diff --git a/src/utils.ts b/src/utils.ts
index 3c8f7f93..cae821dd 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -43,6 +43,12 @@ export function hasProtocol(
   );
 }
 
+const PROTOCOL_SCRIPT_RE = /^(blob|data|javascript|vbscript):$/;
+
+export function isScriptProtocol(protocol?: string) {
+  return !!protocol && PROTOCOL_SCRIPT_RE.test(protocol);
+}
+
 const TRAILING_SLASH_RE = /\/$|\/\?/;
 
 export function hasTrailingSlash(input = "", queryParameters = false): boolean {