# restrict、template、replace属性
## restrict
* restrict:指令在模版中的使⽤方式
* 可以4种风格任意组合，如果忽略restrict，默认为A
* 如果打算支持IE8，请使用基于属性和样式类的指令
| 字母 | 风格 | 示例 |
| -- | --- | ------------------------------------ |
| E | 元素 | `` |
| C | 样式类 | `` |
| A | 属性 | `` |
| M | 注释 | `` |
## template
* template:模板内容，这个内容会根据 replace 参数的设置
替换节点或只替换节点内容。
## replace
* replace:如果此配置为true则替换指令所在的元素，如果为false或者不指定，则把当前指令追加到所在的元素内部
* 对于restrict为元素(E)在最终效果中是多余的，所有replace通常设置为true
**例子：**
```markup
```
app/index.js
```javascript
var myApp = angular.module('myApp', [], ['$compileProvider',function ($compileProvider) {
$compileProvider.directive('customTags',function(){
return {
restrict:'ECAM',
template:'custom-tags-html
',
replace:true
}
});
}])
```
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