javascript中li标签的排序和数组sort的用法

时间：2022-04-26 23:45:26
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

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

    <title></title>

    <script type="text/javascript">

        window.onload = function () {

            var oBtn = document.getElementById("btnChange");

            var oUl1 = document.getElementById("ul1");

            oBtn.onclick = function () {

                var aLi = oUl1.getElementsByTagName("li");

                var arr = [];

                for (var i = 0; i < aLi.length; i++) {

                    arr[i] = aLi[i];

                }

                arr.sort(function (li1, li2) {

                    var n1 = parseInt(li1.innerText);

                    var n2 = parseInt(li2.innerText);

                    return n1 - n2;

                });

                for (var i = 0; i < aLi.length; i++) {

                    oUl1.appendChild(arr[i]);

                }

            }

        }

    </script>

</head>

<body>

    <input type="button" name="" value="移动" id="btnChange" />

    <ul id="ul1">

        <li>5</li>

        <li>2</li>

        <li>9</li>

        <li>4</li>

        <li>7</li>

    </ul>

</body>

</html>

　　

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