焦点更改输入搜索fa fa图标

Question

Hi there can someone please help me how can I change on focus from search icon to x icon this is my code:

<form class="navbar-form navbar-left" role="search" style="padding-top: 42px;padding-left: 75px;">
    <div class="input-group">
        <div class="form-group">
            <input style="  background: #f2f2f2;" type="text" class="form-control search" placeholder="search" name="search" id="navbar-search-input">
        </div>
        <div class="input-group-btn">
            <button type="button" id="btnSearch" style=" " class="btn btn-success btnSearch"><i class="fa fa-search"></i></button>
        </div>
    </div>
</form>

Answer 1

The trick is use + to select the next sibling, please check the example

 .navbar-form input:focus + .input-group-btn > .btn > i:before{ content: "\\f00d"; } 

 <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/> <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/> <form class="navbar-form navbar-left" role="search" style="padding-top: 42px;padding-left: 75px;"> <div class="input-group"> <input style=" background: #f2f2f2;" type="text" class="form-control search" placeholder="search" name="search" id="navbar-search-input"> <div class="input-group-btn"> <button type="button" id="btnSearch" style=" " class="btn btn-success btnSearch"> <i class="fa fa-search"> </i> </button> </div> </div> </form>