setInterval（）
Usage: setInterval("method name", time);
Function: execute the method every once in a while.
Code example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="button" value="查询" onclick="jump()" />
<input type="button" value="停止" onclick="c()" />
<input type="button" value="开始" onclick="s()" />
<!--window-->
<script>
function t(){
console.log(857);
}
var id = setInterval("t()",1000);
function s(){
id = setInterval("t()",1000);
}
//停止setInterval
function c(){
clearInterval(id);
}
</script>
</body>
</html>
Result display:
Click the end button to stop executing the method, and the number of times is determined to be 4; click the start button, and continue to execute the method once per second from 4 on.
setTimeout（）
Usage: setTimeout("method name", time);
Function: After a period of time, the execution of the method ends, that is, the method is executed only once.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="button" value="查询" onclick="jump()" />
<input type="button" value="停止" onclick="c()" />
<input type="button" value="开始" onclick="s()" />
<!--window-->
<script>
function t(){
console.log(857);
}
//运算倒计时
function s(){
var id = setTimeout("t()",1000);
}
//停止setTimeout
function c(){
clearTimeout(id);
}
</script>
</body>
</html>Result display:
