jQuery event.data Property

Introduction

Return the data passed with the on() method for each <p> element:

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<!DOCTYPE html>
<html>
<head>
<script 
 src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
</script>/*from   ww w  . j  a  v  a 2s.  com*/
<script>
$(document).ready(function(){
  $("p").each(function(i){
    $(this).on("click", {x:i}, function(event){
      document.getElementById("demo").innerHTML = 
         "The " + $(this).index() + ". paragraph has data: " + event.data.x;
    });
  });
});
</script>
</head>
<body>

<p id="demo"></p>
<div style="color:red">Click on each p element to return the 
data passed with the on() method.</div>

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<p>This is another paragraph.</p>

</body>
</html>

The event.data property references the optional data passed to an event method. 

event.data
Parameter Optional Description
event Required. The event parameter comes from the event binding function



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