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

This method throws a TypeError for the following reasons:

• The value of the name parameter is not the name of an HTTP header.
• The value of Guard is immutable.

For security reasons, some headers can only be controlled by the user agent. These headers include the forbidden header names and forbidden response header names.

name

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

None (undefined).

Creating an empty Headers object is simple:

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

You could add a header to this using 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

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