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1. The new function in the JQuery 1.7 release jQuery.Callbacks() returns an all-purpose object that provides a powerful way to manage the callback list. It can add, delete, trigger, and disable callback functions.
2. Callbacks.add () Method: Adds a callback or callback collection to the callback list. The following code:
<!DOCTYPE HTML><HTML> <Head> <MetaCharSet= "UTF-8"> <title></title> <Scripttype= "Text/javascript"src= "Js/jquery-3.1.1.min.js" ></Script> </Head> <Body> </Body> <Scripttype= "Text/javascript"> $(function(){ vartest1= function(value) {Console.info (value+"test1"); } vartest2= function(value) {Console.info (value+"test2"); } varCallbacks= $. Callbacks (); //Add Method Test1Callbacks.add (test1); //Add Method Test2Callbacks.add (test2); //pass in the specified parameter and invoke all callbacks, which must be taken with parameters, otherwise it will be displayed undefinedCallbacks.fire ("this is"); Callbacks.fire (""); Callbacks.fire (); }); </Script></HTML>
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3. Callbacks.disable () Method: Disables callbacks in the callback list, disables the use of the Callbacks.fire () method and does not result in output.
4. Callbacks.disabled () Method: Verify that the callback list is disabled. This can return a Boolean value that returns true if disabled, otherwise false.
5. Callbacks.empty () Method: Removes all callbacks from the callback list. The callback that was added earlier is gone.
6. Callbacks.fire () Method: Pass in the specified parameter and invoke all callbacks. Here is an example of the above.
7. Callbacks.firewith ([context] [, args]) method: Accesses all callbacks in the given context and argument list. If the method has more than one parameter, the callback that has fewer arguments than those parameters will get the value of the parameter from the back.
<!DOCTYPE HTML><HTML> <Head> <MetaCharSet= "UTF-8"> <title></title> <Scripttype= "Text/javascript"src= "Js/jquery-3.1.1.min.js" ></Script> </Head> <Body> </Body> <Scripttype= "Text/javascript"> $(function(){ vartest1= function(value1,value2) {console.info (value1+value2+"test1"); } vartest2= function(value) {Console.info (value+"test2"); } varCallbacks= $. Callbacks (); //Add Method Test1Callbacks.add (test1); //Add Method Test2Callbacks.add (test2); Callbacks.firewith (window,["this","is that"]); }); </Script></HTML>
8. Callbacks.fired () Method: Verify that the callback has been called at least once. If it is called at least once, it returns true, otherwise it returns false.
9. Callbacks.has () Method: Verify that a callback is provided in the callback list.
Callbacks.lock () Method: Locks the current state of the callback list.
Callbacks.locked () Method: Determines whether the callback list is locked.
Callbacks.remove () Method: Removes a callback or callback collection from the callback list.
Jquery.callbacks () Method: A Multipurpose callback list object that provides a powerful way to manage the list of callback functions.
jquery's Callback Object
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