小编mma*_*mma的帖子

const d = document.getElementsByClassName("draggable");

for (let i = 0; i < d.length; i++) {
  d[i].style.position = "relative";
}

function filter(e) {
  let target = e.target;

  if (!target.classList.contains("draggable")) {
    return;
  }

  target.moving = true;
  
  e.clientX ?
  (target.oldX = e.clientX,
  target.oldY = e.clientY) :
  (target.oldX = e.touches[0].clientX,
  target.oldY = e.touches[0].clientY)

  target.oldLeft = window.getComputedStyle(target).getPropertyValue('left').split('px')[0] * 1;
  target.oldTop = window.getComputedStyle(target).getPropertyValue('top').split('px')[0] * 1;

  document.onmousemove = dr;
  document.addEventListener('touchmove', dr, {passive: false})

  function dr(event) {
    event.preventDefault();

    if (!target.moving) {
      return;
    }

    event.clientX ?
    (target.distX …