Changelog

All notable changes to mevy are documented here.

0.4.0 — 2026-06-27

Changed

• Bumped all crate versions to resolve deki_proc version conflict (0.1.x vs 0.3.x)
• mevy_core_syntax 0.2.4 → 0.3.0
• mevy_ecs_syntax 0.2.5 → 0.3.0
• mevy_ui_syntax 0.4.4 → 0.5.0
• mevy_core 0.1.1 → 0.2.0
• mevy_ecs 0.2.5 → 0.3.0
• mevy_ui 0.3.3 → 0.4.0
• mevy 0.3.2 → 0.4.0

Fixed

• Clippy warnings (single_match, collapsible_if, filter_next, match_like_matches_macro, type_complexity, too_many_arguments, get_first, map_flatten, let_and_return, useless_conversion, useless_imports, unwrap_or_default, dead_code)

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.