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 NSWindow is visible. I tried

webView.layer?.backgroundColor = NSColor.clearColor().CGColor;

which hadn't any effect. WKWebView inherits from NSView, but I don't know if this helps.

Another solution would be to insert a NSVisualEffectView as the background of the WebView, but I don't know how to accomplish that, either!

Answer 1

Use this in macOS 10.12 and higher:

webView.setValue(false, forKey: "drawsBackground")

Answer 2

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