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A-Tione / OneTo

// ==UserScript==
// @name OneTo
// @description temporal occlusion
// @namespace  https://xiedaimala.com/
// @version 1.1
// @author A-Tione
// @license MIT
// @include *
// @run-at document-endo
// @match http://*/*
// @grant none
// ==/UserScript==

(function() {
    var dragBox = function (drag, wrap) {

      function getCss(ele, prop) {
        return parseInt(window.getComputedStyle(ele)[prop]);
      }

      var initX,
        initY,
        dragable = false,
        wrapLeft = getCss(wrap, "left"),
        wrapRight = getCss(wrap, "top");

      drag.addEventListener("mousedown", function (e) {
        dragable = true;
        initX = e.clientX;
        initY = e.clientY;
      }, false);

      document.addEventListener("mousemove", function (e) {
        if (dragable === true ) {
          var nowX = e.clientX,
            nowY = e.clientY,
            disX = nowX - initX,
            disY = nowY - initY;
          wrap.style.left = wrapLeft + disX + "px";
          wrap.style.top = wrapRight + disY + "px";
        }
      });

      drag.addEventListener("mouseup", function (e) {
        dragable = false;
        wrapLeft = getCss(wrap, "left");
        wrapRight = getCss(wrap, "top");
      }, false);

    };
    let currentDiv = document.getElementById("div1");
    let newDiv = document.createElement('div')
    newDiv.style.position = 'fixed'
    newDiv.style.width = '200px'
    newDiv.style.height = '200px'
    newDiv.style.background = 'black'
    document.body.insertBefore(newDiv, currentDiv);

    dragBox(newDiv, newDiv);
  })()