HTML DOM offsetTop Property

The HTML DOM offsetTop property returns a number corresponding to the top position of the specified element relative to the top side of the parent element.

Following is the syntax −

Returning number value in pixels (px)

HTMLelement.offsetTop

Here, returned value corresponds to −

The top position and margin of the specified element
The top padding, scrollbar, border, and margin of the parent element

Let us see an example of HTML DOM offsetTop property −

Example

<!DOCTYPE html>
<html>
<head>
<title>HTML DOM offsetTop</title>
<style type="text/css">
   #picForm {
      width:70%;
      margin: 0 auto;
      text-align: center;
   }
   input[type="button"] {
      border-radius: 10px;
   }
   #containerDiv {
      margin: 0 auto;
   }
</style>
</head>
<body>
   <form id="picForm">
      <fieldset>
         <legend>HTML-DOM-offsetTop</legend>
         <div id="containerDiv">
            <img id="image" src="https://www.tutorialspoint.com/compiler_design/images/compiler-design-mini-logo.jpg">
         </div>
         <input type="button" onclick="getHeight()" value="Get offsetTop">
         <div id="divDisplay"></div>
      </fieldset>
   </form>
<script>
   var divDisplay = document.getElementById("divDisplay");
   var picForm = document.getElementById("picForm");
   var containerDiv = document.getElementById("containerDiv");
   function getHeight() {
      // window.getComputedStyle() gets the computed css
      var style = window.getComputedStyle(picForm);
      var style2 = window.getComputedStyle(document.body);
      divDisplay.innerHTML = 'Top Offset of form: '+picForm.offsetTop+'px';
      divDisplay.innerHTML += '<br>Top position of Child(form): '+style.Top;
      divDisplay.innerHTML += '<br>Top margin of Child(form): '+style.marginTop;
      divDisplay.innerHTML += '<br>Top padding of Parent(body): '+style2.paddingTop;
      divDisplay.innerHTML += '<br>Top border of Parent(body): '+style2.borderTopWidth;
      divDisplay.innerHTML += '<br>Top margin of Parent(body): '+style2.marginTop;
   }
</script>
</body>
</html>

Output

Before clicking any button −

HTML DOM offsetTop Property

After clicking ‘Get offsetTop’ button −

HTML DOM offsetTop Property