相关疑难解决方法(0)

!function(){
"use strict";
let x, y, drag;
document.addEventListener("mousedown", function(e) {
  if (e.target.parentNode.lastChild !== e.target && e.target.parentNode.classList.contains("main")) {
    //bring element to the front and dispatch mousedown event again otherwise resize doesn't work
    e.target.parentNode.appendChild(e.target);
    return e.target.dispatchEvent(new MouseEvent(e.type, e));
  }

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

  /* if cursor within 20px from bottom right corner don't move */
  const r = e.target.getBoundingClientRect();
  if (r.right < e.x + 20 && r.bottom < e.y + 20)
    return;

  drag …