js运动 多数据运动 含JSON

时间：2022-08-15 15:33:01
<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<style>

#div1 {width:100px; height: 100px; background: red; position: absolute; left: 0px; top: 30px; left: 400px;}

</style>

<script>

window.onload = function() {

    var oDiv1 = document.getElementById('div1');

    oDiv1.onclick = function() {

        //下面的运动会清除掉上面的定时器

        /*startMove(this, 'width', 200, 10);

        startMove(this, 'height', 200, 10);*/

        startMove(this, {

            width : 200,

            height: 200

        }, 10);

    }

    function startMove(obj, json, iSpeed) {

        clearInterval(obj.iTimer);

        var iCur = 0;

        obj.iTimer = setInterval(function() {

            //定时器每走一下，就要把要运动的属性都推进一次

            for ( var attr in json ) {

                var iTarget = json[attr];

                if (attr == 'opacity') {

                    iCur = Math.round(css( obj, 'opacity' ) * 100);

                } else {

                    iCur = parseInt(css(obj, attr));

                }

                if (iCur == iTarget) {

                    clearInterval(obj.iTimer);

                } else {

                    if (attr == 'opacity') {

                        obj.style.opacity = (iCur + iSpeed) / 100;

                        obj.style.filter = 'alpha(opacity='+ (iCur + iSpeed) +')';

                    } else {

                        obj.style[attr] = iCur + iSpeed + 'px';

                    }

                }

            }

        }, 30);

    }

    function css(obj, attr) {

        if (obj.currentStyle) {

            return obj.currentStyle[attr];

        } else {

            return getComputedStyle(obj, false)[attr];

        }

    }

}

</script>

</head>

<body>

    <div id="div1"></div>

</body>

</html>

相关文章