1 files changed, 24 insertions, 0 deletions
diff --git a/app/assets/javascripts/lib/utils/url_utility.js b/app/assets/javascripts/lib/utils/url_utility.js
index 48abc072675..d68b41b7f7a 100644
--- a/app/assets/javascripts/lib/utils/url_utility.js
+++ b/app/assets/javascripts/lib/utils/url_utility.js
@@ -545,3 +545,27 @@ export function getURLOrigin(url) {
     return null;
   }
 }
+
+/**
+ * Returns `true` if the given `url` resolves to the same origin the page is served
+ * from; otherwise, returns `false`.
+ *
+ * The `url` may be absolute or relative.
+ *
+ * @param {string} url The URL to check.
+ * @returns {boolean}
+ */
+export function isSameOriginUrl(url) {
+  if (typeof url !== 'string') {
+    return false;
+  }
+
+  const { origin } = window.location;
+
+  try {
+    return new URL(url, origin).origin === origin;
+  } catch {
+    // Invalid URLs cannot have the same origin
+    return false;
+  }
+}