--- /dev/null
+'use strict';
+var charAt = require('../internals/string-multibyte').charAt;
+var InternalStateModule = require('../internals/internal-state');
+var defineIterator = require('../internals/define-iterator');
+
+var STRING_ITERATOR = 'String Iterator';
+var setInternalState = InternalStateModule.set;
+var getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);
+
+// `String.prototype[@@iterator]` method
+// https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator
+defineIterator(String, 'String', function (iterated) {
+ setInternalState(this, {
+ type: STRING_ITERATOR,
+ string: String(iterated),
+ index: 0
+ });
+// `%StringIteratorPrototype%.next` method
+// https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next
+}, function next() {
+ var state = getInternalState(this);
+ var string = state.string;
+ var index = state.index;
+ var point;
+ if (index >= string.length) return { value: undefined, done: true };
+ point = charAt(string, index);
+ state.index += point.length;
+ return { value: point, done: false };
+});