jquery - 受 Instagram 网络/桌面启发的搜索框

Question

如果您在桌面/PC 上访问某人的 instagram 页面，单击搜索栏时，它会向左浮动，然后可以输入文本进行搜索。当搜索字段中没有文本时，搜索图标和“搜索”占位符会回到原来的中心位置。

我假设 javacript/jquery 用于此，我也想实现它，但我不知道有任何脚本可以完成此操作。下面是我的 HTML 和 CSS 代码，任何帮助将不胜感激!

HTML

<div class="box">
    <div class="container-1">
    <span class="icon"><i class="fa fa-search"></i></span>
    <input type="search" id="search" placeholder="Search" />
    </div>
    </div>

CSS

.box{
  margin: 3px auto;

  width: 200px;
  height: 20px;
  padding-right: 10px;
}

.container-1{
  width: 200px;
  vertical-align: middle;
  white-space: nowrap;
  position: relative;

}

.container-1 input#search{
  width: 200px;
  height: 30px;
  background: #FFFFFF;
  border: 1px solid #C5C4C4;
  font-size: 10pt;
  text-align: center;
  color: #000000;

  -webkit-border-radius: 25px;
  -moz-border-radius: 25px;
   border-radius: 25px;


  -webkit-transition: background .55s ease;
  -moz-transition: background .55s ease;
  -ms-transition: background .55s ease;
  -o-transition: background .55s ease;
   transition: background .55s ease;
}


.container-1 input#search::-webkit-input-placeholder {
   color: #A8A7A7;
   letter-spacing: 1px;
   font-size: 12px;
}

.container-1 input#search:-moz-placeholder { /* Firefox 18- */
   color: #A8A7A7; 
   letter-spacing: 1px;
   font-size: 12px; 
}

.container-1 input#search::-moz-placeholder {  /* Firefox 19+ */
   color: #A8A7A7;
   letter-spacing: 1px;
   font-size: 12px;  
}


.container-1 input#search:-ms-input-placeholder {  
   color: #A8A7A7; 
   letter-spacing: 1px;
   font-size: 12px; 
}

input:focus::-webkit-input-placeholder { color:transparent; }
input:focus:-moz-placeholder { color:transparent; } /* Firefox 18- */
input:focus::-moz-placeholder { color:transparent; } /* Firefox 19+ */
input:focus:-ms-input-placeholder { color:transparent; } /* oldIE ;) */


.container-1 .icon{
  position: absolute;
  padding-top: 8px;
  padding-left: 50px;
  font-size: 12px;
  z-index: 1;
  color: #A8A7A7;

}



.container-1 input#search:hover, .container-1 input#search:focus, .container-1 input#search:active{
    outline:none;
    background: #ffffff;

  }



  input::-webkit-search-decoration,
input::-webkit-search-cancel-button {
  display: none; 
}


  @media all and (max-width : 370px) {


.box{
  margin: 15px auto;

  width: 200px;
  height: 20px;
  padding-right: 10px;
}
  }

Answer 1

我创建了一个简单的 fiddle ，让您了解如何完成它。现在我不知道如何使占位符居中，所以它是固定填充的。

input {
  width: 200px;
  padding-left: 80px;
  box-sizing: border-box;
  
  background: url(https://cdn3.iconfinder.com/data/icons/google-material-design-icons/48/ic_search_48px-128.png);
  background-size: 16px;
  background-repeat: no-repeat;
  background-position: 62px 0;
}
input:focus {
  padding-left: 16px;
  background-position: 0;
}

<input type="text" placeholder="Search" />

附言您可以通过提供过渡来轻松地为这种效果设置动画，例如:

transition: all 0.05s ease-in-out;

它应该是这样的:

input {
  width: 200px;
  padding-left: 80px;
  box-sizing: border-box;
  
  background: url(https://cdn3.iconfinder.com/data/icons/google-material-design-icons/48/ic_search_48px-128.png);
  background-size: 16px;
  background-repeat: no-repeat;
  background-position: 62px 0;
  
  transition: all 0.05s ease-in-out;
}
input:focus {
  padding-left: 16px;
  background-position: 0;
}

<input type="text" placeholder="Search" />

---

(来自 www.iconfinder.com 的搜索图标)