js-timers (npm): 包含定时器：浏览器中使用的定时器，通过补偿比setInterval更精准；倒计时定时器；(timer: Timer used in browser,More accurate than setInterval; count-down-timer;)
Keywords: timer|time|countdown|count-down|setInterval|setTimeout|js-timer|js-timers|clock|定时器|倒计时