JavaScriptCore framework gives full access to JS runtime.<a href="https:&#x2F;&#x2F;www.bignerdranch.com&#x2F;blog&#x2F;javascriptcore-and-ios-7&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.bignerdranch.com&#x2F;blog&#x2F;javascriptcore-and-ios-7&#x2F;</a>