2025-03-27 23:55:04 +08:00
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<!doctype html>
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2022-05-18 22:35:13 +08:00
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<html>
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2025-03-27 23:55:04 +08:00
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>模板引擎 - Layui</title>
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<link rel="stylesheet" href="../src/css/layui.css">
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<style>
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.laytpl-demo{border: 1px solid #eee;}
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.laytpl-demo:first-child{border-right: none;}
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.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;}
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.laytpl-demo>div:first-child{height: 32px; line-height: 32px; padding: 6px 11px; border-bottom: 1px solid #eee; background-color: #F8F9FA;}
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.laytpl-demo .layui-tabs{top: -1px;}
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2022-05-18 22:35:13 +08:00
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2025-03-27 23:55:04 +08:00
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#ID-tpl-view-body {
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height: calc(100vh - 430px); overflow: auto; clear: both;
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}
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#ID-tpl-view-body > div {
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display: none;
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}
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.laytpl-demo pre {
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padding: 16px; background-color: #20222A; color: #F8F9FA; font-family: 'Courier New',Consolas, monospace;
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}
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</style>
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</head>
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<body>
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<div class="layui-padding-3">
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2022-05-18 22:35:13 +08:00
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<div class="layui-row">
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2025-03-27 23:55:04 +08:00
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<div class="layui-col-xs6 laytpl-demo">
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<div>
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<a href="javascript:;" id="ID-tpl-src-title">
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<cite><strong>模板</strong></cite>
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<i class="layui-icon layui-icon-down layui-font-12"></i>
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</a>
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</div>
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<textarea id="ID-tpl-src"></textarea>
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2022-05-18 22:35:13 +08:00
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</div>
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2025-03-27 23:55:04 +08:00
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<div class="layui-col-xs6 laytpl-demo">
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<div class="layui-row">
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<div><strong>数据</strong></div>
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</div>
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<textarea id="ID-tpl-data">
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2022-05-18 22:35:13 +08:00
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{
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"title": "标题",
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2022-05-27 07:28:25 +08:00
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"desc": "<a href=\"\" style=\"color:blue;\">一段描述</a>",
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2022-05-18 22:35:13 +08:00
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"items": [
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{
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"title": "list 1",
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"child": [{
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"title": "list 1-1",
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"child": [{
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"title": "list 1-1-1"
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}]
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}]
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},
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{
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"title": "list 2",
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"child": [{
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"title": "list 2-1"
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}]
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},
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{"title": "list 3"}
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]
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}</textarea>
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</div>
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2025-03-27 23:55:04 +08:00
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<div class="layui-col-xs12 laytpl-demo" style="border-top: none;">
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<div class="layui-row">
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<div class="layui-col-xs4 layui-tabs" id="ID-tpl-view-header">
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<ul class="layui-tabs-header">
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<li><strong>渲染结果</strong></li>
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<li><strong>源码</strong></li>
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</ul>
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</div>
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<div class="layui-col-xs4" style="text-align: center">
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<button class="layui-btn layui-btn-sm layui-btn-border" lay-on="test">性能测试</button>
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</div>
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<div class="layui-col-xs4" style="text-align: right">
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<span class="layui-badge" id="ID-tpl-view-time"></span>
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</div>
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</div>
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<div id="ID-tpl-view-body">
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<div class="layui-show layui-padding-3 layui-text" id="ID-tpl-view"></div>
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<div><pre id="ID-tpl-view-code"></pre></div>
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</div>
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2022-05-18 22:35:13 +08:00
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</div>
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2025-03-27 23:55:04 +08:00
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</div>
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<script type="text/html" id="ID-tpl-template-modern">
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<h2>
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{{= d.title }} - {{= d.title ? '#' : '' }}
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{{ if(true){ }}AAAA{{='A'}}{{ } }}
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</h2>
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{{- include('ID-tpl-template-common', {title: '头部'}) }}
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<hr>
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<p>转义输出：{{= d.desc }}</p>
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<p>原文输出：{{- d.desc }}</p>
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{{# 这是一段注释。仅在模板中显示，不在视图中输出 }}
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{{!
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这是一段不进行模板解析的区域，可显示原始标签：
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{{ let a = 0; }}、{{= escape }}、{{- source }}、{{# comments }}、{{! ignore !}}
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!}}
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{{# 空主体测试 }}
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{{}} {{ }} {{ }} {{= }} {{=}} {{= }}
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<div>
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{{- !0 ? '<br>循环输出：' : '' }}
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<hr>
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<ul>
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{{
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var str = "一级列表 a \\ b c";
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d.items.forEach(function(value, index) {
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}}
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<li class="{{= index > 0 ? 'list' : '' }}">
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<strong>{{= value.title }}</strong>
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{{ if(value.content){ }}
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<span>{{= value.content }}</span>
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{{ } }}
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<span>{{= value.time || '' }}</span>
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{{= str }}
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{{- include('ID-tpl-template-list', { items: value.child }) }}
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</li>
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{{ }); }}
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{{ if(d.items.length === 0){ }}
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无数据
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{{ } }}
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</ul>
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<hr>
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</div>
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<div>
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{{= d.content || '' }}
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\反斜杠 | '单引号' "双引号" ""''"" | "左双右单' | '左单右双"
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</div>
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<p>渲染时间：{{= layui.util.toDateString(new Date()) }}</p>
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</script>
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<script type="text/html" id="ID-tpl-template-common">
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公共模板 - {{= d.title }}
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</script>
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<script type="text/html" id="ID-tpl-template-list">
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{{ if(d.items && d.items.length > 0){ }}
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<ul>
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{{ layui.each(d.items, function(index, item){ }}
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<li>
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<strong>{{= item.title }}</strong>
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{{- include('ID-tpl-template-list', {items: item.child}) }}
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</li>
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{{ }); }}
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</ul>
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{{ } }}
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</script>
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<script type="text/html" id="ID-tpl-template-test">
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{{ for (var i = 0; i < d.items.length; i++) { }}
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第 {{= d.items[i].index }} 个，Name: {{- d.items[i].name }} Number: {{= d.items[i].number }}
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{{ } }}
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</script>
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<!-- 旧版本模板 -->
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<script type="text/html" id="ID-tpl-template-legacy">
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<h2>
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{{= d.title }} - {{= d.title ? '#' : '' }}
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{{# if(true){ }}AAAA{{='A'}}{{# } }}
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</h2>
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<hr>
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<p>转义输出：{{ d.desc }}</p>
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<p>转义输出：{{= d.desc }}</p>
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<p>原文输出：{{- d.desc }}</p>
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{{}} {{ }} {{ }} {{= }} {{=}} {{= }}
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<div>
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<ul>
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{{# var str = "a b c"; }}
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{{# layui.each(d.items, function(index, item) { }}
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<li class="{{= index > 0 ? 'list' : '' }}">
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<strong>{{= item.title }}</strong>
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{{# if(item.content){ }}
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<span>{{= item.content }}</span>
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{{# } }}
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<span>{{= item.time || '' }}</span>
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{{ str }}
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</li>
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{{# }); }}
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{{# if (d.items.length === 0) { }}
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无数据
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{{# } }}
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</ul>
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<hr>
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</div>
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<div>
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{{= d.content || '' }}
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\反斜杠 | '单引号' "双引号" ""''"" | "左双右单' | '左单右双"
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2022-05-18 22:35:13 +08:00
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</div>
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2025-03-27 23:55:04 +08:00
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<p>渲染时间：{{ layui.util.toDateString(new Date()) }}</p>
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</script>
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</div>
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<script src="../src/layui.js"></script>
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<script>
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layui.use(['laytpl', 'util', 'tabs', 'dropdown'], function() {
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var laytpl = layui.laytpl;
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var util = layui.util;
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var tabs = layui.tabs;
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var dropdown = layui.dropdown;
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var $ = layui.$;
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// 默认设置
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laytpl.config({
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tagStyle: 'modern' // 初始采用新版标签风格
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})
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// 获取模板和数据
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var getData = function(type) {
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return {
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template: $('#ID-tpl-src').val(), // 获取模板
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data: function(){ // 获取数据
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try {
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return JSON.parse($('#ID-tpl-data').val());
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} catch(e) {
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$('#ID-tpl-view').html(e);
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}
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}()
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};
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};
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// 视图渲染
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var renderView = function(html, startTime) {
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timer(startTime);
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$('#ID-tpl-view').html(html);
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$('#ID-tpl-view-code').html(util.escape(html));
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};
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// 生成模板
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var createTemplate = function(opts) {
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opts = $.extend({
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tagStyle: 'modern'
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}, opts);
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// 初始化模板
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var elem = $('#ID-tpl-template-'+ opts.tagStyle);
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$('#ID-tpl-src').val(elem.html());
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return opts;
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};
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var tplConfig = createTemplate();
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var data = getData();
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// 耗时计算
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var timer = function(startTime, title) {
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var endTime = new Date();
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$('#ID-tpl-view-time').html((title || '模板解析耗时：')+ (endTime - startTime) + 'ms');
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};
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var startTime = new Date();
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// 创建一个模板实例
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var templateInst = laytpl(data.template, {
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condense: false, // 不处理连续空白符，即保留模板原始结构
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tagStyle: tplConfig.tagStyle
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});
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// 初始渲染
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templateInst.render(data.data, function(html) {
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renderView(html, startTime);
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});
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// 编辑
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$('.laytpl-demo textarea').on('input', function() {
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var data = getData();
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var startTime = new Date();
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// 若模板有变化，则重新编译模板
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if (this.id === 'ID-tpl-src') {
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templateInst.compile(data.template);
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}
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// 若模板没变，数据有变化，则从模板缓存中直接渲染数据（效率大增）
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templateInst.render(data.data, function(html) {
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renderView(html, startTime);
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});
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});
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// 事件
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util.on({
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// 性能测试
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test: function() {
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var dataLen = 1000 // 数据量
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var renderTimes = 1000; // 渲染次数
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// 初始化数据
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var data = {
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title: '性能测试',
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items: function(items) {
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for (var i = 0; i < dataLen; i++) {
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items.push({
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index: i,
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name: '<strong style="color: red;">张三</strong>',
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number: 100+i
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});
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}
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return items;
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}([])
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};
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|
// 模板
|
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|
|
var startTime = new Date();
|
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|
for (var j = 0; j < renderTimes; j++) {
|
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|
var template = document.getElementById('ID-tpl-template-test').innerHTML;
|
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|
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|
|
var html = laytpl(template).render(data);
|
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|
}
|
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|
|
renderView(html, startTime);
|
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|
}
|
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|
});
|
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|
|
// 局部自定义标签符
|
|
|
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|
|
laytpl(`
|
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|
|
|
|
<% var job = ["前端工程师"]; %>
|
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|
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|
|
<%= d.name %>是一名<%= job[d.index] %>。
|
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|
|
`, {
|
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|
|
open: '<%',
|
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|
|
close: '%>'
|
|
|
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|
|
}).render({
|
|
|
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|
|
name: '张三',
|
|
|
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|
|
index: 0
|
|
|
|
|
|
}, function(str) {
|
|
|
|
|
|
console.log(str); // 张三是一名前端工程师。
|
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
|
|
// 视图结果 tabs
|
|
|
|
|
|
tabs.render({
|
|
|
|
|
|
elem: '#ID-tpl-view-header',
|
|
|
|
|
|
body: ['#ID-tpl-view-body', '>div']
|
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
|
|
// 切换模板
|
|
|
|
|
|
dropdown.render({
|
|
|
|
|
|
elem: '#ID-tpl-src-title',
|
|
|
|
|
|
data: [{
|
|
|
|
|
|
title: '新版本模板',
|
|
|
|
|
|
tagStyle: 'modern'
|
|
|
|
|
|
}, {
|
|
|
|
|
|
title: '旧版本模板',
|
|
|
|
|
|
tagStyle: 'legacy'
|
|
|
|
|
|
}],
|
|
|
|
|
|
click: function(obj){
|
|
|
|
|
|
createTemplate({
|
|
|
|
|
|
tagStyle: obj.tagStyle
|
|
|
|
|
|
});
|
|
|
|
|
|
this.elem.children('cite').html(obj.title);
|
|
|
|
|
|
|
|
|
|
|
|
// 同步设置标签风格
|
|
|
|
|
|
templateInst.config.tagStyle = obj.tagStyle;
|
|
|
|
|
|
|
|
|
|
|
|
var data = getData();
|
|
|
|
|
|
var startTime = new Date();
|
|
|
|
|
|
|
|
|
|
|
|
// 重新渲染
|
|
|
|
|
|
templateInst.compile(data.template).render(data.data, function(html) {
|
|
|
|
|
|
renderView(html, startTime);
|
2022-05-18 22:35:13 +08:00
|
|
|
|
});
|
|
|
|
|
|
}
|
2025-03-27 23:55:04 +08:00
|
|
|
|
})
|
|
|
|
|
|
});
|
|
|
|
|
|
</script>
|
|
|
|
|
|
</body>
|
2022-05-18 22:35:13 +08:00
|
|
|
|
</html>
|
