PrestaHeroes — PrestaShop & Shopify Growth Agency
US-Focused UX · Conversion Features · Revenue Growth
All modules include: 1 year of free upgrades, security updates & automatic version notifications
JavaPro – Preload JavaScript to Improve Core Web Vitals
$100.00 USD
Unlock instant above-the-fold speed for your PrestaShop store—JavaPro removes render-blocking JavaScript, delivering your most important content first for a faster, smoother shopping experience. Learn more
Preload JavaScript for Faster PrestaShop Performance
JavaPro gives you practical control over how JavaScript loads in PrestaShop, with a strong focus on attribute preload to help important scripts load earlier and support better Core Web Vitals.
It also includes support for async and defer, giving you flexible per-file control without editing theme files or manually changing templates.
Why merchants use JavaPro
- Preload important JavaScript so browsers discover critical files earlier
- Improve Core Web Vitals and reduce front-end loading friction
- Support async and defer for compatibility and fine-tuned script delivery
- Control each JavaScript file individually from the module admin
- Choose header or footer loading for better storefront behavior
- Avoid theme edits and manage script loading from one place
Built with preload first
Many JavaScript optimization tools focus on async and defer alone, but for real shops, the biggest win is often making sure important files are found sooner.
That is why JavaPro puts the emphasis on attribute preload while still supporting async and defer where they make sense.
What JavaPro does
JavaPro helps you take control of front-office JavaScript loading in PrestaShop. Instead of accepting whatever your theme and third-party modules output, you can decide how each file should be delivered.
Important scripts can be preloaded so they begin loading sooner. Less critical files can use defer to reduce render pressure, while special cases can use async where appropriate.
This gives merchants and agencies a cleaner, more deliberate way to optimize script loading and improve perceived speed.
Why preload matters for PrestaShop
PrestaShop themes and modules often add many JavaScript files, and not all of them load in a way that supports performance. When important files are discovered too late, pages can feel heavier and slower than they should.
JavaPro helps solve that by letting you prioritize the scripts that matter most. This can improve the visitor experience, reduce loading delays above the fold, and support stronger speed signals for your shop.
Made for real storefront control
JavaPro is ideal for merchants, developers, and agencies who want more control over JavaScript loading without custom code changes every time a module adds another asset.
It gives you one central place to review script behavior and apply the strategy that best fits each file: preload, async, or defer.
| PrestaShop Module Zip Versions |
1.7.x, 8.x, PS9 |
|---|
QUESTIONS & ANSWERS
Ask a Question-
Hello, I manage TAKANAP.COM server and website and would like to know if it is possible to have a trial of the module "Boost Performance Remove Render Blocking JavaScript", since it is a bit expensive. If it works well we have not problems on paying. Thanks
Hi, sorry for tardy response.
At this time and because of the nature of the module it's not possible for us to setup a PS as demo.
This module is completley tested, has a built in demo mode you can set so that changes are only displayed to certain ip(s).
While we are very good developers our module publications could be better.
Kind regards,
Fred
