Headers: delete() method

{{APIRef("Fetch API")}} {{AvailableInWorkers}}

The delete() method of the {{domxref("Headers")}} interface deletes a header from the current Headers object.

For security reasons, some headers can only be controlled by the user agent. These headers include the {{Glossary("Forbidden_request_header", "forbidden request headers")}} and {{Glossary("Forbidden_response_header_name", "forbidden response header names")}}.

Syntax

delete(name)

Parameters

• name
  • : The name of the HTTP header you want to delete from the Headers object.

Return value

None ({{jsxref("undefined")}}).

Examples

Creating an empty Headers object is simple:

const myHeaders = new Headers(); // Currently empty

You could add a header to this using {{domxref("Headers.append")}}:

myHeaders.append("Content-Type", "image/jpeg");
myHeaders.get("Content-Type"); // Returns 'image/jpeg'

You can then delete it again:

myHeaders.delete("Content-Type");
myHeaders.get("Content-Type"); // Returns null, as it has been deleted

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• ServiceWorker API
• HTTP access control (CORS)
• HTTP