How to Audit and Optimize Block Theme Rendering for Sub-Second Load Times
A complete block theme rendering audit workflow: profiling block render times with Query Monitor, measuring DOM complexity, caching dynamic blocks, and validati…
Writing · WordPress
WordPress
All posts in the WordPress category. Search across the full archive or pick another topic below.
How to Generate Critical CSS for Block Themes to Improve First Contentful Paint
A step-by-step guide to extracting, inlining, and automating critical CSS for WordPress block themes — eliminating render-blocking stylesheets and cutting First…
How to Optimize Web Fonts in Block Themes Using the theme.json Font Face API
A complete guide to local font hosting in WordPress block themes: configuring the theme.json Font Face API, subsetting WOFF2 files with pyftsubset, preloading c…
How to Eliminate Layout Shifts in Block Themes for Better Core Web Vitals
Learn how to eliminate CLS in block themes by enforcing explicit image dimensions, preventing font-swap layout shifts with size-adjust fallbacks, stabilizing Qu…
How to Optimize Block Theme Performance with Lazy Loading and Deferred Assets
Learn how to implement native lazy loading for images and iframes in block themes, defer non-critical JavaScript with the WordPress 6.3 strategy API, async-load…
Block Themes vs Classic Themes: Complete Migration Guide for 2026
A complete, step-by-step guide to migrating from classic WordPress themes to block themes in 2026. Covers key differences, theme.json v3, template conversion, b…
How to Migrate Widget Areas to Block Theme Template Parts Without Breaking Functionality
Learn how to map classic WordPress widget areas to block theme template parts — from sidebar-1 to complementary regions, footer columns to wp:columns blocks. In…
How to Build a Hybrid Theme That Supports Both Classic and Block Editing
WordPress has always offered flexibility in how themes render pages. For years, classic PHP templates ruled the ecosystem. Then Full […]…
How to Build Interactive Blocks with the WordPress Interactivity API
Learn how to use the WordPress Interactivity API to build stateful, client-side interactive blocks using real data-wp-* directives, @wordpress/interactivity sto…
How to Add Custom Block Supports in theme.json for Enhanced Editor Controls
Learn how the WordPress block supports system works, how to enable and disable controls per block in theme.json, configure spacing, border, and color supports, …
How to Use Block Filters and Hooks to Modify Block Behavior in Themes
A practical guide for block theme developers on using PHP and JavaScript block filters to modify render output, adjust block metadata, extend blocks with custom…
Twenty Twenty-Seven Is Coming: What Commercial Block Theme Authors Need to Know Now
The WordPress core team has announced the Twenty Twenty-Seven default theme. For commercial block theme authors, a new default theme is never just cosmetic — it…