Changelog

All notable changes to mevy are documented here.

0.3.2 — 2026-06-20

Added

• Comprehensive documentation site with mdBook
• Grid track syntax support in ui!{} (auto_fill, auto_fit, fit_content, minmax)
• 0.18 feature for mevy_ui and mevy_core

Fixed

• Hex color validation for 5-digit hex codes (e.g., #f0a → #ff00aa)

Changed

• mevy_ecs default feature now includes experimental (breaking for users who don’t want experimental macros)

0.3.1

Added

• 0.17 feature support for mevy_ecs
• On<T> observer trigger support for Bevy 0.17
• trigger.event_target() for Bevy 0.17+

Fixed

• scroll_position field path for Bevy 0.17+ (x/y instead of x_offset/y_offset)

0.3.0

Added

• 0.16 feature support for all crates
• 0.16-rc feature support for all crates
• child_builder support in entity!{}
• EntityWorldMut support in entity!{}
• ancestors[] array for nested children
• try conditional insertion in entity!{}
• modify!{} shorthand macro
• cen![], den![], wen![] alternative entity macros
• gere![], edre![], geco![], edco![] experimental helpers

Changed

• border_radius now maps to Node::border_radius in Bevy 0.18+
• BoxShadow field access updated for Bevy 0.16+ (array-based)
• BorderColor structure updated for Bevy 0.17+ (per-edge)
• line_height now uses separate LineHeight component in Bevy 0.18+

[0.2.x]

Added

• Initial entity!{} macro with hierarchy spawning
• Initial ui!{} macro with CSS-like notation
• Initial code!{} macro with hex/Val/UiRect shorthand
• Slim mode for ui!{}

Migration

See Migration Guide for details on migrating between Bevy versions.