jQuery | event.which property with Examples

Last Updated : 12 Feb, 2019

The event.which is an inbuilt property in jQuery which is used to return which keyboard key or mouse button was pressed for the event.
Syntax:

event.which

Parameter: It does not accept any parameter because it is a property not a function.
Return Value: It returns which keyboard key or mouse button was pressed.

jQuery code to show the working of this property:
Code #1:
In the below code, ascii value of the key is displayed.

<html> 
  
<head> 
    <script src="https://code.jquery.com/jquery-1.10.2.js"> 
    </script> 
    <script> 
        $(document).ready(function() { 
            <!-- jQuery code to show event.which property -->
            $("input").keydown(function(event) { 
                $("div").html("Key: " + event.which); 
            }); 
        }); 
    </script> 
    <style> 
        div { 
            margin: 20px; 
            width: 80px; 
            height: 60px; 
            padding: 20px; 
            border: 2px solid green; 
        } 
    </style> 
</head> 
  
<body> 
    <!-- Here ascii value of the key will be shown -->
    <div> 
        <p></p> 
    </div> 
    Name : 
    <input type="text"> 
</body> 
  
</html> 

Output:
Ascii value of “G” is shown-

Code #2:
In the below code, which mouse button was pressed is displayed.

<html> 
  
<head> 
    <script 
    src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"> 
    </script> 
    <script> 
        <!-- jQuery code to show event.which property -->
        $(document).ready(function() { 
            $("div").mousedown(function(event) { 
                $("div").append("<br>Mouse button : " + event.which); 
            }); 
        }); 
    </script> 
    <style> 
        div { 
            border: 2px solid green; 
            width: 400px; 
            height: 300px; 
            padding: 20px; 
        } 
    </style> 
</head> 
  
<body> 
    <!-- click inside and see -->
    <div style="">Click anywhere in this box !!!</div> 
</body> 
  
</html> 

Output:
When left button of mouse is clicked:

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