Updated on December 9th, 2024 at 08:46 pm
Estimated reading time: 2 minutes
Issue: Using more than 100 JavaScript and CSS files on a page slows it down because each file requires a separate HTTP request, leading to longer load times, poor user experience, and lower search rankings.
Fix: Remove unnecessary JavaScript and CSS files, and combine essential ones to reduce the number of HTTP requests.
How to Fix for Beginners
- Identify Excessive Files: Use browser developer tools or an SEO tool to check how many JavaScript and CSS files your pages load.
- Example: Your page loads 120 files, but many are unused or redundant.
- Remove Unnecessary Files: Look for scripts or styles that aren’t critical to your page and delete them.
- Example: Unused animation libraries or outdated CSS files.
- Combine Files: Merge multiple CSS files into one and multiple JavaScript files into one where possible.
- Example: Combine
styles1.css
,styles2.css
, andstyles3.css
into a singlestyles.css
file.
- Example: Combine
- Minify Files: Compress your combined JavaScript and CSS files to reduce file size.
- Example: Use tools like UglifyJS or CSSNano to remove unnecessary characters from the code.
- Implement Asynchronous Loading: Load JavaScript files asynchronously or defer their execution to prioritize visible content.
- Example: Add the
async
ordefer
attribute to your<script>
tags.
- Example: Add the
- Test Page Speed: After cleanup, use tools like Google PageSpeed Insights to check your page’s performance and ensure improvements.
Tip: Fewer, optimized JavaScript and CSS files enhance page load speed, user experience, and SEO rankings.
More articles relating to JavaScript issues:
- How to fix: Issues with unminified JavaScript and CSS files
- How to fix: Pages use too many JavaScript and CSS files
- How to fix: Issues with broken external JavaScript and CSS files
- How to fix: Pages have a JavaScript and CSS total size that is too large
- How to fix: Issues with uncached JavaScript and CSS files
- How to fix: Issues with uncompressed JavaScript and CSS files
- How to fix: Issues with broken internal JavaScript and CSS files