add all frontend files

node_modules/es-abstract/2022/IsStrictlyEqual.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var SameValueNonNumeric = require('./SameValueNonNumeric');
+var Type = require('./Type');
+var BigIntEqual = require('./BigInt/equal');
+var NumberEqual = require('./Number/equal');
+
+// https://262.ecma-international.org/13.0/#sec-isstrictlyequal
+
+module.exports = function IsStrictlyEqual(x, y) {
+	if (Type(x) !== Type(y)) {
+		return false;
+	}
+	if (typeof x === 'number' || typeof x === 'bigint') {
+		return typeof x === 'number' ? NumberEqual(x, y) : BigIntEqual(x, y);
+	}
+	return SameValueNonNumeric(x, y);
+};