1 files changed, 13 insertions, 0 deletions
diff --git a/lib/extensions/global.ts b/lib/extensions/global.ts
new file mode 100644
index 0000000..a9020d7
--- /dev/null
+++ b/lib/extensions/global.ts
@@ -0,0 +1,13 @@
+/* eslint-disable no-var */
+declare global {
+	// eslint-disable-next-line @typescript-eslint/no-unused-vars
+	interface ReadonlyArray<T> {
+		includes<S, R extends `${Extract<S, string>}`>(
+			this: ReadonlyArray<R>,
+			searchElement: S,
+			fromIndex?: number
+		): searchElement is R & S;
+	}
+}
+
+export {};