13 定时器

 

1 setInterval
2 setTimeout
3 关掉定时器

1 setInterval

定时任务 每隔3s执行一次
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>


<script>
    let t = setInterval(function () {
        console.log(111)
    },3000)
</script>


</body>
</html>

每隔3秒执行一次

 

 

2 setTimeout

延迟任务，只执行一次

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>


<script>
    let t = setTimeout(function () {
        console.log(111)
    },3000)
</script>


</body>
</html>

 

 

3 关掉定时器

clearInterval(this.t)
posted @ 2022-02-11 21:39  甜甜de微笑  阅读(30)  评论(0)  编辑  收藏  举报