CSS transform-origin用法及代码示例

CSS的transform-origin属性用于指定元素的旋转原点。这是元素旋转所围绕的点。它可以用于2D和3D旋转。

用法:

transform-origin:position | initial | inherit

属性值：

position:这指定了旋转原点的位置。它取3个值，分别对应于到盒子左边的距离，到盒子顶边的距离以及旋转的z轴。

可以以长度单位，百分比或关键字指定值。 z轴值始终使用长度单位指定。

范例1：以长度单位指定位置

<!DOCTYPE html> 
<html> 
  
<head> 
    <style> 
        .outer { 
            margin:50px; 
            border:1px dotted; 
            position:relative; 
            height:100px; 
            width:400px; 
            background-color:lightgreen; 
        } 
          
        .box { 
            position:absolute; 
            border:1px solid; 
            background:url( 
"https://contribute.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-logo.png" 
            ) no-repeat; 
            
            background-size:cover; 
            height:100px; 
            width:400px; 
            transform:rotate(15deg); 
            transform-origin:10px 30px; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>CSS transform-origin Property</h1> 
    <p>The CSS transform-origin Property is used to set 
      the origin of the element's transformation</p> 
    <div class="outer"> 
        <div class="box"></div> 
    </div> 
</body> 
  
</html>

输出：
values

范例2：指定百分比位置

<!DOCTYPE html> 
<html> 
  
<head> 
    <style> 
        .outer { 
            margin:50px; 
            border:1px dotted; 
            position:relative; 
            height:100px; 
            width:400px; 
            background-color:lightgreen; 
        } 
          
        .box { 
            position:absolute; 
            border:1px solid; 
            background:url( 
"https://contribute.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-logo.png" 
            ) no-repeat; 
            
            background-size:cover; 
            height:100px; 
            width:400px; 
            transform:rotate(15deg); 
            transform-origin:50% 75%; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>CSS transform-origin Property</h1> 
    <p>The CSS transform-origin Property is  
      used to set the origin of the element's 
      transformation</p> 
    <div class="outer"> 
        <div class="box"></div> 
    </div> 
</body> 
  
</html>

输出：
percentage

范例3：指定关键字的位置

<!DOCTYPE html> 
<html> 
  
<head> 
    <style> 
        .outer { 
            margin:50px; 
            border:1px dotted; 
            position:relative; 
            height:100px; 
            width:400px; 
            background-color:lightgreen; 
        } 
          
        .box { 
            position:absolute; 
            border:1px solid; 
            background:url( 
"https://contribute.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-logo.png" 
            ) no-repeat; 
            
            background-size:cover; 
            height:100px; 
            width:400px; 
            transform:rotate(15deg); 
            transform-origin:bottom left; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>CSS transform-origin Property</h1> 
    <p>The CSS transform-origin Property is  
      used to set the origin of the element's 
      transformation</p> 
    <div class="outer"> 
        <div class="box"></div> 
    </div> 
</body> 
  
</html>

输出：
keyword-value

initial:这用于将属性设置为其默认值。

例：

<!DOCTYPE html> 
<html> 
  
<head> 
    <style> 
        .outer { 
            margin:50px; 
            border:1px dotted; 
            position:relative; 
            height:100px; 
            width:400px; 
            background-color:lightgreen; 
        } 
          
        .box { 
            position:absolute; 
            border:1px solid; 
            background:url( 
"https://contribute.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-logo.png" 
            ) no-repeat; 
            
            background-size:cover; 
            height:100px; 
            width:400px; 
            transform:rotate(15deg); 
            transform-origin:initial; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>CSS transform-origin Property</h1> 
    <p>The CSS transform-origin Property is 
      used to set the origin of the element's 
      transformation</p> 
    <div class="outer"> 
        <div class="box"></div> 
    </div> 
</body> 
  
</html>

输出：
initial

inherit:这用于从其父项继承属性。

例：

<!DOCTYPE html> 
<html> 
  
<head> 
    <style> 
        /* this acts as the parent */ 
          
        .outer { 
            margin:50px; 
            border:1px dotted; 
            position:relative; 
            height:100px; 
            width:400px; 
            background-color:lightgreen; 
            /* set the property of the parent */ 
            transform-origin:bottom left; 
        } 
          
        .box { 
            position:absolute; 
            border:1px solid; 
            background:url( 
"https://contribute.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-logo.png" 
            ) no-repeat; 
            
            background-size:cover; 
            height:100px; 
            width:400px; 
            transform:rotate(15deg); 
            /* inherits the property of the parent */ 
            transform-origin:inherit; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>CSS transform-origin Property</h1> 
    <p>The CSS transform-origin Property is used to set 
      the origin of the element's transformation</p> 
    <div class="outer"> 
        <div class="box"></div> 
    </div> 
</body> 
  
</html>

输出：
inherit

支持的浏览器：下面列出了transform-origin属性支持的浏览器：

chrome 35.0
Internet Explorer 10.0
Firefox 16.0
Safari 9.0
Opera 23.0

相关用法

注：本文由纯净天空筛选整理自sayantanm19大神的英文原创作品 CSS | transform-origin Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。