Determine if the callbacks list has been locked.

.callbacks.locked()🡢 Boolean

Use callbacks.locked() to determine the lock-state of a callback list:

// A sample logging function to be added to a callbacks list
var foo = function (value) {
  console.log("foo: " + value);

var callbacks = $.Callbacks();

// Add the logging function to the callback list

// Fire the items on the list, passing an argument"hello");
// Outputs "foo: hello"

// Lock the callbacks list

// Test the lock-state of the list
// true

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