Seems the exactly problem I encountered. That gentleman said he used JavaScript to scroll the web page:
[webView stringByEvaluatingJavaScriptFromString:[NSString swf:@"window.location.hash='%@';",anchorName]];
To my shame, Swift language is so strange to me and I only know a little about JavaScript. So, anyone could kindly translate the sentence above to JUCE C++?
Thanks!