js实现可拖动的布局

思路：采用flex布局，js即时修改固定列的宽度

注意：父元素需设置position:relative；因offsetLeft和offsetTop是相对于具有定位的（position:absolute或者position：relative）父级元素的距离

html：

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>Document</title>

    <link rel="stylesheet" href="./index.css">

    <link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css">

    <script src="./index.js"></script>

</head>

<body>

    <div id="box">

        <div id="left">

        </div>

        <div id="line">

            <a id="line1">

                <span><i class="fa fa-caret-right"></i></span>

            </a>

        </div>

        <div id="right">

        </div>

    </div>

</body>

</html>

css：

body {

    font: 14px/1.5 Arial;

    color: #666;

}

#box {

    position: relative;

    width: 600px;

    height: 400px;

    border: 2px solid #000;

    margin: 10px auto;

    overflow: hidden;

    display: flex;

}

#left {

    height: 100%;

    flex:;

    overflow: hidden;

}

#right {

    width: 300px;

    overflow: hidden;

}

#line {

    width: 8px;

    background: lightblue;

    cursor: col-resize;

}

#line a{

    cursor: pointer;

    text-align: center;

}

js：

function $(id) {

    return document.getElementById(id)

}

window.onload = function () {

    var oBox = $("box"),

        oLeft = $("left"),

        oRight = $("right"),

        oLine = $("line"),

        oLine1 = $("line1");

    var flag = true;

    var wid = 0;

    oLine.onmousedown = function (e) {

        var disX = (e || event).clientX;

        var owidth = oBox.clientWidth - oLine.offsetLeft;

        document.onmousemove = function (e) {

            var iT = owidth - ((e || event).clientX - disX);

            var e = e || window.event;

            var maxT = oBox.clientWidth - oLine.offsetWidth;

            oLine.style.margin = 0;

            iT < 30 && (iT = 30);

            iT > maxT && (iT = maxT);

            wid = iT;

            oRight.style.width = iT + "px";

            return false

        };

        document.onmouseup = function () {

            document.onmousemove = null;

            document.onmouseup = null;

            oLine.releaseCapture && oLine.releaseCapture()

        };

        oLine.setCapture && oLine.setCapture();

        return false

    };

    oLine1.onclick = function () {

        if (flag) {

            oRight.style.width =  30 + "px";

            flag = false;

        } else {

            if (wid && wid > 30) {

                oRight.style.width = wid + "px";

            } else {

                oRight.style.width = 300 + "px";

            }

            flag = true;

        }

    }

};

效果如下：

巴特西

js实现可拖动的布局

最新文章

热门文章