What can I do about the render-blocking resource and unused javascript files in Webflow to improve page speed in Lighthouse?

Published on
September 22, 2023

To improve page speed in Lighthouse and address render-blocking resources and unused JavaScript files in Webflow, you can follow these steps:

  1. Minify and concatenate CSS and JavaScript files:
  • Minifying these files reduces their size by removing unnecessary spaces, comments, and other unnecessary characters without affecting functionality.
  • Concatenating the files combines multiple CSS or JavaScript files into a single file, reducing the number of HTTP requests required to load the webpage.
  1. Optimize and compress images:
  • Large image files can significantly affect page loading speed.
  • Optimize images by resizing them to the appropriate dimensions and compressing them without compromising their quality.
  • Webflow has built-in image optimization capabilities, including compression and responsive image loading, which can improve page performance.
  1. Remove or defer render-blocking JavaScript:
  • Render-blocking resources can delay the rendering of a webpage.
  • Analyze the JavaScript files used on your page and determine if any are critical for the initial page load.
  • You can either remove non-essential JavaScript or use the async or defer attributes to load JavaScript files after the initial page content has finished rendering.
  1. Use Webflow's built-in loading enhancements:
  • Webflow provides options to optimize loading, such as lazy loading for images and videos.
  • Utilize these features to ensure that resources are loaded when they are needed, improving page speed.
  1. Enable caching and leverage browser caching:
  • Caching allows the browser to store resources locally, reducing the need to request them from the server on subsequent visits.
  • Enable caching for static resources such as CSS, JavaScript, and images.
  • Set appropriate cache control headers and leverage browser caching to improve subsequent page loads.
  1. Optimize critical rendering path:
  • Prioritize content above-the-fold, ensuring that the most important parts of the page are loaded and rendered quickly.
  • Use inline CSS or critical CSS to minimize the delay in rendering the initial viewable portion of the page.

By following these steps, you can significantly improve page speed in Lighthouse and address render-blocking resources and unused JavaScript files in your Webflow website.

Additional Questions:

  1. How can I minify and concatenate CSS and JavaScript files in Webflow?
  2. What steps can I take to optimize images in Webflow?
  3. How can I leverage Webflow's loading enhancements to improve page speed?