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37 lines
1.2 KiB
Text
37 lines
1.2 KiB
Text
/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import './_version.js';
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/**
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* Sends a data object to a service worker via `postMessage` and resolves with
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* a response (if any).
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*
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* A response can be set in a message handler in the service worker by
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* calling `event.ports[0].postMessage(...)`, which will resolve the promise
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* returned by `messageSW()`. If no response is set, the promise will not
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* resolve.
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*
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* @param {ServiceWorker} sw The service worker to send the message to.
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* @param {Object} data An object to send to the service worker.
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* @return {Promise<Object|undefined>}
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* @memberof workbox-window
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*/
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// Better not change type of data.
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// eslint-disable-next-line @typescript-eslint/ban-types
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function messageSW(sw: ServiceWorker, data: {}): Promise<any> {
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return new Promise((resolve) => {
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const messageChannel = new MessageChannel();
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messageChannel.port1.onmessage = (event: MessageEvent) => {
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resolve(event.data);
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};
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sw.postMessage(data, [messageChannel.port2]);
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});
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}
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export {messageSW};
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