# JavaScript & SEO — SEO for Developers
Source: https://www.geekswithgeeks.com/en/seo-developers/seo-javascript-seo
> Understand how Google indexes JavaScript-heavy sites and when to use prerendering or SSR.
## The JavaScript problem
Google *can* render JavaScript, but it's not instant. If your content loads only after JS runs, there's a delay before indexing. The initial HTML must contain meaningful content; if it's empty, Google will see an empty page.
## Check what Google sees
Use the URL Inspection tool in Google Search Console to see how Google renders your page. This reveals if content is hidden behind JavaScript.
```html
My Blog Post
My Blog Post Title
Post content visible without JS...
```