html中_filter 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<p>点击按钮获取数组中大于 18 的所有元素。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
var ages = [32, 33, 16, 40];
function checkAdult(age) {
    return age >= 18;
}
function myFunction() {
    document.getElementById("demo").innerHTML = ages.filter(checkAdult);//[32, 33, 40]
alert(ages); //[32, 33, 16, 40]
} </script> </body> </html>

 

posted @ 2020-11-18 23:44  java_静止  阅读(171)  评论(0)  编辑  收藏  举报