diff --git a/web/src/hash_parser.ts b/web/src/hash_parser.ts
index 16e8d7032b..c51cb0ecb9 100644
--- a/web/src/hash_parser.ts
+++ b/web/src/hash_parser.ts
@@ -111,6 +111,11 @@ export function is_subscribers_section_opened_for_stream(): boolean {
     return hash_components[3] === "subscribers";
 }
 
+export function is_in_specified_hash_category(hash_categories: string[]): boolean {
+    const main_hash = get_hash_category(window.location.hash);
+    return hash_categories.includes(main_hash);
+}
+
 export const allowed_web_public_narrows = [
     "channels",
     "channel",
diff --git a/web/tests/hash_util.test.js b/web/tests/hash_util.test.js
index ae0ec5eb0d..149fb24ee1 100644
--- a/web/tests/hash_util.test.js
+++ b/web/tests/hash_util.test.js
@@ -178,6 +178,26 @@ run_test("test_is_subscribers_section_opened_for_stream", () => {
     assert.equal(hash_parser.is_subscribers_section_opened_for_stream(), false);
 });
 
+run_test("test_is_in_specified_hash_category", () => {
+    window.location.hash = "#channels/1/Design/subscribers";
+    assert.equal(hash_parser.is_in_specified_hash_category(["channels", "channel"]), true);
+
+    window.location.hash = "#channels/99/.EC.A1.B0.EB.A6.AC.EB.B2.95.20.F0.9F.98.8E/subscribers";
+    assert.equal(hash_parser.is_in_specified_hash_category(["channels", "channel"]), true);
+
+    window.location.hash = "#gro/channels/channel";
+    assert.equal(hash_parser.is_in_specified_hash_category(["stream", "channel", "group"]), false);
+
+    window.location.hash = "#some/stream/channel/group";
+    assert.equal(hash_parser.is_in_specified_hash_category(["stream", "channel", "group"]), false);
+
+    window.location.hash = "#some/stream/channel/group";
+    assert.equal(hash_parser.is_in_specified_hash_category([""]), false);
+
+    window.location.hash = "#some/stream/channel/group";
+    assert.equal(hash_parser.is_in_specified_hash_category([]), false);
+});
+
 run_test("test_parse_narrow", () => {
     assert.deepEqual(hash_util.parse_narrow(["narrow", "stream", "99-frontend"]), [
         {negated: false, operator: "stream", operand: "frontend"},