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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;
- /**
- * 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() {
- 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 };
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