代碼實作：
<!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>
</head>
<body>
<ul >
<li>000000000</li>
<li>111111111</li>
<li>222222222</li>
<li>333333333</li>
</ul>
<script>
// 閉包應用-3秒鐘之后,列印所有li元素的內容
var lis = document.querySelector('.nav').querySelectorAll('li');
for (var i = 0; i < lis.length; i++) {
(function(i) {
setTimeout(function() {
console.log(lis[i].innerHTML);
}, 3000)
})(i);
}
</script>
</body>
</html>
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標籤：JavaScript