTML)：{{ d.desc }}</p>
<p>转义输出(HTML)：{{= d.desc }}</p>
<p>原始输出(HTML)：{{- d.desc }}</p>
{{#}}
<div class="layui-section">
<hr>
<ul>
{{# var str = "a b c";
layui.each(d.items, function(index, item){ }}
<li class="{{ index > 0 ? 'list' : '' }}">
<strong>{{ item.title }}</strong>
{{# if(item.content){ }}
<span>{{ item.content }}</span>
{{# } }}
<span>{{ item.time || '' }}</span>
{{ str }}
</li>
{{# }); if(d.items.length === 0){ }}
无数据
{{# } }}
</ul>
<hr>
</div>
<div>
{{ d.content || '' }}
{{ }} {{}}
{{ }}
\a
'12'"""""
"哈''哈"
</div>
<p>渲染时间：{{ layui.util.toDateString(new Date()) }}</p></textarea>
</div>
<div class="layui-col-xs6 laytpl-demo">
<div class="layui-row">
<div class="layui-col-xs3">数据</div>
<div class="layui-col-xs9" style="text-align: right">
<button class="layui-btn layui-btn-sm layui-btn-primary" lay-on="createData">生成数据</button>
</div>
</div>
<textarea id="demoData1">
{
"title": "标题",
"desc": "<a href=\"\" style=\"color:blue;\">一段描述</a>",
"items": [
{
"title": "list 1",
"child": [{
"title": "list 1-1",
"child": [{
"title": "list 1-1-1"
}]
}]
},
{
"title": "list 2",
"child": [{
"title": "list 2-1"
}]
},
{"title": "list 3"}
]
}</textarea>
</div>
<div class="layui-col-xs12 laytpl-demo">
<div class="layui-row">
<div class="layui-col-xs4">视图</div>
<div class="layui-col-xs4" style="text-align: center">
<button class="layui-btn layui-btn-sm layui-btn-primary" lay-on="test1">性能测试</button>
</div>
<div class="layui-col-xs4" style="text-align: right">
<span id="demoViewTime"></span>
</div>
</div>
<div class="layui-padding-sm" id="demoView1"></div>
</div>
</div>
<script type="type/html" template id="demoTplCommon">
公共模板 - {{ d.title }}
</script>
<script type="type/html" template id="demoTplList">
{{# if(d.items && d.items.length > 0){ }}
<ul>
{{# layui.each(d.items, function(index, item){ }}
<li><strong>{{ item.title }}</strong>{{ laytpl.include('demoTplList', {items: item.child}) }}</li>
{{# }); }}
</ul>
{{# } }}
</script>
<script type="type/html" template id="laytplTestTpl">
{{# for(var i = 0; i < d.items.length; i++){ }}
第{{= d.items[i].index }}个，Name: {{- d.items[i].name }} Number: {{= d.items[i].number }}
{{# } }}
</script>
</div>
<script src="../src/layui.js"></script>
<script>
layui.use(['laytpl', 'util'], function(){
var laytpl = layui.laytpl
,util = layui.util
,$ = layui.$;
//获取模板和数据
var get = function(type){
return {
template: $('#demoTPL1').val() //获取模板
,data: function(){ //获取数据
try {
return JSON.parse($('#demoData1').val());
} catch(e){
$('#demoView1').html(e);
}
}()
};
};
var data = get();
//耗时计算
var startTime = new Date().getTime(), timer = function(startTime, title){
var endTime = new Date().getTime();
$('#demoViewTime').html((title || '模板解析耗时：')+ (endTime - startTime) + 'ms');
};
//渲染模板
var thisTpl = laytpl(data.template);
//执行渲染
thisTpl.render(data.data, function(view){
timer(startTime);
$('#demoView1').html(view);
});
//编辑
$('.laytpl-demo textarea').on('input', function(){
var data = get();
if(!data.data) return;
//计算模板渲染耗时
var startTime = new Date().getTime();
//若模板有变化，则重新解析模板；若模板没变，数据有变化，则从模板缓存中直接渲染（效率大增）
if(this.id === 'demoTPL1'){
thisTpl.parse(data.template, data.data); //解析模板
}
//执行渲染
thisTpl.render(data.data, function(view){
timer(startTime);
$('#demoView1').html(view);
});
});
//事件
util.event('lay-on', {
//性能测试
test1: function(){
var dataLen = 1000 //数据量
,renderTimes = 1000; //渲染次数
//初始化数据
var data = {
title: '性能测试'
,items: function(items){
for(var i = 0; i < dataLen; i++){
items.push({
index: i
,name: '<strong style="color: red;">张三</strong>'
,number: 100+i
});
}
return items;
}([])
};
//模板
var startTime = new Date();
for(var j = 0; j < renderTimes; j++){
var template = document.getElementById('laytplTestTpl').innerHTML;
var html = laytpl(template).render(data);
}
timer(startTime, '本次测试耗时：');
$('#demoView1').html(html);
}
});
});
</script>
</body>
</html>