rollup

3.12.0

2023-01-28

Features

• Change generated external namespace reexport helper code for CommonJS to better work with NodeJS named export detection (#4826)

Pull Requests

• #4825: Add and use anchors for nested options (@lukastaegert)
• #4826: Use old namespace reexport code pattern for better Node support (@lukastaegert)

3.11.0

2023-01-26

Features

• Support opt-in tree-shaking for emitted assets based on code references (#4805)

Bug Fixes

• Adapt documentation references in Rollup to new website (#4807)

Pull Requests

• #4805: feat: add needsCodeReference field to EmittedAsset (@TrickyPi)
• #4807: Rewrite website in Vitepress and merge it into the main repository (@lukastaegert)
• #4816: web-publisher: Update docs/faqs/index.md (@PuruVJ)
• #4819: Replace fs-extra with built-ins (@dnalborczyk)
• #4820: Introduce timeout-minutes in Github actions ci (@dnalborczyk)
• #4822: Tweak document landing page (@sapphi-red)
• #4823: Minor migration guide improvements (@sapphi-red)
• #4824: Add most options to the REPL (@lukastaegert)

3.10.1

2023-01-20

Bug Fixes

• Fix some crashes when using optional chaining with namespaces and improve tree-shaking (#4812)
• Avoid wrongly removed code when using optional chaining (#4812)

Pull Requests

• #4809: fix: rollup bin file is in dist folder (@saibotsivad)
• #4812: Rework tree-shaking support for optional chaining (@lukastaegert)

3.10.0

2023-01-12

Features

• Add information about the resolving plugin to resolved ids (#4789)
• Improve treeshaking for optional chaining when the root is nullish (#4797)

Bug Fixes

• Remove unnecessary internal defaults for acorn options (#4786)

Pull Requests

• #4785: Use @jridgewell/sourcemap-codec (@bluwy)
• #4786: Remove default acorn options + other fixes (@dnalborczyk)
• #4789: feat: add resolvedBy field to ResolvedId (@TrickyPi)
• #4794: fix: import can be shortened (@cunzaizhuyi)
• #4796: Update dependencies (@lukastaegert)
• #4797: feat: treeshake for optional chaining (@antfu)

3.9.1

2023-01-02

Bug Fixes

• Sort keys in generated dynamic namespace objects (#4780)
• Do not consider Array.group to be side effect free as the specs have changed (#4779)

Pull Requests

• #4777: Import from node:fs/promises (@dnalborczyk)
• #4778: Bump deps (@dnalborczyk)
• #4779: Remove array grouping (web compat issue) (@dnalborczyk)
• #4780: Sort namespace object keys (@dnalborczyk)
• #4781: Use Set and builtin-modules package (@dnalborczyk)
• #4782: Use more restrictive types (@dnalborczyk)

3.9.0

2022-12-28

Features

• Support ES2022 arbitrary module namespace identifiers (#4770)
• Add optional version property to plugin type (#4771)

Pull Requests

• #4768: Fix small typo in 999-big-list-of-options.md (@ericmutta)
• #4769: docs: add a instruction about how to run one test on your local computer (@TrickyPi)
• #4770: Add support for arbitrary module namespace identifiers (@lukastaegert)
• #4771: Add version property to Plugin type (@Septh)

3.8.1

2022-12-23

Bug Fixes

• Reduce memory footprint when explicitly passing cache: false (#4762)
• Fix a crash when preserving modules and reexporting namespaces (#4766)

Pull Requests

• #4762: Improve AST garbage collection (@bluwy)
• #4766: Fix handling of namespace reexports when preserving modules (@lukastaegert)

3.8.0

2022-12-22

Features

• Deduplicate ESM exports and reexports when preserving modules (#4759)

Bug Fixes

• Handle files that are emitted as a side effect of the manualChunks option (#4759)

Pull Requests

• #4759: feat: deduplicate reexports and renderedExports to simplify output (@TrickyPi)
• #4761: Support emitting files via manualChunks in output (@lukastaegert)
• #4763: docs: update outdated info (@TrickyPi)

3.7.5

2022-12-17

Bug Fixes

• Avoid name shadowing when default exporting a class that matches the name of another class (#4756)
• Do not display the error message both in a separate line and in the stack trace in rollup CLI (#4749)
• Make type of RollupWarning.cause compatible with Error.cause (#4757)
• Do not swallow side effects when interacting with modules namespaces nested in another object (#4758)

Pull Requests

• #4749: feat: simplify stack info in cli error (@TrickyPi)
• #4756: Avoid name conflicts for default exported classes (@lukastaegert)
• #4757: fix: RollupLog cause allow unknown (@Shinigami92)
• #4758: Correctly handle side effects when a namespace is nested in an object (@lukastaegert)

3.7.4

2022-12-13

Bug Fixes

• Do not remove calls to .exec and .test for included stateful regular expressions (#4742)

Pull Requests

• #4742: fix: check whether RegExp have the global or sticky flags set (@TrickyPi)

3.7.3

2022-12-11

Bug Fixes

• Ensure this.getFileName no longer returns a placeholder as soon as hash placeholders have been resolved (#4747)

Pull Requests

• #4747: provide hashed file name when using this.getFileName in generateBundle (@lukastaegert)

3.7.2

2022-12-10

Bug Fixes

• Improve chunk generation performance when one module is dynamically imported by many other modules (#4736)

Pull Requests

• #4736: Improve chunk assignment performance (@lukastaegert)

3.7.1

2022-12-09

Bug Fixes

• Ad a hint to use @rollup/plugin-json when imports from a JSON file are not found (#4741)

Pull Requests

• #4741: fix: provide json hint when importing a no export json file (@TrickyPi)

3.7.0

2022-12-08

Features

• Do not treat .test and .exec on regular expressions as side effects (#4737)

Pull Requests

• #4737: feat: add sutiable RegExp prototype methods (@TrickyPi)

3.6.0

2022-12-05

Features

• extend this.getModuleInfo with information about exports (#4731)

Pull Requests

• #4731: feat: add exports and exportedBindings to Module class (@TrickyPi)

3.5.1

2022-12-01

Bug Fixes

• Accept functions returning a config in defineConfig (#4728)

Pull Requests

• #4728: Overload defineConfig to accept a RollupOptionsFunction parameter (@Septh)

3.5.0

2022-11-27

Features

• Add treeshake.manualPureFunctions to override static analysis for explicit function names (#4718)

Bug Fixes

• Do not throw when a plugin uses this.load without awaiting its result (#4725)

Pull Requests

• #4718: Add simple way to manually declare pure functions (@lukastaegert)
• #4725: Fix isIncluded error when using rollup-plugin-typescript2 (@lukastaegert)

3.4.0

2022-11-22

Features

• Do not keep unused Object.freeze calls on object literals (#4720)

Pull Requests

• #4720: Only consider Object.freeze a side effect if the argument is used (@lukastaegert)

3.3.0

2022-11-12

Features

• Add "experimentalMinChunkSize" option to merge smaller chunks into larger ones (#4705)
• Automatically deduplicate assets again when the source is a Buffer (#4712)
• Deduplicate Buffer with string assets (#4712)

Bug Fixes

• Support plugins with object hooks when using perf: true (#4707)

Pull Requests

• #4702: docs: add additional tips for heap out of memory (@benmccann)
• #4705: Allow to define minimum chunk size limit (@lukastaegert)
• #4707: Fix perf timers for object hooks (@lukastaegert)
• #4710: Update terser docs (@nikolas)
• #4712: feat: deduplicate assets with buffer source (@patak-dev)

3.2.5

2022-11-01

Bug Fixes

• We deconflicting classes, ensure the original class name still does not shadow variables (#4697)

Pull Requests

• #4697: Prevent class ids from shadowing other variables (@lukastaegert)

3.2.4

2022-10-31

Bug Fixes

• Always use forward slashes in chunk ids when preserving modules, even on Windows (#4693)
• Escape problematic characters in ids when rewriting import.meta.url (#4693)

Pull Requests

• #4685: update package-lock version (@jerry-lllman)
• #4689: Update 07-tools.md (@cokert)
• #4693: Use correct import.meta.url slashes on Windows (@lukastaegert)

3.2.3

2022-10-18

Bug Fixes

• Fix an issue whre Rollup confused new.target with import.meta (#4679)
• Ensure that Rollup does not make assumptions about the value of unknown namespace import members (#4684)

Pull Requests

• #4679: Do not rewrite new.target (@lukastaegert)
• #4683: Remove typo in resolveId documentation (@ChrispyChris)
• #4684: Return correct values for unknown namespace members (@lukastaegert)

3.2.2

2022-10-16

Bug Fixes

• Do not hang/crash on hashbang comments in input modules (#4676)

Pull Requests

• #4675: refactor: improve & simplify types (@sxzz)
• #4676: Ignore hashhbang comments (@lukastaegert)

3.2.1

2022-10-16

Bug Fixes

• Rewrite class declarations to preserve their .name property if necessary (#4674)

Pull Requests

• #4674: Preserve rendered class names (@lukastaegert)

3.2.0

2022-10-15

Features

• Support providing Promises as plugins like Vite (#4671)

Pull Requests

• #4666: Add unicorn plugin (@lukastaegert)
• #4667: refactor: improve types (@sxzz)
• #4668: fix: nested plugin in options stage (@sxzz)
• #4669: refactor: merge duplicate imports (@c0dedance)
• #4670: docs: fix minor typo in migration documentation (@ThisIsMissEm)
• #4671: feat: support async plugins (@sxzz)

3.1.0

2022-10-12

Features

• Support using arrays of plugins as plugins like Vite (#4657)

Pull Requests

• #4657: feat: support nested plugin (@sxzz)

3.0.1

2022-10-12

Bug Fixes

• Fix installation on Windows (#4662)
• Avoid missing parameters that are only used in a destructuring initializer (#4663)

Pull Requests

• #4661: Enforce type imports (@lukastaegert)
• #4662: fix: missing "node" causes run script error (@c0dedance)
• #4663: Ensure the initializer of a destructuring declaration is always included if the id is included (@lukastaegert)
• #4664: fix: remove lint:js:nofix script redundancy options (@c0dedance)

3.0.0

2022-10-11

Breaking Changes General Changes

• Rollup now requires at least Node 14.18.0 to run (#4548 and #4596)
• The browser build has been split into a separate package @rollup/browser (#4593)
• The node build uses the node: prefix for imports of builtin modules (#4596)
• Some previously deprecated features have been removed (#4552):
  • Some plugin context functions have been removed:
    • this.emitAsset(): use this.emitFile()
    • this.emitChunk(): use this.emitFile()
    • this.getAssetFileName(): use this.getFileName()
    • this.getChunkFileName(): use this.getFileName()
    • this.isExternal(): use this.resolve()
    • this.resolveId(): use this.resolve()
  • The resolveAssetUrl plugin hook has been removed: use resolveFileUrl
  • Rollup no longer passes assetReferenceId or chunkReferenceId parameters to resolveFileUrl
  • The treeshake.pureExternalModules option has been removed: use treeshake.moduleSideEffects: 'no-external'
  • You may no longer use true or false for output.interop. As a replacement for true, you can use "compat"
  • Emitted assets no longer have an isAsset flag in the bundle
  • Rollup will no longer fix assets added directly to the bundle by adding the type: "asset" field
• Some features that were previously marked for deprecation now show warnings when used (#4552):
  • Some options have been deprecated:
    • inlineDynamicImports as part of the input options: use output. inlineDynamicImports
    • manualChunks as part of the input options: use output. manualChunks
    • maxParallelFileReads: use `maxParallelFileOps
    • output.preferConst: use output.generatedCode.constBindings
    • output.dynamicImportFunction: use the renderDynamicImport plugin hook
    • output.namespaceToStringTag: use output.generatedCode.symbols
    • preserveModules as part of the input options: use output. preserveModules
  • You should no longer access this.moduleIds in plugins: use this.getModuleIds()
  • You should no longer access this.getModuleInfo(...).hasModuleSideEffects in plugins: use this.getModuleInfo(...).moduleSideEffects
• Configuration files are only bundled if either the --configPlugin or the --bundleConfigAsCjs options are used. The configuration is bundled to an ES module unless the --bundleConfigAsCjs option is used. In all other cases, configuration is now loaded using Node's native mechanisms (#4574 and #4621)
• The properties attached to some errors have been changed so that there are fewer different possible properties with consistent types (#4579)
• Some errors have been replaced by others (ILLEGAL_NAMESPACE_REASSIGNMENT -> ILLEGAL_REASSIGNMENT, NON_EXISTENT_EXPORT -> MISSING_EXPORT) (#4579)
• Files in rollup/dist/* can only be required using their file extension (#4581)
• The loadConfigFile helper now has a named export of the same name instead of a default export (#4581)
• When using the API and sourcemaps, sourcemap comments are contained in the emitted files and sourcemaps are emitted as regular assets (#4605)
• Watch mode no longer uses Node's EventEmitter but a custom implementation that awaits Promises returned from event handlers (#4609)
• Assets may only be deduplicated with previously emitted assets if their source is a string (#4644)
• By default, Rollup will keep external dynamic imports as import(…) in commonjs output unless output.dynamicImportInCjs is set to false (#4647)

Changes to Rollup Options

• As functions passed to output.banner/footer/intro/outro are now called per-chunk, they should be careful to avoid performance-heavy operations (#4543)
• entryFileNames/chunkFileNames functions now longer have access to the rendered module information via modules, only to a list of included moduleIds (#4543)
• The path of a module is no longer prepended to the corresponding chunk when preserving modules (#4565)
• When preserving modules, the [name] placeholder (as well as the chunkInfo.name property when using a function) now includes the relative path of the chunk as well as optionally the file extension if the extension is not one of .js, .jsx, .mjs, .cjs, .ts, .tsx, .mts, or .cts (#4565)
• The [ext], [extName] and [assetExtName] placeholders are no longer supported when preserving modules (#4565)
• The perf option no longer collects timings for the asynchronous part of plugin hooks as the readings were wildly inaccurate and very misleading, and timings are adapted to the new hashing algorithm (#4566)
• Change the default value of makeAbsoluteExternalsRelative to "ifRelativeSource" so that absolute external imports will no longer become relative imports in the output, while relative external imports will still be renormalized (#4567)
• Change the default for output.generatedCode.reservedNamesAsProps to no longer quote properties like default by default (#4568)
• Change the default for preserveEntrySignatures to "exports-only" so that by default, empty facades for entry chunks are no longer created (#4576)
• Change the default for output.interop to "default" to better align with NodeJS interop (#4611)
• Change the default for output.esModule to "if-default-prop", which only adds __esModule when the default export would be a property (#4611)
• Change the default for output.systemNullSetters to true, which requires at least SystemJS 6.3.3 (#4649)

Plugin API Changes

• Plugins that add/change/remove imports or exports in renderChunk should make sure to update ChunkInfo.imports/importedBindings/exports accordingly (#4543)
• The order of plugin hooks when generating output has changed (#4543)
• Chunk information passed to renderChunk now contains names with hash placeholders instead of final names, which will be replaced when used in the returned code or ChunkInfo.imports/importedBindings/exports (#4543 and #4631)
• Hooks defined in output plugins will now run after hooks defined in input plugins (used to be the other way around) (#3846)

Features

• Functions passed to output.banner/footer/intro/outro are now called per-chunk with some chunk information (#4543)
• Plugins can access the entire chunk graph via an additional parameter in renderChunk (#4543)
• Chunk hashes only depend on the actual content of the chunk and are otherwise stable against things like renamed/moved source files or changed module resolution order (#4543)
• The length of generated file hashes can be customized both globally and per-chunk (#4543)
• When preserving modules, the regular entryFileNames logic is used and the path is included in the [name] property. This finally gives full control over file names when preserving modules (#4565)
• output.entryFileNames now also supports the [hash] placeholder when preserving modules (#4565)
• The perf option will now collect (synchronous) timings for all plugin hooks, not just a small selection (#4566)
• All errors thrown by Rollup have name: RollupError now to make clearer that those are custom error types (#4579)
• Error properties that reference modules (such as id and ids) will now always contain the full ids. Only the error message will use shortened ids (#4579)
• Errors that are thrown in response to other errors (e.g. parse errors thrown by acorn) will now use the standardized cause property to reference the original error (#4579)
• If sourcemaps are enabled, files will contain the appropriate sourcemap comment in generateBundle and sourcemap files are available as regular assets (#4605)
• Returning a Promise from an event handler attached to a RollupWatcher instance will make Rollup wait for the Promise to resolve (#4609)
• There is a new value "compat" for output.interop that is similar to "auto" but uses duck-typing to determine if there is a default export (#4611)
• There is a new value "if-default-prop" for esModule that only adds an __esModule marker to the bundle if there is a default export that is rendered as a property (#4611)
• Rollup can statically resolve checks for foo[Symbol.toStringTag] to "Module" if foo is a namespace (#4611)
• There is a new CLI option --bundleConfigAsCjs which will force the configuration to be bundled to CommonJS (#4621)
• Import assertions for external imports that are present in the input files will be retained in ESM output (#4646)
• Rollup will warn when a module is imported with conflicting import assertions (#4646)
• Plugins can add, remove or change import assertions when resolving ids (#4646)
• The output.externalImportAssertions option allows to turn off emission of import assertions (#4646)
• Use output.dynamicImportInCjs to control if dynamic imports are emitted as import(…) or wrapped require(…) when generating commonjs output (#4647)

Bug Fixes

• Chunk hashes take changes in renderChunk, e.g. minification, into account (#4543)
• Hashes of referenced assets are properly reflected in the chunk hash (#4543)
• No longer warn about implicitly using default export mode to not tempt users to switch to named export mode and break Node compatibility (#4624)
• Avoid performance issues when emitting thousands of assets (#4644)

Pull Requests

• #3846: [v3.0] Run output plugins last (@aleclarson)
• #4543: [v3.0] New hashing algorithm that "fixes (nearly) everything" (@lukastaegert)
• #4548: [v3.0] Deprecate Node 12 (@lukastaegert)
• #4552: [v3.0] Remove actively deprecated features, show warnings for other deprecated features (@lukastaegert)
• #4558: [v3.0] Convert build scripts to ESM, update dependencies (@lukastaegert)
• #4565: [v3.0] Rework file name patterns when preserving modules (@lukastaegert)
• #4566: [v3.0] Restructure timings (@lukastaegert)
• #4567: [v3.0] Change default for makeAbsoluteExternalsRelative (@lukastaegert)
• #4568: [v3.0] Change default for output.generatedCode.reservedNamesAsProps (@lukastaegert)
• #4574: [v3.0] Better esm config file support (@lukastaegert)
• #4575: [v3.0] Show deprecation warning for maxParallelFileReads (@lukastaegert)
• #4576: [v3.0] Change default for preserveEntrySignatures to exports-only (@lukastaegert)
• #4579: [v3.0] Refine errors and warnings (@lukastaegert)
• #4581: [v3.0] Use named export for loadConfigFile (@lukastaegert)
• #4592: [v3.0] Port doc changes from #4572 and #4583 to 3.0 (@berniegp)
• #4593: [v3.0] Browser build (@lukastaegert)
• #4596: [v3.0] Use "node:" prefix for imports of node builtins (@lukastaegert)
• #4605: [v3.0] Better sourcemap emission (@lukastaegert)
• #4609: [v3.0] Custom awaiting watch emitter (@lukastaegert)
• #4611: [v3.0] Improve interop defaults (@lukastaegert)
• #4621: [v3.0] Always try to load config files via Node if possible (@lukastaegert)
• #4624: [v3.0] Remove warning when using implicit default export mode (@lukastaegert)
• #4631: [v3.0] Use ASCII characters for hash placeholders (@lukastaegert)
• #4644: [v3.0] Improve performance of asset emissions (@lukastaegert)
• #4646: [v3.0] Basic support for import assertions (@lukastaegert)
• #4647: [v3.0] Keep dynamic imports in CommonJS output (@lukastaegert)
• #4649: [v3.0] Change default for systemNullSetters (@lukastaegert)
• #4651: [v3.0] use compiler target ES2020 (@dnalborczyk)

2022-09-22

Bug Fixes

• Avoid massive performance degradation when creating thousands of chunks (#4643)

Pull Requests

• #4639: fix: typo docs and contributors link in CONTRIBUTING.md (@takurinton)
• #4641: Update type definition of resolveId (@ivanjonas)
• #4643: Improve performance of chunk naming collision check (@lukastaegert)

2022-08-31

Features

• Add amd.forceJsExtensionForImports to enforce using .js extensions for relative AMD imports (#4607)

Pull Requests

• #4607: add option to keep extensions for amd (@wh1tevs)

2022-08-19

Bug Fixes

• Avoid inferring "arguments" as name for a default export placeholder variable (#4613)

Pull Requests

• #4613: Prevent using arguments for generated variable names (@lukastaegert)

2022-08-14

Features

• Support writing plugin hooks as objects with a "handler" property (#4600)
• Allow changing execution order per plugin hook (#4600)
• Add flag to execute plugins in async parallel hooks sequentially (#4600)

Pull Requests

• #4600: Allow using objects as hooks to change execution order (@lukastaegert)

2022-08-11

Bug Fixes

• Correctly resolve preserveModulesRoot in Vite (#4591)

Pull Requests

• #4591: resolve currentPath (@cleverpp)

2022-07-27

Bug Fixes

• Avoid a rendering failure when mixing outputs with inlined and non-inlined dynamic imports (#4589)

Pull Requests

• #4589: Handle generating non-inlined imports after inlined ones (@lukastaegert)

2.77.1

2022-07-26

Bug Fixes

• Ensure IIFE output generates a global variable when generating ES5 (#4588)

Pull Requests

• #4577: broken link removed (@Jawad-H)
• #4580: Update dependencies (@lukastaegert)
• #4584: Documentation clarity and syntax improvements (@berniegp)
• #4588: Use var for IIFE (@lukastaegert)

2022-07-15

Features

• Introduce maxParallelFileOps to limit both read and write operations, default to 20 and replaces maxParallelFileRead (#4570)

Bug Fixes

• Avoid including variables referenced from return statements that are never reached (#4573)

Pull Requests

• #4570: Introduce maxParallelFileOps to limit parallel writes (@lukastaegert)
• #4572: Document more ways to read package.json in ESM (@berniegp)
• #4573: Do not include unused return expressions (@lukastaegert)

2022-07-08

Features

• Allow setting a sourcmapBaseUrl for absolute paths in sourcemaps (#4527)

Bug Fixes

• Support absolute CLI plugin paths on Windows (#4533)

Pull Requests

• #4527: Add sourcemapBaseUrl option (@nickgarlis)
• #4533: Add support for absolute plugin paths (@ygoe)
• #4538: chore: Included githubactions in the dependabot config (@naveensrinivasan)
• #4546: Adapt Node versions on CI to prepare for v3 (@lukastaegert)
• #4556: Improve error message for invalid patterns (@DysphoricUnicorn)
• #4559: Update dependencies (@lukastaegert)
• #4560: Bump peter-evans/create-or-update-comment from 1 to 2 (@dependabot)
• #4561: Bump peter-evans/find-comment from 1 to 2 (@dependabot)
• #4562: Bump codecov/codecov-action from 1 to 3 (@dependabot)

2022-06-20

Bug Fixes

• Mark Array.prototype.group/groupToMap as side effect free. (#4531)

Pull Requests

• #4523: chore: remove source map workaround, bump deps (@dnalborczyk)
• #4525: Add regression tests for instanceof (@lukastaegert)
• #4528: chore: Set permissions for GitHub actions (@naveensrinivasan)
• #4531: fix: rename Array.prototype.group/groupToMap (@dnalborczyk)
• #4535: chore: bump resolve from 1.22.0 to 1.22.1 (@pos777)

2022-06-07

Bug Fixes

• Properly deoptimize "this" when using member expressions with getters/setters in for loops and update expressions (#4522)

Pull Requests

• #4522: Refactor side effect handling for property interactions (@lukastaegert)

2022-06-01

Bug Fixes

• Avoid crashes when using logical expressions for unused constructor arguments (#4519)
• Fix missing parameter defaults for calls from try statements and functions returned by functions (#4520)

Pull Requests

• #4519: Try to make logical expression deoptimization more robust (@lukastaegert)
• #4520: Roll back parameter default tree shaking (@lukastaegert)

2022-05-31

Bug Fixes

• Ensure parameter defaults are retained when a function is used as an object property (#4516)

Pull Requests

• #4516: Deoptimize parameter defaults when referenced from object/array/class literals (@lukastaegert)

2022-05-29

Bug Fixes

• Retain parameter defaults for functions that are defaults themselves (#4515)
• Track mutations for objects as default values (#4515)

Pull Requests

• #4515: Ensure parameter defaults are deoptimized (@lukastaegert)

2022-05-28

Pull Requests

• #4513: Update link to node polyfill repo (@lukastaegert)

2022-05-27

Features

• Re-implement default parameter tree-shaking for top-level functions (#4510)
• Do not consider calling string methods like .trim() on template literals a side effect (#4511)

Pull Requests

• #4510: Tree-shake parameter defaults (replaces #4498) (@lukastaegert)
• #4511: Tree-shake side-effect-free string methods on template literals (@lukastaegert)

2022-05-19

Bug Fixes

• Revert #4498 until some issues are understood and resolved

2022-05-19

Features

• Remove unneeded default values for function parameters (#4498)

Bug Fixes

• Use a consistent mechanism to resolve the config file to avoid issues on Windows (#4501)
• Avoid an inaccurate warning about an event emitter leak for complicated builds (#4502)
• Ensure that reexporting values from other chunks via dynamic imports does not reference non-imported variables (#4499)

Pull Requests

• #4498: Tree shake parameter defaults (@lukastaegert)
• #4499: Ensure reexports are available for namespaces (@lukastaegert)
• #4501: fix: config path problem on windows (@pos777)
• #4502: Avoid maximum listeners exceeded warning (@lukastaegert)

2022-05-13

Features

• Do not treat Object.defineProperty/ies as side effect when called on an unused object (#4493)
• Do not assume that assigning a property can create a getter with side effects (#4493)
• Do not treat string.prototype.replace(All) as side effect when used with two literals (#4493)

Bug Fixes

• Detect side effects when manually declaring getters on functions (#4493)

Pull Requests

• #4493: Handle getters on functions and improve property deoptimization (@lukastaegert)
• #4494: Do not treat string.replace as side effect when used with a literal (@lukastaegert)
• #4495: Update docs for --configPlugin using typescript (@Jimmydalecleveland)

2022-05-07

Bug Fixes

• Improve tree-shaking of classes with super classes in certain scenarios (#4489)

Pull Requests

• #4489: Do not deoptimize entire super class when adding a property (@lukastaegert)

2022-05-05

Features

• Add CLI hooks to run external commands at certain points in watch mode (#4457)

Bug Fixes

• Fix an issue that could accidentally treat relevant assignments as side effect free (#4486)

Pull Requests

• #4457: feat: CLI event hook flags (@Harris-Miller)
• #4486: Fix reassignment tracking (@lukastaegert)

2022-04-30

Bug Fixes

• Allow importing loadConfigFile without extension (#4483)

Pull Requests

• #4483: Add exports exception for loadConfigFile (@lukastaegert)

2022-04-30

Features

• Mark Object.hasOwn as pure (#4482)

Bug Fixes

• Prevent infinite recursion and display proper warning for recursive reexports (#4472)
• Fix type issue in TypeScript nightly (#4471)

Pull Requests

• #4467: docs: update deprecated option in tools.md (@kimjh96)
• #4471: Fix: tsc did not build (@frank-dspeed)
• #4472: Throw proper error when indirectly reexporting a recursive binding (@lukastaegert)
• #4475: chore: bump deps (#4475) (@dnalborczyk)
• #4477: chore: bump github actions (@dnalborczyk)
• #4478: ci: test with node.js v18, remove v17 (@dnalborczyk)
• #4479: chore(repo): replace git.io in the issue template (@SukkaW)
• #4482: feat: add Object.hasOwn as pure function (@dnalborczyk)

2022-04-15

Bug Fixes

• Do not enforce undefined return values in TypeScript types (#4463)

Pull Requests

• #4463: use void for options hook instead of undefined (@ycmjason)

2022-03-14

Bug Fixes

• Handle unfinished hook action errors as regular errors and avoid console logging (#4434)
• Allow access to "dist" folder in a Node 17 compatible way (#4436)

Pull Requests

• #4434: Track unfinished hook actions as regular errors (@lukastaegert)
• #4436: Update package.json (@frank-dspeed)

2022-03-07

Features

• Make the watchChange and closeWatcher hooks asynchronous and make Rollup wait for these hooks before continuing (#4427)

Bug Fixes

• Do not abort watch mode for errors in watchChange but display them properly (#4427)

Pull Requests

• #4427: Do not abort watch mode on errors in watchChange (@lukastaegert)

2022-03-06

Bug Fixes

• Mark Object.entries and Object.fromEntries as pure (#4429)
• Make sure new properties on Array.prototype and Object.prototype are not evaluated as "undefined" (#4428)

Pull Requests

• #4428: Treat unknown prototype props as unknown (@lukastaegert)
• #4429: Treat unknown prototype props as unknown (@869288142)

2022-03-04

Bug Fixes

• Approximate source position instead of ignoring it when using a low-resolution source map in a transform hook (#4334)

Pull Requests

• #4334: fix(sourcemap): fall back to low-resolution line mapping (@aleclarson and @lukastaegert)

2022-03-02

Features

• Introduce new output.generatedCode.symbols to control the usage of Symbols in Rollup-generated code (#4378)
• soft-deprecate output.namespaceToStringTag in favor of output.generatedCode.symbols (#4378)

Bug Fixes

• Properly handle ./ and ../ as external dependencies (#4419)
• Make generated "Module" namespace toStringTag non-enumerable for correct Object.assign/spread behaviour (#4378)
• Add file name to error when top-level-await is used in disallowed formats (#4421)

Pull Requests

• #4378: Make namespace @@toStringTag "Module" non-enumerable (@dnalborczyk and @lukastaegert)
• #4413: refactor: some code and type fixes (@dnalborczyk)
• #4418: chore: bump deps (@dnalborczyk)
• #4419: Properly handle upper directories as external dependencies (@lukastaegert)
• #4421: Improve the error prompt and output the error file name (@caoxiemeihao)
• #4423: Update 999-big-list-of-options.md (@leoj3n)

2022-02-22

Features

• provide information about cached import resolutions in shouldTransformCachedModule (#4414)
• Add "types" field to Rollup's package exports (#4416)

Pull Requests

• #4410: refactor: use map for declarations and name suggestions (@dnalborczyk)
• #4411: refactor: use map for namespace reexports by name (@dnalborczyk)
• #4412: refactor: use includes where appropriate (@dnalborczyk)
• #4414: Add resolved sources to shouldTransformCachedModule (@lukastaegert)
• #4416: Add Typescript 4.5 nodenext node12 module resolution support (@frank-dspeed)

2022-02-18

Bug Fixes

• Do not swallow other errors when unfinished hook actions are detected (#4409)
• Add additional information to output when there are unfinished hook actions (#4409)

Pull Requests

• #4399: docs: remove const (@TrickyPi)
• #4401: Improve test stability by getting independent of module id ordering in more places (@lukastaegert)
• #4403: fix: remove unnecessary property descriptor spread (@dnalborczyk)
• #4404: refactor: use map for import descriptions + re-export descriptions (@dnalborczyk)
• #4405: refactor: module exports to map (@dnalborczyk)
• #4406: Fix a typo in 'Direct plugin communication' code example (@younesmln)
• #4407: Document how resolveId is cached (@lukastaegert)
• #4409: Print ids for unfinished moduleParsed and shouldTransformCachedModule hooks (@lukastaegert)

2022-02-10

Bug Fixes

• Ensure consistent order between manual chunks to fix hashing issues (#4397)

Pull Requests

• #4390: refactor: add @types/estree explicitly, fix dynamic type imports (@dnalborczyk)
• #4391: chore: remove acorn-walk ambient type definitions (@dnalborczyk)
• #4397: Sort manual chunks generated via a function by name (@lukastaegert)

2022-02-07

Bug Fixes

• Make chunk file and variable names more deterministic when emitting chunks (#4386)
• Improve default module resolver performance by using non-blocking IO (#4386)

Pull Requests

• #4373: fix: even more types (@dnalborczyk)
• #4382: Update contribution tut link desc (@lemredd)
• #4383: chore: bump deps (@dnalborczyk)
• #4384: chore: move "wait" to utils + re-use (@dnalborczyk)
• #4385: refactor: convert watch tests to async functions (@dnalborczyk)
• #4386: refactor: use fs.promises in resolve id, Part 4 (@dnalborczyk and @lukastaegert)
• #4389: refactor: use fs.promises in generate license file, rollup config, Part 5 (@dnalborczyk)

2022-02-02

Features

• Improve side effect detection when using Array.prototype.groupBy/groupByToMap (#4360)
• Allow changing moduleSideEffects at any time during the build (#4379)
• Soft-deprecate ModuleInfo.hasModuleSideEffects in favour of ModuleInfo.moduleSideEffects (#4379)

Bug Fixes

• Do not include queries and hashes in generated file names when preserving modules (#4374)

Pull Requests

• #4319: refactor: use fs, fs-extra, remove sander (@dnalborczyk)
• #4360: feat: add Array.prototype.groupBy/groupByToMap (@dnalborczyk)
• #4361: fix: more types (@dnalborczyk)
• #4369: fix: remove acorn-walk patch (@dnalborczyk)
• #4371: refactor: use fs.promises in cli/run (@dnalborczyk)
• #4372: refactor: use fs.promises in module loader (@dnalborczyk)
• #4374: Ignore queries and hashes in file names when preserving modules (@lukastaegert)
• #4375: Fix typo in _config.js (@eltociear)
• #4376: refactor: fs.promises, move mkdir to writeoutputfile, Part 3 (@dnalborczyk)
• #4379: Deprecate hasModuleSideEffects in favor of moduleSideEffects and ensure it is mutable on ModuleInfo (@lukastaegert)

2022-01-25

Bug Fixes

• Only warn for conflicting names in namespace reexports if it actually causes problems (#4363)
• Only allow explicit exports or reexports as synthetic namespaces and hide them from namespace reexports (#4364)

Pull Requests

• #4362: refactor: convert exportsByName object to map (@dnalborczyk)
• #4363: Do not warn unnecessarily for namespace conflicts (@lukastaegert)
• #4364: Do not expose synthetic namespace export in entries and namespaces (@lukastaegert)

2022-01-22

Features

• Note if a module has a default export in ModuleInfo to allow writing better proxy modules (#4356)
• Add option to wait until all imported ids have been resolved when awaiting this.load (#4358)

Pull Requests

• #4356: Add hasDefaultExport to ModuleInfo (@lukastaegert)
• #4358: Add "resolveDependencies" option to "this.load" (@lukastaegert)

2022-01-21

Features

• Add complete import resolution objects to ModuleInfo for use in this.load (#4354)

Bug Fixes

• Use correct context in plugin hooks with perf: true (#4357)

Pull Requests

• #4351: refactor: re-use source mapping url (@dnalborczyk)
• #4352: refactor: replace require-relative with built-in require.resolve (@dnalborczyk)
• #4353: chore: bump deps (@dnalborczyk)
• #4354: Add importedIdResolutions to moduleInfo (@lukastaegert)
• #4355: chore: remove external from config (@dnalborczyk)
• #4357: fix: timed plugin context (@dnalborczyk)

2022-01-14

Features

• Allow inspecting cached modules and forcing them to be transformed again via shouldTransformCachedModule (#4320)
• Do not wait for the config file to be parsed in watch mode if it is updated before that (#4344)

Bug Fixes

• Do not mutate objects returned as meta from the resolveId hook (#4347)

Pull Requests

• #4326: refactor: type fixes (@dnalborczyk)
• #4339: More watch test stabilization (@lukastaegert)
• #4340: refactor: performance timers for node.js and browser (@dnalborczyk)
• #4341: Implement shouldTransformCachedModule hook (@lukastaegert)
• #4344: Directly restart Rollup when config file change is detected in watch mode (@lukastaegert)
• #4347: Create a shallow copy when returning meta from resolveId (@lukastaegert)

2022-01-04

Features

• Report a helpful error if rollup exits due to an empty event loop when using this.load (#4320)
• Allow directly mutating ModuleInfo.meta for modules and never replace this object (#4328)
• Detect additional side effect free array prototype methods (#4332)

Bug Fixes

• Do not watch if CLI watch options are specified but --watch is missing (#4335)

Pull Requests

• #4320: Detect unfulfilled async hook actions and report error on exit (@kzc)
• #4328: Make initial ModuleInfo.meta mutable and maintain object identity (@lukastaegert)
• #4318: Stabilize watch tests (@lukastaegert)
• #4331: Improve JS docs example (@lukastaegert)
• #4332: add support for Array.prototype.findLast,findLastIndex (@dnalborczyk)
• #4333: convert utils.transform to async function (@dnalborczyk)
• #4335: Do not watch unless --watch is specified explicitly (@lukastaegert)
• #4338: Add build delay for plugin event test (@lukastaegert)

2021-12-24

Features

• Mark additional string prototype methods as side-effect-free and correct typings of existing ones (#4299)
• Mark additional array prototype methods as side-effect-free and correct typings of existing ones (#4309)
• Expose if a module is included after tree-shaking in its ModuleInfo (#4305)

Bug Fixes

• Fix how fsevents is included to improve watch mode on MacOS (#4312)

Pull Requests

• #4299: Add additional string prototype methods (@dnalborczyk)
• #4300: Bump deps, fix expected test result for core-js (@dnalborczyk)
• #4302: Replace type assertion with type guard (@dnalborczyk)
• #4304: Re-use reserved names set (@dnalborczyk)
• #4305: Expose isIncluded in module info (@william57m)
• #4306: Fix git line breaks on windows (@dnalborczyk)
• #4307: Add macos to pipeline (@dnalborczyk)
• #4309: Add additional array prototype methods (@dnalborczyk)
• #4311: Add Deno instructions to docs (@jespertheend)
• #4312: fsevents integration (@dnalborczyk)
• #4313: Remove non-existing static functions from known globals (@dnalborczyk)

2021-12-11

Bug Fixes

• Only resolve this.load once the code of the module is available (#4296)

Pull Requests

• #4296: Make sure this.load waits for modules that are already loading (@lukastaegert)
• #4298: use set for reserved words (@dnalborczyk)

2021-12-09

Features

• Support ergonomic brand checks for private fields (#4293)

Bug Fixes

• Improve handling of directory creation on systems with restrictive open files limit (#4288)

Pull Requests

• #4288: modifymkdirpath (@mgrabowski84)
• #4293: bump deps (@dnalborczyk)

2021-11-30

Bug Fixes

• Produce correct output when dynamic import paths contain quotes (#4286)

Pull Requests

• #4286: Escape dynamic import paths (@danielroe)

2021-11-22

Bug Fixes

• Make sure virtual files have proper file extensions when preserving modules (#4270)

Pull Requests

• #4270: Use entryFileNames when generating filenames for virtual modules (@BPScott)

2021-11-11

Features

• Add this.load context function to load, transform and parse modules without adding them to the graph (#4234)
• Sanitize non-url-safe characters in generated chunk names by default (#4262)
• Support ESM plugins via command line (#4265)

Pull Requests

• #4234: Plugin context function for pre-loading modules (@lukastaegert)
• #4262: exclude invalid URL chars (@danielroe)
• #4265: support loading ESM plugins from the CLI via --plugin (@kzc)

2021-11-01

Features

• Support static class initialization blocks (#4249)

Bug Fixes

• Fix an issue with the CommonJS plugin when module.exports has inherited properties (#4256)

Pull Requests

• #4236: typescript bug class field initialization order (@dnalborczyk)
• #4249: Support for class static initialization block (@dnalborczyk and @lukastaegert)
• #4256: Skip inherited properties in synthetic namespaces (@lukastaegert)