题解 | #计时器#
计时器
https://www.nowcoder.com/practice/72c661d926494bd8a50608506915268c
简洁、易读
1. 封装定时器函数
2. setInterval 与 clearInterval
function count(start, end) {
let count = start;
let timer;
let myCallback = () => {
console.log(count++);
if (count > end) clearInterval(timer);
}
myCallback();
timer = setInterval(myCallback, 100);
return {
cancel: () => clearInterval(timer)
}
}