Once you test a URL, you can view the rendered HTML, page loading issues and a JavaScript console containing warnings and errors. And remember, this is the desktop render, not mobile.

This guide explains exactly how you can test whether the JavaScript on your website renders properly. Plus: 7 tools for testing and debugging JavaScript.

While Google attempts to render every URL Googlebot crawled, rendering may fail for various reasons. This means that if you set a JavaScript redirect, Google might never see it if rendering of the ...