GoScrobble/web/node_modules/workbox-routing/utils/getOrCreateDefaultRouter.js

27 lines
744 B
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 { Router } from '../Router.js';
import '../_version.js';
let defaultRouter;
/**
* Creates a new, singleton Router instance if one does not exist. If one
* does already exist, that instance is returned.
*
* @private
* @return {Router}
*/
export const getOrCreateDefaultRouter = () => {
if (!defaultRouter) {
defaultRouter = new Router();
// The helpers that use the default Router assume these listeners exist.
defaultRouter.addFetchListener();
defaultRouter.addCacheListener();
}
return defaultRouter;
};