--- /dev/null
+var DESCRIPTORS = require('../internals/descriptors');
+var objectDefinePropertyModule = require('../internals/object-define-property');
+var regExpFlags = require('../internals/regexp-flags');
+var UNSUPPORTED_Y = require('../internals/regexp-sticky-helpers').UNSUPPORTED_Y;
+
+// `RegExp.prototype.flags` getter
+// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
+if (DESCRIPTORS && (/./g.flags != 'g' || UNSUPPORTED_Y)) {
+ objectDefinePropertyModule.f(RegExp.prototype, 'flags', {
+ configurable: true,
+ get: regExpFlags
+ });
+}