v0.18.1

What's Changed

• fix: more deep at-rule prelude parsing by @bartveneman in #275
• fix: parse @media prelude operators (not/only) by @bartveneman in #276
• fix node type mismatch between parser and type defs by @bartveneman in #277

Full Changelog: v0.18.0...v0.18.1

v0.18.0

What's Changed

• fix/breaking: deep parse at-rule preludes by @bartveneman in #274

Changes the returned AST for atrule preludes on complex preludes, so marking as breaking change.

Full Changelog: v0.17.0...v0.18.0

v0.17.0

Breaking

• Support dotted layer names in @layer at-rule prelude parsing by @bartveneman in #268

What's Changed

• perf: optimize parser by chaining nodes as siblings instead of arrays (up to 14% faster) by @bartveneman in #269
• perf: sideEffects: false by @bartveneman in #271
• perf: refactor CSS node types with reusable type builders by @bartveneman in #267
• perf: make comments terser by @bartveneman in #273

Misc

• chore(deps): bump actions/download-artifact from 4 to 8 by @dependabot[bot] in #264
• chore(deps-dev): bump @projectwallace/preset-oxlint from 0.0.10 to 0.0.11 in the projectwallace group by @dependabot[bot] in #265
• chore(deps): bump actions/upload-artifact from 4 to 7 by @dependabot[bot] in #263
• chore(deps): bump actions/checkout from 6.0.2 to 7.0.0 by @dependabot[bot] in #261
• chore(deps-dev): bump the npm-all group across 1 directory with 10 updates by @dependabot[bot] in #270
• chore(deps): bump pnpm/action-setup from 6.0.8 to 6.0.9 by @dependabot[bot] in #262
• chore(pr-diff): show fewer package duplicates messages, always show b… by @bartveneman in #272

Full Changelog: v0.16.2...v0.17.0

v0.16.2

What's Changed

• Fix value property to return undefined for nodes without value concept by @bartveneman in #260

Full Changelog: v0.16.1...v0.16.2

v0.16.1

What's Changed

• Add memory benchmarking and arena trimming to reduce waste by @bartveneman in #254
• Remove Codecov bundle analysis integration by @bartveneman in #255
• Add dependency diff workflow for pull requests by @bartveneman in #257
• docs: add bundle sizes to readme by @bartveneman in #259

Full Changelog: v0.16.0...v0.16.1

v0.16.0

breaking

• breaking: rename parse_selector to parse__selector_list and expose new single parse_selector by @bartveneman in #232

What's Changed

• Optimize lexer performance: eliminate recursion and inline hot paths by @bartveneman in #244
• Refactor lexer state management to use save/restore pattern by @bartveneman in #245
• adjust the benchmarks by @bartveneman in #248
• perf: make walking ~10% faster by @bartveneman in #247

Chores

• chore: convert to pnpm; pin gh actions by @bartveneman in #238
• chore: group all npm updates except wallace packages by @bartveneman in #242
• chore(deps-dev): bump the npm-all group with 9 updates by @dependabot[bot] in #243
• chore(deps): bump pnpm/action-setup from 4.3.0 to 6.0.8 by @dependabot[bot] in #239

Performance Benchmarks

Changes since 0.15.0

Throughput (ops/sec, higher is better)

File	Size	Tokenize before	Tokenize after	Parse before	Parse after	Walk before	Walk after	Parse+Walk before	Parse+Walk after
Large	3 KB	20,497	23,450 (+14%)	15,188	18,032 (+19%)	89,442	98,520 (+10%)	12,875	15,143 (+18%)
Bootstrap	274 KB	261	303 (+16%)	189	228 (+21%)	1,297	1,466 (+13%)	164	197 (+20%)
Tailwind	3,557 KB	21	24 (+14%)	14	17 (+21%)	91	100 (+10%)	12	15 (+25%)

Memory usage (Parse+Walk, lower is better)

File	Size	Before	After
Large	3 KB	0.2 MB	0.2 MB
Bootstrap	274 KB	13.2 MB	13.2 MB
Tailwind	3,557 KB	93.9 MB	94.6 MB

Full Changelog: v0.15.1...v0.15.2

v0.15.1

What's Changed

• feat: allow type-narrowing of nodes based on type_name by @bartveneman in #230
• chore: update use of deprecated toMatchTypeOf by @bartveneman in #231

Full Changelog: v0.15.0...v0.15.1

v0.15.0

What's Changed

• breaking/feat: parse @supports prelude into declarations by @bartveneman in #223
• feat: add vendor-prefix support in mediafeature by @bartveneman in #225
• fix: add namespace getter for type selectors by @bartveneman in #228

other

• chore(deps-dev): bump the vite group across 1 directory with 2 updates by @dependabot[bot] in #215
• chore(deps-dev): bump the oxc group with 2 updates by @dependabot[bot] in #216
• chore(deps-dev): bump tsdown from 0.21.5 to 0.21.10 by @dependabot[bot] in #217
• chore(deps-dev): bump postcss from 8.5.8 to 8.5.13 by @dependabot[bot] in #219
• chore(deps-dev): bump @types/node from 24.12.0 to 24.12.2 by @dependabot[bot] in #218
• chore: bump dependencies by @bartveneman in #224

Full Changelog: v0.14.10...v0.15.0

v0.14.10

What's Changed

• fix: narrow next_sibling type on children to match parent's child union by @bartveneman in #214
• fix: only return name/property/etc for relevant node types by @bartveneman in #221

Full Changelog: v0.14.9...v0.14.10

v0.14.9

What's Changed

• fix: expose PlainCSSNode by @bartveneman in #213

Full Changelog: v0.14.8...v0.14.9