# callbacks.locked()

## callbacks.locked ( ) Returns: Boolean version added: 1.7

Description: Determine if the callbacks list has been locked.

## Examples:

#### Example: 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
    callbacks.add( foo );

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

    // Lock the callbacks list
    callbacks.lock();

    // Test the lock-state of the list
    console.log ( callbacks.locked() );
    // true