Return the response header named header, or null if not found.
See also HTTP response headers for a list of common response headers.
@Unstable() String? getResponseHeader(String name) native;
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-html/HttpRequest/getResponseHeader.html