setInterval()、clearInterval()、setTimeout()和clearTimeout() 的区别

最新推荐文章于 2022-02-05 21:37:51 发布

转载最新推荐文章于 2022-02-05 21:37:51 发布 · 2k 阅读

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<!Doctype html>
<html>
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>setInterval</title>
</head>
<body>
<p>点击按钮查看效果(2s后弹出): <input type="button" value="setTimeout" /> <input type="button" value="clearTimeout" /></p>
<p>点击按钮查看效果(每2s弹出):<input type="button" value="setInterval" /> <input type="button" value="clearInterval" /></p>
<div id="ul1">
<input type="text" id="clock" size="35"/>
<button onclick="window.clearInterval(c)">stop Interval</button>
</div>
<script type="text/javascript">
var c = self.setInterval("clock()",50);
function clock(){
var t = new Date();
document.getElementById("clock").value=t;
}
var timeout=function(){
alert('等待2s后弹出,仅此一次!在等待时间内clearTimeout可停止执行!')
}
var interval=function(){
alert('每2s循环弹出,直至clearInterval或关闭窗口!')
}
var input=document.getElementsByTagName('input');
console.log(input.length);
var clearTimeoutFun=null;
var clearIntervalFun=null;

input[0].onclick=function(){
clearTimeoutFun=setTimeout(timeout,2000);
}
input[1].onclick=function(){
clearTimeout(clearTimeoutFun);
}
input[2].onclick=function(){
clearIntervalFun=setInterval(interval,2000);
}
input[3].onclick=function(){
clearInterval(clearIntervalFun);
}
</script>
</body>
</html>

转载自 http://caibaojian.com/setinterval-settimeout.html