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import { Subscription } from 'expo-modules-core';
import { KeepAwakeListener, KeepAwakeOptions } from './KeepAwake.types';
/** Default tag, used when no tag has been specified in keep awake method calls. */
export declare const ExpoKeepAwakeTag = "ExpoKeepAwakeDefaultTag";
/** @returns `true` on all platforms except [unsupported web browsers](https://caniuse.com/wake-lock). */
export declare function isAvailableAsync(): Promise<boolean>;
/**
* A React hook to keep the screen awake for as long as the owner component is mounted.
* The optionally provided `tag` argument is used when activating and deactivating the keep-awake
* feature. If unspecified, the default `tag` is used. See the documentation for `activateKeepAwakeAsync`
* below to learn more about the `tag` argument.
*
* @param tag Tag to lock screen sleep prevention. If not provided, the default tag is used.
* @param options Additional options for the keep awake hook.
*/
export declare function useKeepAwake(tag?: string, options?: KeepAwakeOptions): void;
/**
* Prevents the screen from sleeping until `deactivateKeepAwake` is called with the same `tag` value.
*
* If the `tag` argument is specified, the screen will not sleep until you call `deactivateKeepAwake`
* with the same `tag` argument. When using multiple `tags` for activation you'll have to deactivate
* each one in order to re-enable screen sleep. If tag is unspecified, the default `tag` is used.
*
* Web support [is limited](https://caniuse.com/wake-lock).
*
* @param tag Tag to lock screen sleep prevention. If not provided, the default tag is used.
* @deprecated use `activateKeepAwakeAsync` instead.
*/
export declare function activateKeepAwake(tag?: string): Promise<void>;
/**
* Prevents the screen from sleeping until `deactivateKeepAwake` is called with the same `tag` value.
*
* If the `tag` argument is specified, the screen will not sleep until you call `deactivateKeepAwake`
* with the same `tag` argument. When using multiple `tags` for activation you'll have to deactivate
* each one in order to re-enable screen sleep. If tag is unspecified, the default `tag` is used.
*
* Web support [is limited](https://caniuse.com/wake-lock).
*
* @param tag Tag to lock screen sleep prevention. If not provided, the default tag is used.
*/
export declare function activateKeepAwakeAsync(tag?: string): Promise<void>;
/**
* Releases the lock on screen-sleep prevention associated with the given `tag` value. If `tag`
* is unspecified, it defaults to the same default tag that `activateKeepAwake` uses.
*
* @param tag Tag to release the lock on screen sleep prevention. If not provided,
* the default tag is used.
*/
export declare function deactivateKeepAwake(tag?: string): Promise<void>;
/**
* Observe changes to the keep awake timer.
* On web, this changes when navigating away from the active window/tab. No-op on native.
* @platform web
*
* @example
* ```ts
* KeepAwake.addListener(({ state }) => {
* // ...
* });
* ```
*/
export declare function addListener(tagOrListener: string | KeepAwakeListener, listener?: KeepAwakeListener): Subscription;
export * from './KeepAwake.types';
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