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  • callbacks.fired()

    确定是否已经至少调用了一次回调。

    callbacks.fired()
    • 这个方法不接受任何参数
    • 返回: Boolean

    Example

    使用callbacks.fired()确定回调是否至少已经调用一次:

    // 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() );