表单里面为什么要加has-feedback？

Question

<form role="form">

<div class="form-group has-warning has-feedback">

<label for="inputWarning1" class="control-label">警告</label>

<input type="text" class="form-control" id="inputWarning1"/>

<span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>

</div>

  </form>

Answer 1

那只是加了一个类  具体看你类里面属性设置了

Answer 2

你看下源码呗：.has-feedback label~.form-control-feedback {     top: 25px } .has-feedback {     position: relative } .has-feedback .form-control {     padding-right: 42.5px }