In a WKWebView there is a tool called Inspector where it is possible to create "local overrides" which can override the data received. Is there a way to recreate this and read/write to these overrides?
I think the tool you are looking for is the WKUserContentController
.
The userContentController is part of the WKWebViewConfiguration
that you can provide when creating a WKWebView
The advantage that the web inspector has is that it is JavaScript running in the context of the page. Using the WKUserContentController
you could inject custom JavaScript onto the page. From there a JavaScript developer should be able to duplicate the features of the web inspector.
The userContentController
will also allow you to set content rules for handling restricted content. You might be able to use some of those rules to define content substitutions.