Articles address https://www.cnblogs.com/sandraryan/
Function: Click the up and down buttons, move elements
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.box {
width: 100px;
height: 100px;
background-color: lightblue;
position: fixed;
top: 0;
left: 0;
}
</style>
</head>
<body>
<div class="box"></div>
<script>
var= document.querySelector Box ( 'Box.' );
// document binding click time
document.onkeydown = function (EV) {
var E = || EV Event;
// Get the left of the current element, the position of
var L = Box .offsetLeft;
var T = box.offsetTop;
// comparing the key code key pressed, up and down movement is up and down as
// (move out of the page, you can be added to control the movement range of the parent element, or more than determined in the js a value stops moving)
Switch (e.keyCode) {
Case 37 [ :
L - =. 5 ;
BREAK ;
Case 38 is :
T-=5;
break;
case 39:
l += 5;
break;
case 40:
t +=5;
}
// 重新设置top left
box.style.left = l + 'px';
box.style.top = t + 'px';
}
</script>
</body>
</html>