Home > Article > Web Front-end > Implementation code of native js segmented animation

Implementation code of native js segmented animation

小云云Original: 2018-03-12 15:33:081381browse

This article mainly shares with you the implementation code of native js segmented animation, hoping to help everyone.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <title>函数的封装(多属性),动画的停止-分段动画</title>
    <style type="text/css">
    * {        margin: 0;        padding: 0;    }

    .box {        width: 100px;        height: 100px;        background-color: #F10250;        margin: 50px;        position: relative;    }
    </style>
    <script type="text/javascript">
    function getStyle(element, styleName) {
        if (element.currentStyle) {            return element.currentStyle[styleName];
        } else {            return window.getComputedStyle(element, null)[styleName];
        }
    }    function animate(element, json, fun) {
        //element.timer的意思是给当前元素添加一个timer属性
        //在这里是添加一个计时器
        clearInterval(element.timer);        var isStop = false;
        element.timer = setInterval(function() {
            for (var key in json) {
                isStop = true;                //通过in循环,获取到的是json中的css属性名key
                //通过json[key],可以获取key属性的值
                var target = json[key];                var current = parseInt(getStyle(element, key));                var setp = (target - current) / 10;                //当current的值是一个大于target的值的时候
                //此时setp是一个小于零的数,此时向上取整为零
                //所以需要判断setp是否大于零,大于零向上取整,小于零向下取整
                setp = setp > 0 ? Math.ceil(setp) : Math.floor(setp);
                current += setp;
                console.log(current);                //只要有一个属性动画没有结束,就不停止动画
                //不能用只要有一个属性动画完成就停止动画的思路,
                //因为此时不是所有属性的动画都已经完成
                //不停止动画
                if (Math.abs(target - current) > Math.abs(setp)) {
                    isStop = false;
                } else {                    //强制将current = target
                    current = target;
                }
                element.style[key] = current + "px";                //停止动画
                if (isStop) {
                    clearInterval(element.timer);                    //添加回调函数
                    //判断传入的是一个函数
                    if (typeof fun == "function") {
                        fun();
                    }
                }
            }
        }, 10);
    }
    window.onload = function() {
        var box = document.getElementsByClassName("box")[0];
        box.onclick = function() {
            animate(box, {
                left: 400,
            }, function() {
                animate(box, {
                    width: 500
                }, function() {
                    animate(box, {
                        height: 500
                    }, null);
                });
            });
        }

    }    </script></head><body>
    <p class="box"></p>
    <p class="hezi" style="background-color: green"></p></body></html

The above is the detailed content of Implementation code of native js segmented animation. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：How to make a decision tree in javascriptNext article：How to make a decision tree in javascript

See more

Implementation code of native js segmented animation

Related articles