How to use transform-origin attribute-CSS Tutorial-php.cn

How to use transform-origin attribute

青灯夜游

Release： 2019-02-12 10:17:37

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The transform-origin attribute is used to change the position of the element being transformed. In 2D transformation elements, the position of the element's x and y axes can be changed; in 3D transformation elements, the position of its Z axis can also be changed.

How to use transform-origin attribute

CSS3 transform-origin attribute

Function: The transform-origin attribute allows you to change the element being transformed s position. 2D transform elements change the element's x and y axes. 3D transform elements can also change their Z-axis.

Syntax:

transform-origin: x-axis y-axis z-axis;

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Value	Description
x-axis	Defines where on the X-axis the view is placed. Possible values: ● left ● center ● right ● length ● %
y-axis	Defines where on the Y-axis the view is placed. Possible values: ● top ● center ● bottom ● length ● %
z-axis	Defines where on the Z axis the view is placed. Possible values: length

Note: This attribute must be used together with the transform attribute.

CSS3 Transform-origin attribute usage example

<!DOCTYPE html>
<html>
<head>
<style>
#div1
{
position: relative;
height: 200px;
width: 200px;
margin: 50px;
padding:10px;
border: 1px solid black;
}
#div2
{
padding:50px;
position: absolute;
border: 1px solid black;
background-color: red;
transform: rotate(45deg);
transform-origin:20% 40%;
-ms-transform: rotate(45deg); /* IE 9 */
-ms-transform-origin:20% 40%; /* IE 9 */
-webkit-transform: rotate(45deg); /* Safari and Chrome */
-webkit-transform-origin:20% 40%; /* Safari and Chrome */
-moz-transform: rotate(45deg); /* Firefox */
-moz-transform-origin:20% 40%; /* Firefox */
-o-transform: rotate(45deg); /* Opera */
-o-transform-origin:20% 40%; /* Opera */
}
</style>
<script>
function changeRot(value)
{
document.getElementById(&#39;div2&#39;).style.transform="rotate(" + value + "deg)";
document.getElementById(&#39;div2&#39;).style.msTransform="rotate(" + value + "deg)";
document.getElementById(&#39;div2&#39;).style.webkitTransform="rotate(" + value + "deg)";
document.getElementById(&#39;div2&#39;).style.MozTransform="rotate(" + value + "deg)";
document.getElementById(&#39;div2&#39;).style.OTransform="rotate(" + value + "deg)";
document.getElementById(&#39;persp&#39;).innerHTML=value + "deg";
}
function changeOrg()
{
var x=document.getElementById(&#39;ox&#39;).value;
var y=document.getElementById(&#39;oy&#39;).value;
document.getElementById(&#39;div2&#39;).style.transformOrigin=x + &#39;% &#39; + y + &#39;%&#39;;
document.getElementById(&#39;div2&#39;).style.msTransformOrigin=x + &#39;% &#39; + y + &#39;%&#39;;
document.getElementById(&#39;div2&#39;).style.webkitTransformOrigin=x + &#39;% &#39; + y + &#39;%&#39;;
document.getElementById(&#39;div2&#39;).style.MozTransformOrigin=x + &#39;% &#39; + y + &#39;%&#39;;
document.getElementById(&#39;div2&#39;).style.OTransformOrigin=x + &#39;% &#39; + y + &#39;%&#39;;
document.getElementById(&#39;origin&#39;).innerHTML=x + "% " + y + "%";            
}
</script>
</head>
<body>
<p>旋转红色的DIV元素，尝试更改其X轴和Y轴：</p>
<div id="div1">
  <div id="div2">HELLO</div>
</div>
Rotate:
<input type="range" min="-360" max="360" value="45" onchange="changeRot(this.value)" />
transform: rotateY:(<span id="persp">45deg</span>);
<br><br>
X-axis:<input type="range" min="-100" max="200" value="20" onchange="changeOrg()" id="ox" /><br>
Y-axis:<input type="range" min="-100" max="200" value="40" onchange="changeOrg()" id="oy" />
transform-origin: <span id="origin">20% 40%</span>;
 
</body>
</html>

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How to use transform-origin attribute

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