javascript - Is this a bug of jQuery Callback? -


i looking source code of jquery 1.8.1, , found there maybe wrong jquery:

first, disable callback using disable(), call empty(), add function using add(), call fire(), api explains disable() :

disable callback list doing more

the last call fire() should output nothing, actually, output '2' if disable() not called;

var = $.callbacks(); a.add(function(){console.log('1');}); a.disable(); a.disabled();  //true a.empty(); a.add(function(){console.log('2');}); a.fire();   //2

so jquery bug?

it's not bug in jquery, @ least not inside disable. calling disable indeed make callbacks object inert practical purposes.

your code sample calls empty, re-initializes callbacks object , in doing returns in usable state. that might bug, since empty not documented this.

removing call empty results in expected behavior.


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