jQuery | event.namespace Property

Last Updated : 20 Feb, 2019

The event.namespace property in jQuery is used to return the custom namespace whenever the event is triggered. It is used to handle tasks differently depending on the namespace used.

Syntax:

event.namespace

Parameters: This property contains single parameter event which is required. It returns the custom namespace and it comes from the event binding function.

Example 1: This example uses event.namespace property to return and remove namespace.

<!DOCTYPE html> 
<html> 
      
<head> 
    <title> 
        jQuery event.namespace Property 
    </title> 
      
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"> 
    </script> 
      
    <!-- Script to use event.namespace property -->
    <script> 
        $(document).ready(function() { 
            $("h3").on("custom.someNamespace", function(event) { 
                alert(event.namespace); 
            }); 
              
            $("h3").click(function(event) { 
                $(this).trigger("custom.someNamespace"); 
            });   
        
            $("button").click(function() { 
                $("h3").off("custom.someNamespace"); 
            }); 
    });   
    </script> 
</head> 
  
<body> 
    <center> 
   
        <h1>Welcome to GeeksforGeeks!.</h1>  
          
        <div style="background-color:green"> 
            <h3> Click here Geeks for Geeks.</h3> 
            <button>Remove namespace</button> 
        </div> 
      
    </center> 
 </body> 
  
</html> 

Output:
Before Click on element h3:

After Click on element h3:

Example 2: This example uses click.mySomething namespace to slideToggle the content.

<!DOCTYPE html> 
<html> 
      
<head> 
    <title> 
        jQuery event.namespace Property 
    </title> 
      
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"> 
    </script> 
      
    <!-- Script to use event.namespace to  
        slideToggle content -->
    <script> 
        $(document).ready(function() { 
            $("h3").on("click.mySomething", function() { 
                $(this).slideToggle(); 
            }); 
             
            $("button").click(function() { 
                $("h3").off("click.mySomething"); 
            }); 
        }); 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1>Welcome to GeeksforGeeks!.</h1>  
          
        <div style="background-color:green"> 
            <h3>1st statement : Geeks for Geeks.</h3> 
            <h3>2nd statement : Mathematics</h3> 
            <button>Click to remove namespace</button> 
        </div> 
    </center> 
 </body> 
  
</html> 

Output:
Before Click on the first statement:

After Click on the first statement:

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