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Render Blocking
What is Render Blocking?
Render Blocking code is a major cause of slow Page Speed and a poor Lighthouse Score. When a browser encounters a large, external JavaScript or CSS file, it stops rendering the page until that file is downloaded and executed.
Why Render Blocking Matters in Performance?
Eliminating render-blocking issues is one of the most effective ways to instantly boost a site's loading time and technical health.
- Lighthouse Score: It directly impacts the "First Contentful Paint" and "Largest Contentful Paint" metrics, which are crucial for a high Lighthouse Score.
- Bounce Rate: Faster initial loading times reduce user frustration and prevent high Bounce Rate, especially on mobile.
- Technical SEO: It is a vital factor in meeting Google's Core Web Vitals.
Example from Flowtrix Projects
Flowtrix executes comprehensive Performance audits on all Webflow projects to identify and eliminate Render Blocking resources. We employ advanced loading techniques for JavaScript and CSS to ensure critical visual elements are loaded first, guaranteeing top-tier Page Speed and an exceptional Lighthouse Score for every client.
Categories:
Technical
Performance
Development
Related Terms:
Master Webflow.
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