lovecoding
/
class


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #box {
            width: 200px;
            height: 200px;
            background: #00f;
            position: absolute;
            /* left: 1px; */
        }
    </style>
</head>
<body>
    <div id="box"></div>
    <script>
        var box = document.getElementById("box");
        box.onmousedown = function(e) {
            var x = e.clientX - box.offsetLeft;
            var y = e.clientY - box.offsetTop;
            console.log(x,y)
            box.onmousemove = function(e) {
                var x1 = e.clientX;
                var y1 = e.clientY;
                console.log(x1)
                box.style.left = x1 - x + 'px';
                box.style.top = y1 - y + 'px';
            }
        }
        box.onmouseup = function() {
            box.onmousemove = null;
        }
    </script>
</body>
</html>