@angular/core
Version:
Angular - the core framework
79 lines • 7.75 kB
JavaScript
/**
* @license
* Copyright Google LLC 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
*/
/**
* The strategy that the default change detector uses to detect changes.
* When set, takes effect the next time change detection is triggered.
*
* @see {@link ChangeDetectorRef#usage-notes Change detection usage}
*
* @publicApi
*/
export var ChangeDetectionStrategy;
(function (ChangeDetectionStrategy) {
/**
* Use the `CheckOnce` strategy, meaning that automatic change detection is deactivated
* until reactivated by setting the strategy to `Default` (`CheckAlways`).
* Change detection can still be explicitly invoked.
* This strategy applies to all child directives and cannot be overridden.
*/
ChangeDetectionStrategy[ChangeDetectionStrategy["OnPush"] = 0] = "OnPush";
/**
* Use the default `CheckAlways` strategy, in which change detection is automatic until
* explicitly deactivated.
*/
ChangeDetectionStrategy[ChangeDetectionStrategy["Default"] = 1] = "Default";
})(ChangeDetectionStrategy || (ChangeDetectionStrategy = {}));
/**
* Defines the possible states of the default change detector.
* @see `ChangeDetectorRef`
*/
export var ChangeDetectorStatus;
(function (ChangeDetectorStatus) {
/**
* A state in which, after calling `detectChanges()`, the change detector
* state becomes `Checked`, and must be explicitly invoked or reactivated.
*/
ChangeDetectorStatus[ChangeDetectorStatus["CheckOnce"] = 0] = "CheckOnce";
/**
* A state in which change detection is skipped until the change detector mode
* becomes `CheckOnce`.
*/
ChangeDetectorStatus[ChangeDetectorStatus["Checked"] = 1] = "Checked";
/**
* A state in which change detection continues automatically until explicitly
* deactivated.
*/
ChangeDetectorStatus[ChangeDetectorStatus["CheckAlways"] = 2] = "CheckAlways";
/**
* A state in which a change detector sub tree is not a part of the main tree and
* should be skipped.
*/
ChangeDetectorStatus[ChangeDetectorStatus["Detached"] = 3] = "Detached";
/**
* Indicates that the change detector encountered an error checking a binding
* or calling a directive lifecycle method and is now in an inconsistent state. Change
* detectors in this state do not detect changes.
*/
ChangeDetectorStatus[ChangeDetectorStatus["Errored"] = 4] = "Errored";
/**
* Indicates that the change detector has been destroyed.
*/
ChangeDetectorStatus[ChangeDetectorStatus["Destroyed"] = 5] = "Destroyed";
})(ChangeDetectorStatus || (ChangeDetectorStatus = {}));
/**
* Reports whether a given strategy is currently the default for change detection.
* @param changeDetectionStrategy The strategy to check.
* @returns True if the given strategy is the current default, false otherwise.
* @see `ChangeDetectorStatus`
* @see `ChangeDetectorRef`
*/
export function isDefaultChangeDetectionStrategy(changeDetectionStrategy) {
return changeDetectionStrategy == null ||
changeDetectionStrategy === ChangeDetectionStrategy.Default;
}
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