1 files changed, 7 insertions, 0 deletions
diff --git a/django/http/request.py b/django/http/request.py
index 790e4546d7..192ade4de6 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -1,6 +1,7 @@
 import cgi
 import codecs
 import copy
+import warnings
 from io import BytesIO
 from itertools import chain
 from urllib.parse import quote, urlencode, urljoin, urlsplit
@@ -15,6 +16,7 @@ from django.http.multipartparser import MultiPartParser, MultiPartParserError
 from django.utils.datastructures import (
     CaseInsensitiveMapping, ImmutableList, MultiValueDict,
 )
+from django.utils.deprecation import RemovedInDjango40Warning
 from django.utils.encoding import escape_uri_path, iri_to_uri
 from django.utils.functional import cached_property
 from django.utils.http import is_same_domain, limited_parse_qsl
@@ -256,6 +258,11 @@ class HttpRequest:
         return self.scheme == 'https'
 
     def is_ajax(self):
+        warnings.warn(
+            'request.is_ajax() is deprecated. See Django 3.1 release notes '
+            'for more details about this deprecation.',
+            RemovedInDjango40Warning,
+        )
         return self.META.get('HTTP_X_REQUESTED_WITH') == 'XMLHttpRequest'
 
     @property