#### 标签与属性的定义
- 标签与属性必须使用小写;
- 属性名称使用中划线进行分割;
> <span class="do">正确实践:</span>
```html
<div class="demo" custom-data="someData" custom-value="someValue" ></div>
```
> <span class="dont">错误实践:</span>
```html
<DIV class="demo" customData="someData" customValue="someValue"></DIV>
```
- 属性值必须使用双引号,多个属性之间使用1个空格进行分割, 属性数量多时使用换行进行格式化;
> <span class="do">正确实践:</span>
```html
<div class="demo"
custom-data="someData"
text-context-menu="{{ menu }}"
right-click-button="button"
custom-value="someValue" >
</div>
```
> <span class="dont">错误实践:</span>
```html
<div class="demo" custom-data="someData" text-context-menu="{{ menu }}" right-click-button="button" custom-value="someValue" >
</div>
```
- 不要在自动闭合标签后使用标签进行闭合;
> <span class="do">正确实践:</span>
```html
<input type="text" value="abc" />
<img src="//google.com/abc.png />
```
> <span class="dont">错误实践:</span>
```html
<input type="text" value="abc"></input>
<img src="//google.com/abc.png" ></img>
```
