JS-定时器的4种写法及介绍，前端组件开发

// 输出一次 timeout，每隔1S输出一次 interval

/--------------------------------/

// 通过setTimeout模拟setInterval 和 setInterval有啥区别么？
var callback = function () {
if (times++ > max) {
clearTimeout(timeoutId);
clearInterval(intervalId);
}

console.log(‘start’, Date.now() - start);
for (var i = 0; i console.log(‘end’, Date.now() - start);
},
delay = 100,
times = 0,
max = 5,
start = Date.now(),
intervalId, timeoutId;

function imitateInterval(fn, delay) {
timeoutId = setTimeout(function () {
fn();

if (times