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import { WorkboxPlugin } from 'workbox-core/types.js';
import { BroadcastCacheUpdateOptions } from './BroadcastCacheUpdate.js';
import './_version.js';
/**
* This plugin will automatically broadcast a message whenever a cached response
* is updated.
*
* @memberof workbox-broadcast-update
*/
declare class BroadcastUpdatePlugin implements WorkboxPlugin {
private readonly _broadcastUpdate;
/**
* Construct a {@link workbox-broadcast-update.BroadcastUpdate} instance with
* the passed options and calls its `notifyIfUpdated` method whenever the
* plugin's `cacheDidUpdate` callback is invoked.
*
* @param {Object} [options]
* @param {Array<string>} [options.headersToCheck=['content-length', 'etag', 'last-modified']]
* A list of headers that will be used to determine whether the responses
* differ.
* @param {string} [options.generatePayload] A function whose return value
* will be used as the `payload` field in any cache update messages sent
* to the window clients.
*/
constructor(options?: BroadcastCacheUpdateOptions);
/**
* A "lifecycle" callback that will be triggered automatically by the
* `workbox-sw` and `workbox-runtime-caching` handlers when an entry is
* added to a cache.
*
* @private
* @param {Object} options The input object to this function.
* @param {string} options.cacheName Name of the cache being updated.
* @param {Response} [options.oldResponse] The previous cached value, if any.
* @param {Response} options.newResponse The new value in the cache.
* @param {Request} options.request The request that triggered the update.
* @param {Request} options.event The event that triggered the update.
*/
cacheDidUpdate: WorkboxPlugin['cacheDidUpdate'];
}
export { BroadcastUpdatePlugin };