Why JavaScript framework pages aren't shown in Google's cache view ?
Google Search sometimes keeps a copy of the HTML page that was fetched from a server and shows that to users in the form of a cache page. That is, however, really just the HTML page. For JavaScript-based websites, it gets a little bit complicated here. Because of browser security, there are restrictions on how content can be accessed from a page.
For example, if a page needs a JavaScript file from your server, browsers may block that request when it comes from other websites. In our case, the other website would be Google's cache. In practice, this means JavaScript-based websites often show an empty or an incomplete page when they're shown from Google's cache.
This is normal and not a sign of a problem. In particular, for indexing, Google will process the JavaScript separately and try to index what a user would see when they visit your website directly. This rendered version of a page is visible in Google Search Console's testing tools if you want to double-check. For the most part, Google can render and index content on JavaScript-based websites fine.
So in short, it's normal that the cache view of a JavaScript website is empty or incomplete. That's not an indication of a problem. It's just a technical restriction in browsers.
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