一、定时调度:
效果:定时器从0~9:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>定时调度</title>
<script type="text/javascript">
window.onload = function () {
var count = document.getElementById("count");
var num = 1;
var timer = setInterval(function () {
count.innerHTML = num++;
if(num == 10){
clearInterval(timer);
}
},1000);
}
</script>
</head>
<body>
<h1 id="count">0</h1>
</body>
</html>
二、延时调用:
效果:3s之后控制台才调用输出1:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>延时调用</title>
<script type="text/javascript">
var num = 1;
var timer = setTimeout(function () {
console.log(num++);
},3000);/*3s之后控制台出现1*/
// clearTimeout(timer);/*加上这一句则刚出现清除,即不出现*/
</script>
</head>
<body>
</body>
</html>