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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Fetch API] fetch fails when undefined is passed as headers"
href="https://bugs.webkit.org/show_bug.cgi?id=168043">168043</a>
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<th>Summary</th>
<td>[Fetch API] fetch fails when undefined is passed as headers
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>New Bugs
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>torjus.bjaen@gmail.com
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<pre>When explicitly passing `undefined` to the `headers` option of `fetch()`, the promise is rejected with 'TypeError: undefined is not an object'.
To reproduce, run `fetch('/my-awesome-api', { headers: undefined })`.
Both Chrome and Firefox will accept explicitly passing `{ headers: undefined }`.
As the fetch API has been available in other browsers for quite some time now, I think passing `undefined` should be supported, as existing libraries or application may break when doesn't fall back to using a polyfill.</pre>
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