katoikia-app/web-ui/web-react/node_modules/workbox-window/messageSW.mjs

36 lines
1.0 KiB
JavaScript

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