Implement the following code in the webview’s WebFrameLoadDelegate delegate method:

#pragma mark -
#pragma mark - WebViewDelegate
- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
    [sender stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.overflow='hidden'"];
}

Note: the code above is for macOS development.