javascript中li標簽的排序和數組sort的用法
阿新 • • 發佈：2019-01-08
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<!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="移動" 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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javascript中li標簽的排序和數組sort的用法