Transparent background WKWebView (NSView)

Question

I am building a Mac application using Swift. Therefor, I want to make a WKWebView transparent, so it shows the text of the loaded HTML, but the background of my underlaying NSWi

Answer 1

It was not supported, then they fixed it:

https://bugs.webkit.org/show_bug.cgi?id=134779

The way to make it transparent is to:

myWebView.opaque = false