seo site checkup logo
PricingFree ToolsArticles

JavaScript Caching Test

What is it?

Checks if your page is using caching headers for all JavaScript resources. Users browsers will check for these headers and, if any, will cache the JavaScript resources until the specified date (so that it does not keep re-fetching the unchanged file from your server). This speeds up your site the next time returning visitors arrive at your site and require the same JavaScript resource.

Pass rate:

  • Top 100 websites: 95%
  • All websites: 78%
Pass rates of Top 100 US websites
2021

98%

2022

96%

2023

95%

100

75

50

25

0

How do I fix it ?

In order to reduce the number of HTTP requests, you can use the HTTP Expires header to set an expiration time for your JavaScript resources or any other content type. You can add the following lines into your .htaccess file:
<IfModule mod_expires.c>
    ExpiresActive on
 
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
   </IfModule>
Check your website's SEO for free right now!

seo site checkup logo
Website SEO, Monitoring & Automation Made Easy.
Product
  • Pricing
  • Free Tools
  • Articles
  • Login
  • Free 7-Day Trial
© SEO Site Checkup 2020-2024 • All rights reserved