CORS Preflight
Embed This Widget
Add the script tag and a data attribute to embed this widget.
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<iframe src="proxy.php?url=https%3A%2F%2Fstatuscodefyi.com%2Fiframe%2Fglossary%2Fcors-preflight%2F" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://statuscodefyi.com/glossary/cors-preflight/Add a dynamic SVG badge to your README or docs.
[](https://statuscodefyi.com/glossary/cors-preflight/)Use the native HTML custom element.
An automatic OPTIONS request sent by browsers before cross-origin requests with non-simple methods or headers, checking if the server allows the actual request.