<!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>
#ss {
position: absolute;
top: 50px;
left: 50px;
width: 500px;
height: 500px;
background-color: blueviolet;
}
#box{
margin-left: 20px;
width:250px;height:300px;border:1px solid #e5e5e5;background:#f1f1f1;}
</style>
<script>
window.onload = function(){
var p = document.getElementById('box')
function getElementLeft(element){
var actualLeft = element.offsetLeft;
var current = element.offsetParent;
while (current !== null){
actualLeft += current.offsetLeft;
current = current.offsetParent;
}
return actualLeft;
}
console.log(getElementLeft(p))
function getElementTop(element){
var actualTop = element.offsetTop;
var current = element.offsetParent;
while (current !== null){
actualTop += current. offsetTop;
current = current.offsetParent;
}
return actualTop;
}
console.log(getElementTop(p))
}
</script>
</head>
<body>
<div id="ss">
<div id="box">
</div>
</div>
</body>
</html>