callbacks.fired()

jQuery

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callbacks.fired()

Categories: Callbacks Object

callbacks.fired() Returns: Boolean

Description: Determine if the callbacks have already been called at least once.

  • version added: 1.7callbacks.fired()

    • This method does not accept any arguments.

Example

Use callbacks.fired() to determine if the callbacks in a list have been called at least once:

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

                                

                                

                                  

                                    var foo = function( value ) {
                                  

                                

                                

                                  

                                      console.log( "foo:" + value );
                                  

                                

                                

                                  

                                    };
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    var callbacks = $.Callbacks();
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // add the function "foo" to the list
                                    
                                  

                                

                                

                                  

                                    callbacks.add( foo );
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // fire the items on the list
                                    
                                  

                                

                                

                                  

                                    callbacks.fire( "hello" ); // outputs: "foo: hello"
                                  

                                

                                

                                  

                                    callbacks.fire( "world" ); // outputs: "foo: world"
                                  

                                

                                

                                  

                                     
                                  

                                

                                

                                  

                                    
                                      // test to establish if the callbacks have been called
                                    
                                  

                                

                                

                                  

                                    console.log( callbacks.fired() );
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