During this lockdown I am learning Swift on MacOS and have hit a wall in trying to create a PDF file from an HTML string

I have the HTML string being displayed in a WKWebView, but any attempt to print it or save it to a PDF produces a blank page.

for exampe: -

    wkWebView.printView(self)

or

    let pdf = wkWebView.dataWithPDF(inside: wkWebView.frame)
    let pdfDocument = PDFDocument(data: pdf)
    pdfDocument?.write(toFile: "test.pdf")

Can anyone give me some example code that can produce a PDF from the HTML ?

Many thanks

Have you find a solution ?