Block Style Modifiers

Block Style Modifiers is a simple WordPress plugin that allows you to add multiple block styles to Gutenberg blocks.

Style Modifiers are additive CSS classes that:

• Can be applied in addition to a Block Style
• Can be selected multiple at the same time
• Support both checkbox (non-exclusive) and radio (exclusive) behavior per category
• Are predefined and documented by themes or plugins
• Preserve class order, allowing advanced CSS control

Category Behavior

Style modifiers are organized into categories with two behaviors:

• Non-exclusive categories (checkbox): Multiple modifiers can be selected simultaneously (default: exclusive: false)
• Exclusive categories (radio): Only one modifier from the category can be selected at a time (exclusive: true)

Structured Category Object

Categories must be defin…