H5的新功能

 

required

 

placeholder

 

autofocus

 

autocomplete

 

 

 

 

 

<optgroup label="北京">

<option>东城区</option>

<option>西城区</option>

<option>海淀区</option>

</optgroup>

<optgroup label="成都">

<option>青羊区</option>

<option>金牛区</option>

<option>金牛区</option>

</optgroup>

 

<input type="text" list="cars">

<datalist id="cars">

<option>宝马<option>

<option>大众<option>

<option>奥迪<option>

</datalist>

 

 

 

 

mark