The difference between setTimeout and setInterval in JS

The difference between setTimeout and setInterval in JS

The setTimeout method is to execute a function or expression after the specified number of milliseconds, while the setInterval method It loops to execute the function or expression every specified number of milliseconds until the clearInterval method clears it.

Code difference

setTimeout

function hello(){
alert("hello");
}
//使用方法名字执行方法
var t1 = window.setTimeout(hello,1000);
var t2 = window.setTimeout("hello()",3000);//使用字符串执行方法
window.clearTimeout(t1);//清除定时器

setInterval

//实时刷新时间单位为毫秒
setInterval('refreshQuery()',8000); 
/* 刷新查询 */
function refreshQuery(){
   $("#mainTable").datagrid('reload',null);
}

Recommended tutorial : "JS Tutorial"

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