Advanced Topics

Learn more about Trellis’ features in these deep-dive documents. You’ll read about how a feature works and see a list of related filters and hooks, where applicable.

What’s in This Section?


Critical CSS

Critical CSS is one of Trellis’ most important features and has a big impact on Google’s Core Web Vitals.

Image Delivery and Optimizations

Trellis automatically applies first image eager loading, thumbnail optimizations, and other optional image formatting features.

Post Meta Output

Post Meta is information that can appear at the top or bottom of every post in Trellis Core and the included Bamboo, Birch, and Wisteria child themes.

Using CSS Variables

Trellis uses CSS variables to control how font, color, and layout spacing settings are applied to the Trellis Core and Bamboo, Birch, and Wisteria child themes.

Trellis Comments

Trellis offers a comments feature that improves site performance by rendering only the first five top-level comments of a post.