Index: frontend/node_modules/array-includes/polyfill.js
===================================================================
--- frontend/node_modules/array-includes/polyfill.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/array-includes/polyfill.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,13 @@
+'use strict';
+
+var implementation = require('./implementation');
+
+module.exports = function getPolyfill() {
+	if (
+		Array.prototype.includes
+		&& Array(1).includes(undefined) // https://bugzilla.mozilla.org/show_bug.cgi?id=1767541
+	) {
+		return Array.prototype.includes;
+	}
+	return implementation;
+};