WKWebView

WKWebView is the high-performance framework for embedding interactive web content into iOS and macOS applications using the Nitro JavaScript engine.

Apple introduced WKWebView in iOS 8 to replace the legacy UIWebView, delivering a 20 percent boost in rendering speed and significantly lower memory overhead. It executes in a separate process to ensure app stability (preventing web crashes from killing the host app) and leverages the same Nitro engine used by Safari. Developers utilize its asynchronous architecture to handle JavaScript injection, custom URL schemes, and cookie management through classes like WKUserContentController and WKWebsiteDataStore. It is the industry standard for rendering HTML5, CSS3, and complex web apps within native Apple environments.

https://developer.apple.com/documentation/webkit/wkwebview