callbacks.empty()

jQuery

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callbacks.empty()

Categories: Callbacks Object

callbacks.empty() Returns: Callbacks

Description: Remove all of the callbacks from a list.

  • version added: 1.7callbacks.empty()

    • This method does not accept any arguments.

This method returns the Callbacks object onto which it is attached (this).

Example

Use callbacks.empty() to empty a list of callbacks:

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                                      // a sample logging function to be added to a callbacks list
                                    
                                  

                                

                                

                                  

                                    var foo = function( value1, value2 ) {
                                  

                                

                                

                                  

                                      console.log( "foo: " + value1 + "," + value2 );
                                  

                                

                                

                                  

                                    }
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // another function to also be added to the list
                                    
                                  

                                

                                

                                  

                                    var bar = function( value1, value2 ){
                                  

                                

                                

                                  

                                        console.log( "bar: " + value1 + "," + value2 );
                                  

                                

                                

                                  

                                    }
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    var callbacks = $.Callbacks();
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // add the two functions
                                    
                                  

                                

                                

                                  

                                    callbacks.add( foo );
                                  

                                

                                

                                  

                                    callbacks.add( bar );
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // empty the callbacks list
                                    
                                  

                                

                                

                                  

                                    callbacks.empty();
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // check to ensure all callbacks have been removed
                                    
                                  

                                

                                

                                  

                                    console.log( callbacks.has( foo ) );
                                  

                                

                                

                                  

                                    
                                      // false
                                    
                                  

                                

                                

                                  

                                    console.log( callbacks.has( bar ) );
                                  

                                

                                

                                  

                                    
                                      // false
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