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() );