All notable changes to Parcel will be documented in this file.

The format is based on Keep a Changelog and Parcel adheres to Semantic Versioning.

• BUG: postcss module generates wrong hashes Details
• Shake exports with pure property assignments Details
• Clear scope cache before crawling to fix scope hoisting classes Details
• Replace module.require in scope hoisting Details
• Define __esModule interop flag when requiring ES module from CommonJS Details
• Fix assigning to exports from inside a function in scope hoisting Details
• Added new parcel info command Details
• Fix Scope hoisting destructuring Details
• HMR update breaks in webworker Details
• Update dotenv-expand to allow overriding with falsy values Details
• bump chokidar to get a reload fix for linux Details
• Upgrading serialize-to-js from 1.1.1 to 3.0.0 Details
• Fix source map on CoffeeScript assets Details

• Downgrade all internal Babel packages to <7.4.0 because of bugs in that release.

• Fix depth option for detailed report

• Correctly build dependency URLs (for CSS) Details
• Fix bug with original null mappings Details
• Regenerate all bundles and trigger an HMR page reload when a new bundle is created Details
• Unescaped "." in regex for JSAsset Details
• Open the specified host Details

• CSS/SASS/LESS sourcemaps Details
• Add Markdown support Details
• Unhandled HMR updates should cause a page reload Details
• Enables jsx plugin in case jsx syntax is used in js files Details
• Add disabling of autoinstall globally via environment variable Details
• Add support for chrome-extension:// protocol to bundle-url.js Details
• Add support for Firefox's 'moz-extension://' protocol, to bundle-url.js Details
• Generate source map files with long extentions (e.g. .js.map) Details
• upgrade htmlnano dep Details
• Default port to process.env.PORT Details
• Inline process.browser for better code elimination Details
• Detect files added to/removed from directories. Details
• Implement depth option for detailed report Details

• Resolve package.browser in subfolders (with backslashes) Details
• fix chokidar ignored regex Details
• Defer throwing asset errors until after dependencies are handled. Details
• fix(sourcemaps): Handle null mappings properly Details
• Use Buffer.from Details
• addURLDependency: use always relative path Details
• reexporting renaming when scopehoisting Details
• Fix and reenable windows scope-hoisting tests Details
• Fix for typescript asset invalidation Details
• Fix hang up when a lot of parallel operation request the file system Details
• Fix localRequire with package/path requests Details
• Refactor htmlnano tests to test for filesize Details
• pug Deprecated pretty Details
• Fix pug test Details
• Use the test to assert this.child.killed rather than checking time difference Details
• Improve tests: symlink tests, Kotlin tests, and maybe test-util module Details
• Handle empty html files Details
• Fix HTMLAsset dependency tag with empty src value Details
• Allow dotfiles to be served Details
• Fix sourceMappingURL for bundles with multiple entry points Details
• Fix absolute path importing in sass Details
• Fix dependency list parsing in RustAsset for paths on Windows Details
• For scope hoisting, Asset IDs cannot contain or / (base64) Details
• Send CORS headers when a file does not exist Details
• Prevent circular deps from causing a stack overflow in HMR runtime Details
• Fix postcss modules composes imports Details
• fix: set default pragmaFrag option for JSX Details
• Remove unnecessary return await Details
• Fix scopehositing with nested dynamic imports Details
• eslint: enable no-return-await Details
• Throw meaningful error on undefined exports Details
• Add helpful plugin errors Details
• Fix HMR failure with js error on load Details

• Add Kotlin asset support Details
• Add --host option Details
• Add support for HMR with elm-hot Details
• Log dev server access for log level verbose or more Details
• Process array of assets for JSON-LD Details
• Extract workerfarm into separate package Details
• Extract Logger into its own package Details
• Extract watcher into its own package Details
• Merge fs-watcher-child into Parcel's monorepo Details

• Use this.write and super.end for JSPackager Details
• Make dynamic import name relative to the file importing it Details
• update postcss and deps Details
• catch css file not found Details
• Treat webmanifest as an entry module Details
• add debugger flag for non production builds in Elm Details
• refactor: JSON.stringify replacer can not be boolean Details
• Fix debug log files for certain locales Details
• Scope hoisting renaming after babel transforms Details
• Switch from toml to @iarna/toml Details
• Update deasync to 0.1.14 (Node 11 fix) Details
• Skip external imports from processing Details
• Don't lowercase attributes in html files Details
• refactor: remove unnecessary not null check Details
• Don't cache dynamic bundles that had a network error Details
• Treeshake functions properly Details
• Fix autoinstall of cssnano Details
• Fix server when there is a dot in the path Details

• Don't dedupe assets that are depended on in more than one bundle Details

• Add <image> as a valid element type to bundle in <svg> tags Details
• Resolving .postcssrc.json as a PostCSS config Details
• Add loaders when bundling workers Details

• Fix hoist of modules with multiple aliases Details
• Fix hoisting of optional require calls Details
• Fix safari 10 compatibility for terser Details
• Fix HMR for Pug assets Details
• Don't load existing sourcemaps if sourcemaps are disabled Details
• add missing --no-autoinstall flag to build command Details

• Fix error when node.id is undefined instead of null

• Babel 7 support Details
• HTML Bundle loader Details
• Process inline scripts and styles Details
• Added LD JSON asset Details
• Add support for Elm assets Details
• Support optionally bundling node_modules for --target=node Details
• Import existing sourcemaps Details
• Import GraphQL files from other GraphQL files Details
• Automatically strip flow types Details
• SugarSS Support Details
• Minimal verbose/debug mode Details
• User friendly error on failed entrypoint resolving Details
• Support for SharedWorkers Details
• Add Object Spread to default Babel transforms Details
• Update help message for --public-url Details
• Support HTML5 history mode routing Details
• Split cache into multiple folders for faster FS Details
• Support array in package.json's sideEffects property Details
• Added stub for require.cache Details
• Added dotenv-expand to expand env vars Details
• Update Typescript to v3.0.0 Details
• Add --no-content-hash option to build cli Details

• Exit process on Error Details
• Fix non updating asset hashes Details
• Fix Sass url resolving Details
• WorkerFarm Cleanup Details
• Fix infinite loop in resolver when using ~/... imports Details
• Default to Dart-Sass and add backwards compatibility for node-sass Details
• Validate if a PostCSS config is an object Details
• VSCode syntax highlight with PostCSS in Vue Component style tag Details
• Glob support in less imports Details
• Generate unique certificate serial number Details
• Keep name in sourcemaps mappings Details
• Replace slack with spectrum badge Details
• Use esnext with typescript and scope hoisting Details
• Fix sourcemaps failing on refresh/hmr Details
• Support sideEffect: false with CommonJS Details
• Get only existing package main Details
• Load minified built-in if available Details
• Support error strings in workers Details
• Terminate workerfarm when using the API Details
• Fix comment typo Details
• Fix dotenv package error Details
• Don't resolve slash and tilde paths twice Details
• bundle name hash-key generation is not environment independent Details
• Don't modify script nodes with text/html type Details
• Fix various windows bugs & tests Details
• Cross-platform deterministic asset ids Details
• allow empty string in meta Details
• fixed watch not working when NODE_ENV is production Details
• Incorrect casing for Logger require Details
• fix security vuln Details
• Remove wasm-gc from RustAsset Details

• Fix nested async imports from a shared module Details
• Prevent nameclashes with internal variables with tree shaking Details

• Fix ora spinner in CI environments Details

• Use fast-glob Details
• Use user installation of cssnano Details
• Upgrade to cssnano v4 Details
• Logger improvements Details
• Watch PostHTML plugins dependencies Details
• Add support for node 10 Details
• Workerfarm improvements Details
• Use minify prelude only minify option Details
• Deterministic asset ids Details

• JSPackager deduplication now accounts for differences in absolute dependency paths Details
• Fix worker bundle hoisting Details
• Prioritize browser field over module Details
• Fix aliasing of folder relative to project folder Details
• Only watch directories on macOS Details
• Fix generating names when outside of the entry directory Details
• Handle invalidating cache if dependency is a glob Details
• Fix import deep wildcards with tree-shaking Details
• Fix tree-shaking named import on wrapped module Details
• Fix circular deps in isolated bundles (e.g. workers) Details
• Fix tree-shaking wildcards with sideEffects: false Details
• Fix 'buildStart' event is not firing Details

• Upgrade Typescript to 2.9 Details
• Upgrade DEFAULT_ENGINES node to Node 8 Details
• Add a buildError event to bundler Details
• Use process.env.PARCEL_MAX_CONCURRENT_CALLS environment variable Details

• Fix Sass dependencies can not be watched when includePaths is a relative path Details
• Replaced fwd slashes with backslashes for win to fix sass deps watch Details
• Fix sourcemap file size in report Details
• fix build not exiting in dev env Details
• Prevent postcss-modules plugin config from being deleted after first run Details

• Set user provided NODE_ENV if provided with build command Details
• Fix bugs related to watching symlinks Details
• add cache-dir option to cli Details
• Fix tree-shaking DCE Details
• Fix writing hashed bundle names to the cache Details

• Fix unintended Vue asset supplemental code insertion Details
• fix 'Cannot read property 'posthtml' of null Details

• fix relative paths being the same as node modules Details
• Fix ES6 re-export of CommonJS modules with tree shaking Details

• Tree shaking scope hoisting for ES6 and CommonJS modules Details
• Put filewatcher in a worker, for better stability and performance Details
• Cache resolved paths of dependencies Details
• Custom less filemanager Details
• support for sass specific import syntax Details
• Allow --https for watch Details
• Fix browser entry-point resolution Details
• Use config.locals to render pug template Details
• Use async modules when possibles Details
• Add a bundlestart event Details
• Add unit tests for line counter Details
• Use async FS in tests Details
• Use async fs on new linecounter tests Details
• Make CSS assets async Details
• Enable posthtml-parse options in posthtmlrc Details
• Enforce Prettier (check if prettier is run in lint script) Details
• Add support for Cargo workspaces in Rust integration Details
• Surface Bundler error to browser Details
• Programatically pass env vars as a whitelist Details

• Fix bundle hoisting when asset is already in the common bundle Details
• Only resolve env vars on bundling when --target=browser Details
• improve the time reported by the bundler Details
• clear console before accepting updates, not after Details
• Lookup correct generated output for bundle type in RawPackager Details
• Remove extra argument passed to addAssetToBundle in JSPackager Details
• Fix indented syntax type for single file vue components Details
• Fix Vue asset supplemental code concatenation Details
• Add dependencies referenced by posthtml-include Details
• node-sass accepts importer as single function or array of functions Details
• Get mtime of folder on wildcard imports Details
• Fix vue test Details
• Fix absolute and tilde paths for url dependencies Details
• Fix failing appveyor test Details
• Fix worker environment variable Details
• Add test/dist to .prettierignore Details
• Fix typo in uglify.js Details
• Pass compiler of @vue/component-compiler-utils to parser. Details
• Fix package.json configs Details
• change Uglify to Terser Details

• Don’t pass package.json and options over IPC Details

• Loading modules with AMD Defines Details

• Add support for multiple entry points Details
• Support source field in package.json to enable babel on symlinked modules Details
• Expose modules as UMD Details
• Use parcel's resolver for sass imports Details
• Update default browser engines to > 0.25% marketshare Details
• Ignore dependencies in falsy branches Details
• Clear the console in browser on each HMR Details
• Watch directories instead of individual files to fix EMFILE errors Details

• Prevent build from breaking when .scss file is empty Details
• Handle empty config files Details
• Update dependency with security vuln Details
• Minor change to mkHandle in workerfarm Details
• Don't start server if target isn't browser Details
• Let worker return early instead of throw on unknown messages Details
• change default behaviour to keep default values of HTML form elements Details
• Fix autoinstall infinite loop Details
• Allow spaces in filenames Details
• Update deps Details
• Fix reference pass error in package config Details
• Remove eval usage. Fixes CSP cases. Details
• Remove jsnext:main Details
• fix for outFile option; respect file-extension Details

• Fix scoped plugin packages Details
• Fix writing files in subfolders inside dist directory Details
• Update addBundleLoader to accept multiple targets Details
• Fix sourcemap reference in JS output Details
• Sourcemap sourceRoot Details
• Fix serving files with query params Details
• Give priority to styl files in StylusAsset resolver Details
• Bump dependencies Details
• Fix asset size always be zero when building vue project Detailds
• Custom workerfarm, BI-Directional IPC - run all npm/yarn installs on the main process Details

• Add .vue file support Details
• New faster resolver supporting absolute and tilde paths, and aliases Details
• Content hash output file names in production Details
• Automatically install missing dependencies that you require in your code Details
• Production sourcemaps support via uglify Details
• Add Pug and Jade support Details
• Add GLSL assets support Details
• Add overlay for build errors when using HMR Details
• Implement pipelines to compose multiple asset types together Details
• Add --hmr-port and --hmr-hostname options to parcel watch Details
• Add support for specifying SSL certificate & key Details
• Allow specifying which browser to open with --open option Details
• Add data config option so it is possible to include global scss variables Details
• Add --log-level option Details
• Add support for data attr of object element Details
• Add useBuiltIns babel-preset-env option Details
• Support code splitting and loading WASM with --target=node Details

• Fix hmr runtime error Details
• Add server reference to bundler Details
• Fix error when no "targets" options in .babelrc Details
• Refactor prettifySize Details
• Fix property descriptor of config.internal in transforms/babel.js Details
• only transform safe cssnano minifiers Details
• fix electon hmr bug Details
• Fix HMR hostname in browser Details
• Fix srcset not working for source element Details
• Update htmlnano Details
• Fix svg dependencies not being found when using minification Details
• Set TypeScript option esModuleInterop to true by default Details
• HTML bundle serving bug Details
• Change default public-url to / Details
• Make --help same as help command Details
• Make -h same as help command Details
• Close hmr server when HMRServer.stop() is called Details
• Fix methods of LazyPromise Details
• Ignore require if it is defined as a local variable Details
• Check browserslist prop in package.json for environments Details

• JSX support for Nerv Details
• Add JSX support for Hyperapp. Details

• Fix babel handling for node: DEFAULT_ENGINES Details
• Remove unnecessary files from npm Details
• Use babel-register for tests only with node < 8 Details
• remove call to window.location Details

• Update HMRServer handleSocketError for ErrorEvent Details

• Automatically transpile dependencies with babel-preset-env Details
• Add no-config support for jsx Details
• Add "--target=node" and "--target=electron" option to produce Node/electron friendly bundles Details
• Log bundle metrics Details
• Node 6 support Details
• Add WebManifestAsset to handle W3C webmanifest Details
• Add support for optional dependencies Details
• support svg <use> elements Details
• Auto-install peerDependencies Details
• Inject HTML tag if missing Details
• Add JSON5 support Details
• Implement support for <img srcset="..."> Details
• Add .toml asset support Details
• Warn instead of error when an fs call cannot be evaluated Details
• Add support for HTML meta assets Details
• Add --out-file option Details
• Add Access-Control header for CORS Details

• Remove -h alias for hmr-port option Details
• Add 'id' to the module variable Details
• Preserve asset's search and hash Details
• Always add bundle-loader module to the bundle Details
• Launch https websocket server is --https Details
• Fix PromiseQueue returning null when there are no jobs Details
• Correctly serialize YAML to JS Details
• Update parser to treat file extensions as case-insensitive Details
• Add babel-template and babel-types to package.json Details
• Improve Code Coverage Details
• Safe cssnano transforms by default Details
• Make sure bundles is an array in loadBundlesLazy Details
• Bump dependencies Details
• Allows for dots in lazyloaded file names Details
• Add missing packages for pnpm to work Details
• pass lowerCaseAttributeNames: true to posthtml-parser (fix version bump) Details

• Support .htm extension Details

• Fix rust projects with hyphenated names Details
• Purify sourcemaps (Prevent babel from giving invalid mappings) Details
• Don't drop console statements by default in uglifyjs Details
• Fix for ipc closed error in tests Details

• SourceMap support Details
• Custom bundleloader and wasm support Details
• Rust support Details
• Ability to set HMR port Details
• Support .env files Details
• Hotreload css requires in html Details
• Minify JSON Details
• Ability to set HMR hostname Details
• Ability to specify amount of workers using PARCEL_WORKERS environment variable Details
• Warning emoji Details

• Virtualpaths, throw file not found error Details
• Transform HTML prior to collecting dependencies Details
• Find a[href] dependencies when attrs precede it Details
• Resolve URI-encoded assets Details
• Public-url not an os path Details
• Invalidate cache when parent dependencies change Details
• Invalidate cache on config change Details
• Circular bundles Details
• Possibly ignore fs using browser-resolve config Details
• Do not use global window inside hmr, fixes web worker issues Details
• Improved worker startup times Details
• Parse // as a valid url Details
• Improve windows emoji console detections Details

• Changelog Details

• http hot reload server printing location as https://... Details
• Execute bundle() when calling Bundler.middleware() Details
• Always parse dependencies if babel ran. Details

• HTTPS server support Details
• GraphQL Support Details
• Webworker Support Details
• CSSNano configuration Details
• HTMLNano configuration Details
• Support async plugin loading Details
• Add code sample section to ISSUE_TEMPLATE Details
• Add url dependency for serviceWorker.register calls Details
• Fix ignored babel files Details

• log-symbols fallback for cross-platform emoji compatibility Details
• Use hostname for websocket connection Details
• Standardize empty implementation comment Details
• Handle appstore url scheme Details
• bundling issues when asset parent & commonBundle types differ Details
• Handle empty assets Details
• Minify Prelude.js Details

• Maintain html spacing between tags when minimizing Details
• Incorrect bundle path for raw Assets Details

• Reason Asset Type Details
• Automatically install parser dependencies Details
• UglifyES config support Details
• Display absolute path on failed dependency resolve Details
• Support .editorconfig Details
• Tests for ES6 Modules resolver Details
• ESLint Details

• Parse port option as integer Details
• Make cli.js Node 6 compatible Details
• Remove arrow function from hmr-runtime - IE support Details
• Start server before bundling Details
• Deterministic bundle trees Details
• Resolve "module", "jsnext:main" and "browser" before "main" in Package.json Details
• Remove filename unsafe characters Details
• Don't hash root file Details
• Use cross-spawn for autoinstalling dependencies on windows Details

• Opencollective Details
• Use JSON5 to parse config files Details
• Move JSAsset options gathering into separate function Details

• Don't use template literals in builtins - IE support Details
• Merge tsconfig.json with defaults Details
• Change parse-json requires to JSON5 Details
• Register .pcss extension to CSSAsset Details
• Websocket error handling Details
• Development server index file Details

• Coffeescript support Details
• Reload html on change Details
• --open option to automatically launch in default browser Details
• Prettier Details
• Code of conduct Details
• User friendly server errors and automatic port switching Details
• Version option to command description Details
• Add badges to readme Details
• Support JSON comments Details
• Add AppVeyor CI Details
• Use UglifyES instead of UglifyJS Details

• Bundle-loader when using esModule Details
• Use var over let in builtins for IE support Details
• Add jsm to javascript extensions Details
• Log pluginload errors Details
• Global env problem Details
• Exit on build error when using build command Details
• Remove circular require in Asset.js Details
• Give high priotity to extension of parent Details
• Fallback to os.cpus() for cpu count Details
• Windows test issues Details
• Raw Asset loading Details
• Normalize path on windows Details
• Make hmr-runtime ES3 compatible Details
• Dynamically importing js assets with raw assets children Details
• Package.json loading issues for plugin loading Details

• Typescript support Details
• Browser gets notified of errors Details
• Community section to Readme Details
• More helpfull json parsing error messages using parse-json Details
• Issue template Details

• Print stack traces on error Details
• Merge postcss-modules config Details
• Default to NODE_ENV development on serve Details
• Disable flakey macOS FS events in watcher in the tests Details
• Sort child bundles by asset names to avoid race condition in tests Details

• Add version to cache key Details
• Travis tests environment, build script and contribution docs Details

• File url bugfix for Firefox Details
• Windows path bugfix Details
• Default only exports Details
• Public URL in normalizeOptions Details
• Do not try to import data:, tel:, mailto:, something: URLS Details

• Add github repository to package.json Details

• Improved public url checking using is-url instead of regex Details

• babel-preset-es2015 removed from dev dependencies Details

• Initial Parcel-bundler core