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31 lines
1.1 KiB
31 lines
1.1 KiB
/* |
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Copyright 2018 Google LLC |
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Use of this source code is governed by an MIT-style |
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license that can be found in the LICENSE file or at |
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https://opensource.org/licenses/MIT. |
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*/ |
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import '../_version.js'; |
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/** |
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* This is a utility method that determines whether the current browser supports |
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* the features required to create streamed responses. Currently, it checks if |
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* [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream) |
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* is available. |
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* |
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* @private |
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* @param {HeadersInit} [headersInit] If there's no `Content-Type` specified, |
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* `'text/html'` will be used by default. |
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* @return {boolean} `true`, if the current browser meets the requirements for |
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* streaming responses, and `false` otherwise. |
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* |
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* @memberof workbox-streams |
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*/ |
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function createHeaders(headersInit = {}) { |
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// See https://github.com/GoogleChrome/workbox/issues/1461 |
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const headers = new Headers(headersInit); |
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if (!headers.has('content-type')) { |
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headers.set('content-type', 'text/html'); |
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} |
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return headers; |
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} |
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export { createHeaders };
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