菜鸟教程在线编辑器

 
                <!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<style>
body{
  background: #f2f2f2;
  font-family: 'Open Sans', sans-serif;
}

.search {
  width: 100%;
  position: relative;
  display: flex;
}

.searchTerm {
  width: 100%;
  border: 3px solid #00B4CC;
  border-right: none;
  padding: 5px;
  height: 20px;
  border-radius: 5px 0 0 5px;
  outline: none;
  color: #9DBFAF;
}

.searchTerm:focus{
  color: #00B4CC;
}

.searchButton {
  width: 40px;
  height: 36px;
  border: 1px solid #00B4CC;
  background: #00B4CC;
  text-align: center;
  color: #fff;
  border-radius: 0 5px 5px 0;
  cursor: pointer;
  font-size: 20px;
}

/*调整大小查看搜索栏的变化*/
.wrap{
  width: 30%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
</style>
</head>
<body>

<h2>搜索框 - 带按钮</h2>

<div class="wrap">
   <div class="search">
      <input type="text" class="searchTerm" placeholder="你想找什么?">
      <button type="submit" class="searchButton">
        <i class="fa fa-search"></i>
     </button>
   </div>
</div>

</body>
</html>
              