UIWebView delegate method shouldStartLoadWithRequest: equivalent in WKWebView?

Question

I have a module inside my iOS 7+ app which is a UIWebView. The html page loads a javascript that creates custom-shaped buttons (using the Raphaeljs library). With UIWebView,

Answer 1

To answer the original question, the equivalent of webView:shouldStartLoadWithRequest:navigationType: in UIWebView is webView:decidePolicyForNavigationAction:decisionHandler: in WKWebView. These methods are called before each request is made (including the initial request) and provide the ability to allow/disallow it.