JSFiddle - React, Tailwind, and code Playground

by Manoj Pal

HTML

<div style="height:400px; width:400px; border:solid 1px black;position: absolute;top: 0;
left: 0;" id='parent'>
    <div id='elem' onmousedown='tzdragg.startMoving(event);' onmouseup='tzdragg.stopMoving();'
        >
    </div>
    </div>

CSS

#elem
        {
            position: absolute;
            width: 100px;
            height: 100px;
            background-color: black;
            -webkit-user-select: none;
            -moz-user-select: none;
            -o-user-select: none;
            -ms-user-select: none;
            -khtml-user-select: none;
            user-select: none;
            cursor: default;
        }

JavaScript

function $(el){
                return document.getElementById(el);
            }
            var tzdragg = function(){
                return {
                    move : function(divid,xpos,ypos){
                       console.log('1');
                        var a = $(divid);
                        $(divid).style.left = xpos + 'px';
                        $(divid).style.top = ypos + 'px';
                    },
                    startMoving : function(evt){
                       
                        evt = evt || window.event;
                        var posX = evt.clientX,
                            posY = evt.clientY,
                            a = $('elem'),
                        divTop = a.style.top,
                        divLeft = a.style.left;
                        
                        divTop = divTop.replace('px','');
                        divLeft = divLeft.replace('px','');
                        var diffX = posX - divLeft,
                            diffY = posY - divTop;
                        document.onmousemove = function(evt){
                            evt = evt || window.event;
                            var posX = evt.clientX,
                                posY = evt.clientY,
                                aX = posX - diffX,
                                aY = posY - diffY;
                       var boun=document.getElementById("parent").offsetWidth-document.getElementById("elem").offsetWidth;
                           
                            if((aX>0)&&(aX<boun)&&(aY>0)&&(aY<boun))
                            tzdragg.move('elem',aX,aY);
                        }
                    },
                    stopMoving : function(){
                        var a = document.createElement('script');
                        document.onmousemove = function(){}
                    },
                }
            }();