scroll event 최적화 함수

const toFitScroll = (cb) => {
     let tick = false

     return function trigger () {
          if (tick) {
               return
          }
          tick = true
          return requestAnimationFrame(function task() {
               tick = false
               return cb()
          })
     }
}

const onScroll = () => {


}

window.addEventListener('scroll', toFitScroll(onScroll), { passive : true })

https://jbee.io/web/optimize-scroll-event/

스크롤 이벤트 최적화