0.19.0 (Jun 14, 2026)

• New @stylexjs/atoms package for inline atomic styles.
• ESLint 10 compatibility.
• Add gap auto-fix for legacy-expand-shorthands and skip single-value gap and flex in valid-shorthands.
• Extend textWrap validation with pretty and stable values.
• Fix sx prop runtime stylex import injection.
• Fix pseudo-element + pseudo-class selector ordering.
• Fix aliased theme file resolution to absolute paths.
• Fix sort-keys autofix ordering.
• Fix media type parenthesization in and chains in the style value parser.

0.18.3 (Apr 29, 2026)

• Experimental nested APIs for defineVars, defineConsts, and createTheme.
• Add recursive derivation support for defineVars.
• ESLint auto-fixers for shorthand expansion, gated by styleResolution config.
• Respect project browserslist config instead of hardcoding >= 1%.
• Add :empty pseudo-class and unclosed string detection to the compiler.
• StyleX DevTools extension now available in the Chrome Web Store.

0.18.2 (Mar 23, 2026)

• Bring back stylex.attrs for SSR and non-React frameworks.
• Add layersBefore, layersAfter, and layersPrefix for @layer control.
• Add flex, grid, and animation shorthand expansion to ESLint plugin.
• ESLint fixes: bare number support, false positive fixes in stylex.create.

0.18.1 (Mar 5, 2026)

• Add simple sx={} JSX prop syntax as an alternative to stylex.props.
• Fix unplugin generateBundle hook to use emitFile instead of direct bundle assignment.

0.18.0 (Mar 3, 2026)

• Add stylex.env API for compile-time constants and shareable design tokens.
• New @stylexjs/create CLI for scaffolding projects with npm create @stylexjs.
• Add Bun support and improvements to the unplugin bundler plugin.
• Support attribute selectors in stylex.when and conditional styles.
• Fix priority calculation for compound pseudo selectors.

0.17.5 (Jan 12. 2026)

• New no-conflicting-props lint rule.
• Add disallowedPropertiesValidation config to disable property compiler errors by default.
• Preserve units in zero values for CSS variables.
• Fix unplugin cache invalidation on style changes.
• Add env compiler option to expose stylex.env compile-time constants.

0.17.4 (Dec 18. 2025)

• New playground within the docs website.
• Fix named exports detection on Turbopack.

0.17.3 (Dec 12, 2025)

• Add docs for setup instructions.
• Improve AST detection for .stylex named exports
• Add browser rollup bundle.
• Fix unplugin file suffix parsing.

0.17.2 (Dec 1, 2025)

• Pass importSources to babel plugin in unplugin plugin.
• Fix custom typescript typedef mistake.

0.17.1 (Nov 26, 2025)

• Add support for compiling stylex from imported packages.
• Add runtime injection support for defineConsts constants.
• Show full debug file paths.
• Fix media query ordering for queries with 'screen and'.
• Add debugFilePath config option.
• Fix unitless zoom bug for float values.
• Fix props compilation for array mutations.

0.17.0 (Nov 18, 2025)

• Add docs for ESLint rules and stylex.when API.
• Add defineMarker() for custom markers for selector combinators.
• New unplugin bundler plugin implementation for various bundlers (Vite, Webpack, Rspack, Rollup, etc.).
• Enhance stylex.props to precompile more often for better performance.
• Order pseudo-classes and stylex.when selectors according to priorities in `sort-keys.
• Add support for ternary and logical expressions in valid-styles.
• Bump specificity of stylex.when selectors over defaults.
• Add polyfill for logical float values in legacy mode.

0.16.3 (Oct 27, 2025)

• Add configs to sort-keys property ordering.
• Create new defineConsts specific file extension.
• Add defineConsts and various file extension support to enforce-extension.
• Add config for custom module resolution.
• Turn enableMediaQueryOrder on by default.
• Updates to docs and Flow.

0.16.2 (Oct 13, 2025)

• Handle descendant selector styles in valid-styles rule.
• Adjust descendant selector .when priorities.
• Fix defineVars and createTheme at-rules priorities.
• Update defineConsts types for non-stylex usage.

0.16.1 (Oct 2, 2025)

• New no-lookahead-selector lint rule to flag certain descendant and sibling selectors.
• Fix priorities for descendant and sibling selectors.
• Fix color functions for valid-shorthands rule.
• Fix hoisting issues with duplicate keys in create calls.
• Add storybook example.

0.16.0 (Sep 25, 2025)

• Added support for descendant and shared selectors.
• Support CSS variable overrides with defineConsts.
• Add valid-styles support to CSS variable overrides in create calls.
• Replace valid-styles object check with Flow typing

0.15.4 (Sep 7, 2025)

• Add configuration modes to processStylexRules.
• Support local resolved constants, positionTry, and '0' values in valid-styles ESLint rule.
• Implement defineConsts for dynamic styles.
• Create .transformed file extension for preresolved variables.

0.15.3 (Aug 13, 2025)

• Optimize precomputed props calls in JSX.
• Fix class name construction for dynamic contextual styles.
• Handle all unit values in media query rewriting.

0.15.2 (Aug 1, 2025)

• Exclude private dependencies from @stylexjs/babel-plugin package.
• Reduce chances of dynamic variable name collisions.

0.15.1 (Aug 1, 2025)

Fixes

• Hoist stylex.create and static className objects to the top level for support inside functions.

0.15.0 (Jul 31, 2025)

New features

• Enable media query ordering and parsing behind enableMediaQueryOrder flag.
• Integrate media query parser for automatic media query validation and normalization.

Fixes

• Implement merging of width, height, and ranges in media query transformer.
• Optimize dynamic styles output for conditionals and template literals.
• Fix TypeScript types for stylex.types.* functions.
• Fix opaque type issues for InlineStyles.

0.14.3 (Jul 22, 2025)

Fixes

• Do not emit class names for null or undefined dynamic styles.
• Optimize dynamic styles output for binary and unary expressions.

0.14.2 (Jul 14, 2025)

Fixes

• ESLint plugin style validation for length properties (#1136)
• Remove legacy RTL flipping of boxShadow, cursor, textShadow values.

0.14.1 (Jul 3, 2025)

Fixes

• Another fix for TypeScript types.

0.14.0 (Jun 30, 2025)

New features

• Add viewTransitionClass API for creating CSS View Transitions.
• ESLint plugin includes validImports options for all rules.
• ESLint plugin includes autofix for all remaining nonstandard CSS properties when using the valid-styles rule.

Breaking changes

• Make property-specificity the default styleResolution.

Fixes

• Fix theming in dev/debug mode.
• Avoid putting certain @-rules in @layer blocks.
• Fix type exports for TypeScript.

0.13.1 (May 21, 2025)

Fixes

• Export additional Types.

0.13.0 (May 19, 2025)

New features

• Add positionTry API for creating @property-try declarations.
• Add defineConsts API for inlining constant values.
• Re-write of the runtime style injection module to be more reliable.

Breaking changes

• The runtimeInjection compiler option is now disabled by default when dev is true.
• The ESLint rule no-legacy-conditional-styles is renamed to no-legacy-contextual-styles.
• The useRemForFontSize compiler option is renamed to enableFontSizePxToRem. It is disabled by default and should not be used directly.
• The genConditionalClasses compiler option is renamed to enableInlinedConditionalMerge. It is enabled by default and should not be used directly.
• The attrs API is removed due to low usage and redundancy with the props API.

Fixes

• Fix the TypeScript types for themes and types functions.
• Fix the creation of duplicate classNames when defining nested pseudo-classes.
• Fix that allows the ESLint plugin to support use of importSources object syntax in validImports.
• Fix incorrect compiler error messages.
• Fix a bug that incorrectly wrapped CSS variables in quotes when used in the content property.
• Fix a bug in the firstThatWorks API when the last value was a variable.
• Allow importSources to be configured in the PostCSS plugin for React Strict DOM compatibility.

Deprecations

• Deprecate @stylexjs/shared package.

0.12.0 (Apr 10, 2025)

New features

• Hash keys in compiled style objects to reduce generated code size.
• New eslint rule to flag use of legacy Media Query and pseudo-class syntax.

Fixes

• Fix pseudo-elements bug in dynamic styles.
• Performance improvements to createTheme compilation by caching object evaluation.
• Disallow spreading in create calls.

Deprecations

• Deprecate @stylexjs/dev-runtime package.
• Deprecate @stylexjs/esbuild-plugin package.
• Deprecate @stylexjs/nextjs-plugin package.
• Deprecate @stylexjs/open-props package.
• Deprecate @stylexjs/webpack-plugin package.

0.11.1 (Mar 3, 2025)

Fixes

• Fix create compilation regression for string and number keys.
• Fix babel path resolution within monorepos.

0.11.0 (Feb 27, 2025)