scrollTo

const scrollTo = (goTo, offset = 0, goToNumber = 0, time = 600) => {
    var target = document.querySelectorAll(goTo)[goToNumber]
    var targetPosition = target.offsetTop - offset
    var startPosition = window.scrollY
    var distance = targetPosition - startPosition
    var duration = time
    var startTime = null
  
    function animationScroll(currentTime) {
      if (startTime === null) startTime = currentTime
      var timeElapsed = currentTime - startTime
  
      var run = ease(timeElapsed, startPosition, distance, duration)
      window.scrollTo(0, run)
      if (timeElapsed < duration) requestAnimationFrame(animationScroll)
    }
  
    function ease(t, b, c, d) {
      t /= d / 2
      if (t < 1) return (c / 2) * t * t + b
      t--
      return (-c / 2) * (t * (t - 2) - 1) + b
    }
  
    requestAnimationFrame(animationScroll)
  }
  
  export default scrollTo