How can I reduce JS execution time and main-thread work on Webflow?

To reduce JS execution time and main-thread work on Webflow, you can take the following steps:

1. Minimize and Optimize JavaScript:

• Minify the JavaScript code to reduce its file size, as smaller files will load faster. You can use online tools like UglifyJS or Grunt to minify your JS code.
• Combine multiple JS files into a single one to reduce the number of requests made to the server.
• Remove unnecessary white spaces, comments, and console.log statements from your code to make it more lightweight.
• Use the async attribute when linking external JS files. This allows the browser to load the page content while simultaneously downloading and executing the JS files.

1. Optimize Images:

• Optimize your images to reduce their file size. Use image compression tools like TinyPNG or Squoosh to compress your images without compromising too much on quality.
• Serve images in modern formats like WebP, which offers better compression and faster loading times compared to traditional formats like JPEG or PNG.
• Lazy load images, which means that they will only load when they enter the viewport, reducing the initial page load time.

1. Reduce HTTP Requests:

• Combine multiple CSS and JS files into a single one using tools like Webpack or Grunt. This reduces the number of HTTP requests made by the browser.
• Use CSS sprites for multiple smaller images to minimize the number of requests needed.
• Avoid using too many external scripts or widgets from third-party services, as each of them adds an additional HTTP request to load.

1. Use Webflow's Performance Features:

• Webflow provides built-in performance features like asset optimization, caching, and compression. Ensure these settings are enabled in your project.
• Enable Webflow's GZIP compression to reduce the file size of your website's assets during transmission.
• Leverage browser caching to instruct the browser to store certain files locally, reducing the need to fetch them again on subsequent visits.

1. Evaluate and Optimize Render Blocking Elements:

• Analyze your website using tools like PageSpeed Insights or Lighthouse to identify any render-blocking elements that delay the rendering of your page.
• Minimize the use of large, complex CSS frameworks that may slow down rendering.
• Move unnecessary scripts to the bottom of your HTML document or use the "async" or "defer" attributes to load them asynchronously.

By following these steps, you can significantly reduce JS execution time and main-thread work on your Webflow website, improving overall performance and user experience.

Additional Questions:

1. How can I minify JavaScript code in Webflow?
2. What are the benefits of lazy loading images in Webflow?
3. How can I enable GZIP compression in Webflow?