Add localhost as an effective domain

1 files changed, 5 insertions, 1 deletions

diff --git a/packages/browser/src/helpers/isValidDomain.ts b/packages/browser/src/helpers/isValidDomain.ts
index ee68818..2eb146f 100644
--- a/packages/browser/src/helpers/isValidDomain.ts
+++ b/packages/browser/src/helpers/isValidDomain.ts
@@ -7,5 +7,9 @@
  * https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch08s15.html
  */
 export function isValidDomain(hostname: string): boolean {
-  return /^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$/i.test(hostname);
+  return (
+    // Consider localhost valid as well since it's okay wrt Secure Contexts
+    hostname === 'localhost'
+    || /^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$/i.test(hostname)
+  );
 }