[Swift] Wait for JS to fully evaluate before getting HTML

[stephen_fung]

 func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
	webView.evaluateJavaScript("document.documentElement.innerHTML.toString()", completionHandler: { (html: Any?, error: Error?) in
        print(html)
                })
        }

The HTML printed is before the Javascript is fully evaluated. Can someone tell me why? Is it because there are two javascript cycles? Is there a parameter for Javascript string that will allow me to see the fully rendered HTML?

 

URL being tested: https://www.fedex.com/apps/fedextrack/index.html?tracknumbers=74893150311361418402&cntry_code=us

[Mira Yurizaki]

Looking at the page's source, it looks like it was designed to load the bulk of the main JavaScript code after the HTML has been read.

 

It could also be this function fully parses the HTML then requests any scripts/stylesheets after the fact.