--- /dev/null
+'use strict';
+
+var indexOf = String.prototype.indexOf, slice = String.prototype.slice;
+
+module.exports = function (search, replace) {
+ var index = indexOf.call(this, search);
+ if (index === -1) return String(this);
+ return slice.call(this, 0, index) + replace +
+ slice.call(this, index + String(search).length);
+};