How to use jQuery.Callbacks ()
This article mainly introduces how to use jQuery.Callbacks (), has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.
JQuery.Callbacks (flags)
Description: a multi-purpose callback list object that provides a powerful way to manage callback function lists.
Added version: 1.7jQuery.Callbacks (flags)
Flags
Type: String
An optional list of flags separated by space tags to change the behavior in the callback list.
The $.ajax () and $.Deferred () basic functional components of jQuery are provided inside $. Callable (). It can be used as a function of a new component similar to the basic definition.
Methods supported by $. Callers (), including callbacks.add (), callbacks.remove (), callbacks.fire () and callbacks.disable ().
Getting started (getting started)
Here are two sample methods named fn1 and fn2:
Function fn1 (value) {
Console.log (value)
}
Function fn2 (value) {
Fn1 ("fn2 says:" + value)
Return false
}
These can be added as callback functions as a list of $.Callbacks and called as follows:
Var callbacks = $.Callrooms ()
Callbacks.add (fn1)
/ / outputs: foo!
Callbacks.fire ("foo!")
Callbacks.add (fn2)
/ / outputs: bar!, fn2 says: bar!
Callbacks.fire ("bar!")
As a result, it makes it easy to construct a complex list of callbacks, and the input values can be easily used as needed by as many functions as possible.
The above two specific methods: .add () and .fire () .add () support adding new callback lists, while .fire () provides a way to handle callback methods in the same list.
The other method, by .remove () of $.Callbacks, removes a specific callback from the callback list. Here is an example of the use of .remove ():
Var callbacks = $.Callrooms ()
Callbacks.add (fn1)
/ / outputs: foo!
Callbacks.fire ("foo!")
Callbacks.add (fn2)
/ / outputs: bar!, fn2 says: bar!
Callbacks.fire ("bar!")
Callbacks.remove (fn2)
/ / only outputs foobar, as fn2 has been removed.
Callbacks.fire ("foobar")
Supported Flags (supported Flags)
This flags parameter is an optional parameter for $. Callbacks () and is structured as an optional list of flags separated by space tags to change the behavior in the callback list (for example. $.Callflower ('unique stopOnFalse')).
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