示例

描述:

使用callbacks.fired() 确定，如果列表中的回调至少有一次被呼叫

jQuery 代码:

// 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() );