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workbox-core

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This module is used by a number of the other Workbox modules to share common code.

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/* 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.js'; let supportStatus: boolean | undefined; /** * A utility function that determines whether the current browser supports * constructing a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream) * object. * * @return {boolean} `true`, if the current browser can successfully * construct a `ReadableStream`, `false` otherwise. * * @private */ function canConstructReadableStream(): boolean { if (supportStatus === undefined) { // See https://github.com/GoogleChrome/workbox/issues/1473 try { new ReadableStream({start() {}}); supportStatus = true; } catch (error) { supportStatus = false; } } return supportStatus; } export {canConstructReadableStream};