JSFiddle - React, Tailwind, and code Playground

by mesak

HTML

<div id="draggable1" class="draggable">可以移動喔！</a></div>
<div id="draggable2" class="draggable">可以移動喔！</a></div>
<div id="draggable3" class="draggable">可以移動喔！</a></div>
<div id="draggable4" class="draggable">可以移動喔！</a></div>
<div id="draggable5" class="draggable">可以移動喔！</a></div>

CSS

.draggable{
      background-color:green;
      font-size:9pt;
      padding:30px;
      color:white;
      width:360px;
      height:224px;
      position:absolute;
      }

JavaScript

var rDrag = {
    o: null,
    init: function (o) {
        alert( typeof(o) )
        o.onmousedown = this.start;
    },
    start: function (e) {
        var o;
        e = rDrag.fixEvent(e);
        e.preventDefault && e.preventDefault();
        rDrag.o = o = this;
        o.x = e.clientX - rDrag.o.offsetLeft;
        o.y = e.clientY - rDrag.o.offsetTop;
        document.onmousemove = rDrag.move;
        document.onmouseup = rDrag.end;
    },
    move: function (e) {
        e = rDrag.fixEvent(e);
        var oLeft, oTop;
        oLeft = e.clientX - rDrag.o.x;
        oTop = e.clientY - rDrag.o.y;
        rDrag.o.style.left = oLeft + 'px';
        rDrag.o.style.top = oTop + 'px';
    },
    end: function (e) {
        e = rDrag.fixEvent(e);
        rDrag.o = document.onmousemove = document.onmouseup = null;
    },
    fixEvent: function (e) {
        if (!e) {
            e = window.event;
            e.target = e.srcElement;
            e.layerX = e.offsetX;
            e.layerY = e.offsetY;
        }
        return e;
    }
}
window.onload = function () {
    var obj = document.getElementById('draggable1');
    rDrag.init(obj);
}