本文主要講述HTML常用例項，如需HTML和CSS基礎請到菜鳥教程自己補習。

1. 簡書類

實現效果

html程式碼

<div class="container">
    <form action="" class="parent">
        <input type="text" class="search" placeholder="搜尋">
        <input type="button" name="" id="" class="btn">
    </form>
</div>

css程式碼

    * {
    margin: 0;
    padding: 0;
}
.container {
    height: 70px;
    width: 800px;
    margin: 100px auto 0 auto;
}
.parent {
    position: relative;
}
.search {
    width: 300px;
    height: 40px;
    border-radius: 18px;
    outline: none;
    border: 1px solid #ccc;
    padding-left: 20px;
    position: absolute;
}
.btn {
    height: 35px;
    width: 35px;
    position: absolute;
    background: url("images/topbar.png") no-repeat -2px -99px;
    top: 6px;
    left: 285px;
    border: none;
    outline: none;
    cursor: pointer;
}
 

2. 百度類

實現效果

html程式碼

<div class="container">
    <form action="" class="parent">
        <input type="text">
        <input type="button" value="百度一下">
    </form>
</div>

css程式碼

重點：
1.當input框foucus時，border顏色改變，而不是保留outline
2.button按鈕預設box-sizing: border-box

			.container {
				width: 500px;
				height: 50px;
				margin: 100px auto;
			}
			
			.parent {
				width: 100%;
				height: 42px;
				top: 4px;
				position: relative;
			}
			
			.parent>input:first-of-type {
				/*輸入框高度設定為40px, border佔據2px，總高度為42px*/
				width: 380px;
				height: 40px; 
				border: 1px solid #ccc;
				font-size: 16px;
				outline: none;
			}
			
			.parent>input:first-of-type:focus {
				border: 1px solid #317ef3;
				padding-left: 10px;
			}
			
			.parent>input:last-of-type {
				/*button按鈕border並不佔據外圍大小，設定高度42px*/
				width: 100px;
				height: 44px; 
				position: absolute;
				background: #317ef3;
				border: 1px solid #317ef3;
				color: #fff;
				font-size: 16px;
				outline: none;
			}

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