31 lines
726 B
JavaScript
31 lines
726 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.mjs';
|
||
|
|
import '../_version.mjs';
|
||
|
|
|
||
|
|
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;
|
||
|
|
};
|