Optimised the hash retrieval from URL

Changelog: changed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/65854

app/assets/javascripts/lib/utils/url_utility.js

@@ -209,11 +209,7 @@ export function removeParams(params, url = window.location.href, skipEncoding =
   return `${root}${writableQuery}${writableFragment}`;
 }
 
-export function getLocationHash(url = window.location.href) {
-  const hashIndex = url.indexOf('#');
-
-  return hashIndex === -1 ? null : url.substring(hashIndex + 1);
-}
+export const getLocationHash = (hash = window.location.hash) => hash.split('#')[1];
 
 /**
  * Returns a boolean indicating whether the URL hash contains the given string value

spec/frontend/lib/utils/url_utility_spec.js

@@ -319,19 +319,17 @@ describe('URL utility', () => {
   });
 
   describe('doesHashExistInUrl', () => {
-    it('should return true when the given string exists in the URL hash', () => {
+    beforeEach(() => {
       setWindowLocation({
-        href: 'https://gitlab.com/gitlab-org/gitlab-test/issues/1#note_1',
+        hash: 'https://gitlab.com/gitlab-org/gitlab-test/issues/1#note_1',
       });
+    });
 
+    it('should return true when the given string exists in the URL hash', () => {
       expect(urlUtils.doesHashExistInUrl('note_')).toBe(true);
     });
 
     it('should return false when the given string does not exist in the URL hash', () => {
-      setWindowLocation({
-        href: 'https://gitlab.com/gitlab-org/gitlab-test/issues/1#note_1',
-      });
-
       expect(urlUtils.doesHashExistInUrl('doesnotexist')).toBe(false);
     });
   });