25 lines
779 B
TypeScript
25 lines
779 B
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by an MIT-style license that can be
|
|
* found in the LICENSE file at https://angular.io/license
|
|
*/
|
|
import './ng_dev_mode';
|
|
|
|
/**
|
|
* This file contains reuseable "empty" symbols that can be used as default return values
|
|
* in different parts of the rendering code. Because the same symbols are returned, this
|
|
* allows for identity checks against these values to be consistently used by the framework
|
|
* code.
|
|
*/
|
|
|
|
export const EMPTY_OBJ: {} = {};
|
|
export const EMPTY_ARRAY: any[] = [];
|
|
|
|
// freezing the values prevents any code from accidentally inserting new values in
|
|
if (typeof ngDevMode !== 'undefined' && ngDevMode) {
|
|
Object.freeze(EMPTY_OBJ);
|
|
Object.freeze(EMPTY_ARRAY);
|
|
}
|