art-template的前端渲染用法

2021-03-10

目录
1.基础数据渲染
2.输出HTML
3.流程控制
4.遍历
5.调用自定义函数方法
6.子模板引入

基础数据渲染

引入art-template.js文件

1	<script src="template-debug.js"></script>

编写HTML模板

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3

<script id="test" type="text/html">
    <h1>{{title}}</h1>
</script>

向模板插入数据，并输出到页面

var data = {
    title:"hello world"
};
var html = template("test",data);
document.getElementById('content').innerHTML = html;

输出：

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3

<script id="test" type="text/html">
    <h1>{{title}}</h1>
</script>

注意：{{title}}这是对内容编码输出，应该写成{{@title}}这是对内容不编码输出

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<script id="test" type="text/html">
    <h1>{{#title}}</h1>
</script>

输出：

var data = {
    title:"<p>hello world</p>"
};
var html = template("test",data);
document.getElementById('content').innerHTML = html;

流程控制语句

{{if value}}
…
{{else if value}}
…
{{else}}
…
{{/if}}

art-template里面的流程控制就相对其他模板来说强大很多了，直接看例子吧

<script id="test" type="text/html">
    <div>
        {{if bok==22}}
        <h1>线上</h1>
        {{else if bok==33}}
        <h2>隐藏</h2>
        {{else}}
        <h3>走这里</h3>
        {{/if}}
    </div>
</script>
<script>
    var data = {
        "bok":22
    };
    var html = template('test',data);
    document.getElementById("app").innerHTML = html;
</script>

嵌套的写法：

<script id="test" type="text/html">
    <div>
        {{if bok}}
            {{if list.length>=0}}
                {{each list}}
                    <p>{{$index}}:{{$value}}</p>
                {{/each}}
            {{else}}
                <p>没有数据</p>
            {{/if}}
        {{/if}}
    </div>
</script>
<script>
    var data = {
        "bok":true,
        list:["a","b","c"]
    };
    var html = template('test',data);
    document.getElementById("app").innerHTML = html;
</script>

循环遍历语句

{{each name}}
索引：{{$index}}
值：{{$value}}
{{/each}}

<script id="test" type="text/html">
<div>
    <ul>
        {{if c==100}}
            <ul>
                {{each person}}
                    <li>
                        编号：{{$index+1}}--姓名：{{$value.name}}--年龄：{{$value.age}}
                    </li>
                {{/each}}
            </ul>
        {{/if}}
    </ul>
</div>
</script>

<script>
    var data = {
        c:100,
        person:[
            {name:"jack",age:18},
            {name:"tom",age:19},
            {name:"jerry",age:20},
            {name:"kid",age:21},
            {name:"jade",age:22}
        ]
    };
    var html = template("test",data);
    document.getElementById("content").innerHTML = html;
</script>

调用自定义方法

<script id="test" type="text/html">
    {{if c==100}}
        <ul>
            {{each person}}
                <li>姓名：{{$value.name}}--性别：{{show($value.sex)}}</li>
            {{/each}}
        </ul>
    {{/if}}
</script>
<div id ="app">
	
</div>
<script>
    var data = {
        c:100,
        person:[
            {name:"jack",age:18,sex:1},
            {name:"tom",age:19,sex:0},
            {name:"jerry",age:20,sex:0},
            {name:"kid",age:21,sex:1},
            {name:"jade",age:22,sex:0}
        ]
    };
    //自定义函数
   template.defaults.imports.show = function(sex){
      console.log(sex);//同样可以打印日志到控制台
        if(sex==0){
        return "男"
        }else if(sex==1){
              return "女"
      }
        };

    var html = template("test",data);
    document.getElementById("app").innerHTML = html;
</script>

</body>
</html>

调用子模板

引入子模板：

1	{{include ‘main’}}

数据默认为共享

引入子模板：

1	{{include ‘main’ a}} a

为制定数据，但是同样必须是父级数据，可以看看下面的例子，如果不注入a的话，引入的子模板是接受不到数据的

<body>
<div id="app"></div>
<script src="template-debug.js"></script>
<script id="main" type="text/html">
    <ul>
       {{each list}}
            <li>{{$value}}</li>
        {{/each}}
    </ul>
</script>
<script id="test" type="text/html">
    <div>
        <ul>
            {{each person}}
                <li>{{$value.name}}</li>
            {{/each}}
        </ul>
        {{include 'main' a}}
    </div>
</script>
<script>
    var data = {
        person:[
            {name:"jack",age:18},
            {name:"tom",age:19},
            {name:"jerry",age:20},
            {name:"kid",age:21},
            {name:"jade",age:22}
        ],
        a:{
            list:['文艺', '博客', '摄影', '电影', '民谣', '旅行', '吉他']
        }
    };
    var html = template("test",data);
    document.getElementById("app").innerHTML=html;
</script>
</body>

嵌套渲染

对于列表list中每个元素item1，遍历item1对象中的map对象的每个元素item2

var template = require('art-template')
var str = `
{{each list item1 index1}}
    <p>段落{{index1}}</p>
    {{each item1.map item2 index2}}
        {{index2}}: {{item2.good}}
    {{/each}}
{{/each}}
`
var json = {
    list: [
        {
            map: [
                {
                    good: 'apple'
                },
                {
                    good: 'orange'
                }
            ]
        },
        {
            map: [
                {
                    good: 'banana'
                },
                {
                    good: 'penaple'
                }
            ]
        }
    ]
}
var str2 = template.render(str, json)
console.log(str2)