CSS Shake
This extension is compatible with Hyvä Themes.
CssShake is a Magento module that performs fast realtime CSS tree-shaking for
the current page. It injects used CSS into the <head> and defers loading
of all other styles.
Works for any Magento 2 theme, including Luma, Breeze, and Hyvä themes. We’ve improved Hyvä LCP performance from 2.4 seconds to 1.9 seconds by simply enabling the module.
This module can drastically decrease FCP, LCP, and improve pagespeed score. However, before using this module, please make sure that:
- TTFB is less than 0.6 seconds. Otherwise, start optimizing third-party modules.
- TBT is less than 0.6 seconds. Otherwise, start optimizing your js.
- LCP element is optimized and uses preload.
- CSS size is bigger than 30kb. Otherwise, the module may not show any visible improvements.
Our test results:
| Theme | LCP | Pagespeed Score |
|---|---|---|
| Breeze Blank (file mode) | 2.52s → 2.2s | 95 → 98 |
| Hyvä (file mode) | 2.3s → 2.0s | 97 → 98 |
| Luma (inline mode) | 2.66s → 1.86s | 91 → 95 |