题解 | #计时器#
计时器
https://www.nowcoder.com/practice/72c661d926494bd8a50608506915268c
function count(start, end) { console.log(start) var timer = setInterval(() => { if (start < end) { start ++ console.log(start) } else { clearInterval(timer) } }, 100) return { cancel: function() { clearInterval(timer) } } }