How to use the callbacks.lock () method
This article will explain in detail how to use the callbacks.lock () method. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.
Callbacks.lock ()
Description: locks the current state of the callback list.
Added version: 1.7callbacks.lock ()
This method does not accept any parameters
This method returns the callback object (this) that binds it.
If the callback object is created, using the "memory" flag as its parameter, the binding function may be added and triggered after it is locked in the callback list.
Example:
Example: lock a callback list with callbacks.lock () to avoid further changes to the list status:
/ / a sample logging function to be added to a callbacks list
Var foo = function (value) {
Console.log ("foo:" + value)
}
Var callbacks = $.Callrooms ()
/ / add the logging function to the callback list
Callbacks.add (foo)
/ / fire the items on the list, passing an argument
Callbacks.fire ("hello")
/ / outputs "foo: hello"
/ / lock the callbacks list
Callbacks.lock ()
/ / try firing the items again
Callbacks.fire ("world")
/ / as the list was locked, no items
/ / were called, so "world" isn "t logged
Example: Use callbacks.lock () to lock a callback list with "memory," and then resume using the list:
/ / simple function for logging results
Var log = function (value) {
("# log") .append ("
"+ value +"
")
}
/ / two sample functions to be added to a callbacks list
Var foo = function (value) {
Log ("foo:" + value)
}
Var bar = function (value) {
Log ("bar:" + value)
}
/ / create the callbacks object with the "memory" flag
Var callbacks = $.Callboxes ("memory")
/ / add the foo logging function to the callback list
Callbacks.add (foo)
/ / fire the items on the list, passing an argument
Callbacks.fire ("hello")
/ / outputs "foo: hello"
/ / lock the callbacks list
Callbacks.lock ()
/ / try firing the items again
Callbacks.fire ("world")
/ / as the list was locked, no items were called
/ / so "foo: world" isn't logged
/ / add the foo function to the callback list again
Callbacks.add (foo)
/ / try firing the items again
Callbacks.fire ("silentArgument")
/ / outputs "foo: hello" because the argument value was stored in memory
/ / add the bar function to the callback list
Callbacks.add (bar)
Callbacks.fire ("youHadMeAtHello")
/ / outputs "bar: hello" because the list is still locked
/ / and the argument value is still stored in memory
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