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doT.js的使用

 

引言

doT.js可以更好的在html端使用json数据。

{{ }}     for evaluation 模板标记符
{{= }}    for interpolation 输出显示，默认变量名叫it
{{! }}    for interpolation with encoding 编码后输出显示
{{? }}    for conditionals 条件分支，if条件的简写
{{~ }}    for array iteration 遍历数组

使用

引入js

    <script type="text/javascript" src="../script/doT.min.js"></script>
    <!-- jquery 移动端替代品 -->
    <script type="text/javascript" src="../script/zepto.min.js"></script>
    <!--<script type="text/javascript" src="../script/jquery.min.js"></script>-->

功能点

1.for interpolation 赋值

格式：

{{= }}

数据源：

{"name":"Jake","age":31}

区域:

<div id="interpolation"></div>

模板：

<script id="interpolationtmpl" type="text/x-dot-template">
<div>Hi {{=it.name}}!</div>
<div>{{=it.age || ''}}</div>
</script>

调用方式：

var dataInter = {"name":"Jake","age":31};
var interText = doT.template($("#interpolationtmpl").text());
$("#interpolation").html(interText(dataInter));

2.for evaluation for in 循环

格式：

{{ for var key in data { }} 
{{= key }} 
{{ } }}

数据源：

{"name":"Jake","age":31,"interests":["basketball","hockey","photography"],"contact":{"email":"jake@xyz.com","phone":"999999999"}}

区域：

<div id="evaluation"></div>

模板：

<script id="evaluationtmpl" type="text/x-dot-template">
{{ for(var prop in it) { }}
<div>KEY:{{= prop }}---VALUE:{{= it[prop] }}</div>
{{ } }}
</script>

调用方式：

var dataEval = {"name":"Jake","age":31,"interests":["basketball","hockey","photography"],"contact":{"email":"jake@xyz.com","phone":"999999999"}};
var evalText = doT.template($("#evaluationtmpl").text());
$("#evaluation").html(evalText(dataEval));

3.for array iteration 数组

格式：

{{~data.array :value:index }}
...
{{~}}

数据源:

{"array":["banana","apple","orange"]}

区域：

<div id="arrays"></div>

模板：

<script id="arraystmpl" type="text/x-dot-template">
{{~it.array:value:index}}
<div>{{= index+1 }}{{= value }}!</div>
{{~}}
</script>

调用方式：

var dataArr = {"array":["banana","apple","orange"]};
var arrText = doT.template($("#arraystmpl").text());
$("#arrays").html(arrText(dataArr));

4.for conditionals 条件

格式：

{{? }} if
{{?? }} else if
{{??}} else

数据源：

{"name":"Jake","age":31}

区域：

<div id="condition"></div>

模板：

<script id="conditionstmpl" type="text/x-dot-template">
{{? it.name }}
<div>Oh, I love your name, {{=it.name}}!</div>
{{?? !it.age === 0}}
<div>Guess nobody named you yet!</div>
{{??}}
You are {{=it.age}} and still dont have a name?
{{?}}
</script>

调用方式：

var dataCondition = {"age":31};
var conText = doT.template($("#conditionstmpl").text());
$("#condition").html(conText(dataCondition));