v5.0.0

Features

• increase minimal node.js version
• update dependencies
• remove memory-fs dependency
• real fs is usable, no join expected from filesystem
• track dependencies while resolving
• add support for arrays in alias
• add support for Yarn PnP
  • PnP tracks dependency to the .pnp.js file
• add support for alias: { something: false }
• generate and publish type declaration file for typescript
• exports field support
  • add exportsFields option
  • add conditionNames option
• self reference resolving when exports field is present
• add restrictions option, which allows to restrict the allowed paths to resolve too
• add fragment support
• add roots option
• add fullySpecified option for better node.js esm compat
• refactor CacheFileSystem
  • allow only sync usage
  • support second options argument for all methods
• add support for imports field in package.json
• add new fallback option, which is like alias but is only activated when normal resolving fails

Removals

• remove concord
• remove deprecated tapable compat layer
• remove .context and .loader from node API
• remove NodeJsInputFileSystem

Bugfixes

• fixes lowercase file letters
• fixes "main": "." crash
• fix purging of readdir
• module/ now correctly resolves to directory and not to module.js as file
• fix lisence field in package.json
• Fix bug when instead of package resolving in modules file with same name was resolved

Contribution

• refactor join and normalize to use node.js path instead of memory-fs
• linting update
• code style update (spread operator, let/const, arrow functions)
• add a lot of type information
• Linting type information
• Linting formating

Performance

• optimize number of fs accesses
• serialize all operations to reduce number of fs accesses
• deduplicate duplicate entries in aliasFields, descriptionFiles, extensions, modules, mainFields and mainFiles

Internals

• Options are normalized separatly
• improve handling of scoped packages @scope/name