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characters

返回值:undefined

callbacks.lock()

V1.7概述

鎖定在其當(dāng)前狀態(tài)的回調(diào)列表。

示例

描述:

用 callbacks.lock()鎖定一個(gè)回調(diào)列表，以避免進(jìn)一步的修改列表狀態(tài) :

jQuery 代碼:
// 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();

// try firing the items again
callbacks.fire( 'world' );

// as the list was locked, no items
// were called so 'world' isn't logged


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