*{padding: 0; margin: 0;}
div{
width: 100px;
height: 100px;
background-color: cadetblue;
margin: 100px;
padding: 10px;
position: relative;
}
p{
position: absolute;
width: 20px;
height: 20px;
background-color: rgb(237, 100, 225);
}
</style>
</head>
<body>
<div>
<p></p>
</div>
<script>
function testOffset(){
var divEle = document.querySelector('div')
var pEle = document.querySelector('p')
console.log( 'divEle.offsetTop :',divEle.offsetTop, ' divEleoffsetLeft', divEle.offsetLeft );
console.log( 'pEle.offsetTop :',pEle.offsetTop, 'pEle.setEleoffsetLeft', pEle.offsetLeft );
}
testOffset()