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34 lines
1.1 KiB
Text
34 lines
1.1 KiB
Text
/*
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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 = {}): Headers {
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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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