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66 lines
2.6 KiB
TypeScript
66 lines
2.6 KiB
TypeScript
import { CacheDidUpdateCallbackParam } from 'workbox-core/types.js';
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import './_version.js';
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export interface BroadcastCacheUpdateOptions {
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headersToCheck?: string[];
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generatePayload?: (options: CacheDidUpdateCallbackParam) => Record<string, any>;
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}
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/**
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* Uses the `postMessage()` API to inform any open windows/tabs when a cached
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* response has been updated.
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*
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* For efficiency's sake, the underlying response bodies are not compared;
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* only specific response headers are checked.
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*
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* @memberof module:workbox-broadcast-update
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*/
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declare class BroadcastCacheUpdate {
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private readonly _headersToCheck;
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private readonly _generatePayload;
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/**
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* Construct a BroadcastCacheUpdate instance with a specific `channelName` to
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* broadcast messages on
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*
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* @param {Object} options
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* @param {Array<string>} [options.headersToCheck=['content-length', 'etag', 'last-modified']]
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* A list of headers that will be used to determine whether the responses
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* differ.
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* @param {string} [options.generatePayload] A function whose return value
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* will be used as the `payload` field in any cache update messages sent
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* to the window clients.
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*/
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constructor({ headersToCheck, generatePayload, }?: BroadcastCacheUpdateOptions);
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/**
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* Compares two [Responses](https://developer.mozilla.org/en-US/docs/Web/API/Response)
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* and sends a message (via `postMessage()`) to all window clients if the
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* responses differ (note: neither of the Responses can be
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* {@link http://stackoverflow.com/questions/39109789|opaque}).
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*
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* The message that's posted has the following format (where `payload` can
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* be customized via the `generatePayload` option the instance is created
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* with):
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*
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* ```
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* {
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* type: 'CACHE_UPDATED',
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* meta: 'workbox-broadcast-update',
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* payload: {
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* cacheName: 'the-cache-name',
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* updatedURL: 'https://example.com/'
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* }
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* }
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* ```
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*
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* @param {Object} options
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* @param {Response} [options.oldResponse] Cached response to compare.
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* @param {Response} options.newResponse Possibly updated response to compare.
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* @param {Request} options.request The request.
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* @param {string} options.cacheName Name of the cache the responses belong
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* to. This is included in the broadcast message.
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* @param {Event} [options.event] event An optional event that triggered
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* this possible cache update.
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* @return {Promise} Resolves once the update is sent.
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*/
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notifyIfUpdated(options: CacheDidUpdateCallbackParam): Promise<void>;
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}
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export { BroadcastCacheUpdate };
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