前端学习笔记day14 移动盒子 封装函数

气死了 一个破题 写了一个半小时

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        body {
            margin: 0px;
        }
        #box1 {
            width: 100px;
            height: 100px;
            background-color: red;
            position: absolute;
            left: 0px;
            top: 50px;
            /*margin-left: 8px;*/

        }
        #box2 {
            width: 100px;
            height: 100px;
            background-color: blue;
            position: absolute;
            left: 0px;
            top: 180px;
        }
    </style>
</head>
<body>
    <input type="button" name="" value='button1' id='btn1'>
    <input type="button" name="" value='buttom2' id='btn2'>
    <div id='box1'></div>
    <div id='box2'></div>
    
    <script>
        var box = document.getElementById('box1');
        var btn1 = document.getElementById('btn1');
        var btn2 = document.getElementById('btn2');
        btn1.onclick = function() {
            animation(box1,200);
            animation(box2,200);
        }
        btn2.onclick = function() {
            animation(box1,800);
            animation(box2,800);
        }
        function animation(element,target) {
            var step = 10;
            if (element.timeId) {
                clearInterval(element.timeId);
                element.timeId = null;
            }
            if (element.offsetLeft >= target) {
                step = -(Math.abs(step));
                console.log(step);
            }
            element.timeId = setInterval(function() {
                if (Math.abs(element.offsetLeft - target) <= Math.abs(step)) {
                    element.style.left = target + 'px';
                    }else {
                        element.style.left = element.offsetLeft + step + 'px';
                    }
                
            },30);
            
        }
    </script>
</body>
</html>

运行结果：

 

posted @ 2019-01-02 20:34  写的BUG代码少  阅读(233)  评论(0)  编辑  收藏  举报