Technical SEO FAQ · JavaScript SEO & Rendering
What happens between Google's initial HTML fetch and JavaScript rendering?
The initial HTTP response may contain complete content or only an application shell.
Example:
<div id="app"></div>
<script src="/app.js"></script>
The rendering system can execute JavaScript and produce:
<h1>Technical SEO Course</h1>
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Google can then use the rendered output for indexing and discover additional links.
This is why comparing raw response HTML with the rendered DOM is valuable during a JavaScript SEO audit.
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