4.54.0

2025-12-20

Features

• Enable tree-shaking for Symbol.hasInstance, Symbol.dispose and Symbol.asyncDispose properties if unused (#6046)

Bug Fixes

• Ensure that well-known-Symbol-valued properties are not tree-shaken except in select cases (#6046)
• Ensure namespace properties are included when referenced only from a try-catch (#6216)

Pull Requests

• #6046: fix: correctly handle wellknown protocols (@cyyynthia, @lukastaegert)
• #6201: chore(deps): update dependency lru-cache to v11 (@renovate[bot], @lukastaegert)
• #6211: chore(deps): update msys2/setup-msys2 digest to 4f806de (@renovate[bot], @lukastaegert)
• #6212: chore(deps): update actions/cache action to v5 (@renovate[bot])
• #6213: chore(deps): update github artifact actions (major) (@renovate[bot])
• #6214: fix(deps): lock file maintenance minor/patch updates (@renovate[bot])
• #6215: chore(deps): lock file maintenance (@renovate[bot])
• #6216: fix: include namespace variable paths during try-catch deoptimization (@schwing)

4.53.5

2025-12-16

Bug Fixes

• Fix wrong semicolon insertion position when using JSX (#6206)
• Generate spec-compliant sourcemaps when sources content is excluded (#6196)

Pull Requests

• #6196: fix: set sourcesContent to undefined instead of null when excluding sources content (@TrickyPi)
• #6206: Fix semicolon order in JSX (@TrickyPi)

4.53.4

2025-12-15

Bug Fixes

• Ensure Symbol.dispose and Symbol.asyncDispose properties are never removed with (await) using declarations. (#6209)

Pull Requests

• #6185: chore(deps): update dependency @inquirer/prompts to v8 (@renovate[bot], @lukastaegert)
• #6186: fix(deps): lock file maintenance minor/patch updates (@renovate[bot])
• #6187: chore(deps): lock file maintenance (@renovate[bot])
• #6188: chore(deps): lock file maintenance minor/patch updates (@renovate[bot])
• #6190: Fix syntax error in manualChunks example (@jonnyeom)
• #6194: chore(deps): update actions/checkout action to v6 (@renovate[bot])
• #6195: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6202: fix(deps): update swc monorepo (major) (@renovate[bot])
• #6203: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6209: Do not tree-shake handlers for "using" (@lukastaegert)

4.53.3

2025-11-19

Bug Fixes

• Fix an error where too many modules where flagged for having an unused external import (#6182)
• Fix an error where an assignment was wrongly tree-shaken when mutating it (#6183)

Pull Requests

• #6171: Add test-install CI job to test packaging, installation and importing of rollup package (@antoninkriz, @lukastaegert)
• #6174: Re-enable TypeScript test (@lukastaegert)
• #6180: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6182: Tracing the importers chain for exported variables in external module (@TrickyPi, @lukastaegert)
• #6183: Check if left side is included when checking if assigning to an assignment has side effects (@lukastaegert)

4.53.2

2025-11-10

Bug Fixes

• Do not throw when using invalid escape sequences in template literals (#6177)

Pull Requests

• #6177: handle TemplateElement with null cooked value (@TrickyPi)

4.53.1

2025-11-07

Bug Fixes

• Fix install script (#6172)

Pull Requests

• #6172: fix: move patch-package from postinstall to prepare script (@mshima)

4.53.0

2025-11-07

Features

• Improve rendering performance by caching generated variable names (#5947)

Pull Requests

• #5947: refactor: store safe variable names in cache for subsequent usage (@Aslemammad, @lukastaegert, @service account user)
• #6149: chore(deps): update dependency vite to v7.1.11 [security] (@renovate[bot], @service account user)
• #6151: fix(deps): update swc monorepo (major) (@renovate[bot], @service account user)
• #6152: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @service account user)
• #6153: chore(deps): lock file maintenance minor/patch updates (@renovate[bot], @service account user)
• #6155: Fix tests: Do not swallow warnings for multi-format tests (@lukastaegert, @service account user)
• #6159: chore(deps): update dependency eslint-plugin-unicorn to v62 (@renovate[bot])
• #6160: chore(deps): update github artifact actions (major) (@renovate[bot])
• #6161: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6164: chore(deps): update dependency @rollup/plugin-alias to v6 (@renovate[bot])
• #6165: chore(deps): update dependency @rollup/plugin-commonjs to v29 (@renovate[bot])
• #6166: fix(deps): update swc monorepo (major) (@renovate[bot], @lukastaegert)
• #6167: chore(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)

4.52.5

2025-10-18

Bug Fixes

• Always produce valid UUIDs as debugIds in sourcemaps (#6144)

Pull Requests

• #6135: chore(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6140: chore(deps): update peter-evans/create-or-update-comment action to v5 (@renovate[bot])
• #6141: chore(deps): update peter-evans/find-comment action to v4 (@renovate[bot])
• #6142: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6143: chore: eslint enable concurrency option (@btea)
• #6144: fix: generation of debugIDs with invalid length (@pablomatiasgomez, @lukastaegert)
• #6146: chore(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)
• #6147: chore(deps): update actions/setup-node action to v6 (@renovate[bot])

4.52.4

2025-10-03

Bug Fixes

• Fix an issue where the wrong branch of nullish coalescing was picked (#6133)

Pull Requests

• #6128: Enable npm OIDC publishing (@lukastaegert)
• #6133: Correct nullish coalescing branch resolution for symbol left value (@TrickyPi)
• #6134: fix(deps): lock file maintenance minor/patch updates (@renovate[bot], @lukastaegert)

4.52.3

2025-09-27

Bug Fixes

• Fix check in native loader for environments that do not support reports (#6123)

Pull Requests

• #6123: fix(native-loader): safely handle report.getReport() on Termux/Android (@Jobians, @lukastaegert)
• #6124: chore(deps): pin msys2/setup-msys2 action to fb197b7 (@renovate[bot])
• #6125: fix(deps): lock file maintenance minor/patch updates (@renovate[bot])
• #6126: chore(deps): lock file maintenance minor/patch updates (@renovate[bot])