css transform-origin 属性实例 - 自学教程(runoops.com)

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>css transform-origin 属性 实例 - 自学教程(runoops.com)</title>
    <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('div2').style.transform = "rotate(" + value + "deg)";
            document.getElementById('div2').style.msTransform = "rotate(" + value + "deg)";
            document.getElementById('div2').style.webkitTransform = "rotate(" + value + "deg)";
            document.getElementById('div2').style.MozTransform = "rotate(" + value + "deg)";
            document.getElementById('div2').style.OTransform = "rotate(" + value + "deg)";
            document.getElementById('persp').innerHTML = value + "deg";
        }

function changeOrg() {
            var x = document.getElementById('ox').value;
            var y = document.getElementById('oy').value;
            document.getElementById('div2').style.transformOrigin = x + '% ' + y + '%';
            document.getElementById('div2').style.msTransformOrigin = x + '% ' + y + '%';
            document.getElementById('div2').style.webkitTransformOrigin = x + '% ' + y + '%';
            document.getElementById('div2').style.MozTransformOrigin = x + '% ' + y + '%';
            document.getElementById('div2').style.OTransformOrigin = x + '% ' + y + '%';
            document.getElementById('origin').innerHTML = x + "% " + y + "%";
        }
    </script>
</head>

<body>

<p>Rotate the red div element, try changing its X-axis and Y-axis:</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>