Analyzer

Enhancements

• Import sorting is safe to apply now, and it will be applied when running check --apply instead of check --apply-unsafe.

• Import sorting now handles Bun imports bun:<name>, absolute path imports /<path>, and Node's subpath imports #<name>. See our documentation for more details. Contributed by @Conaclos

CLI

Bug fixes

• Fix #319. The command biome lint now shows the correct options. Contributed by @ematipico
• Fix #312. Running biome --version now exits with status code 0 instead of 1. Contributed by @nhedger
• Fix a bug where the extends functionality doesn't carry over organizeImports.ignore. Contributed by @ematipico

New features

• Add support for BIOME_BINARY environment variable to override the location of the binary. Contributed by @ematipico

• Add option --indent-width, and deprecated the option --indent-size. Contributed by @ematipico

• Add option --javascript-formatter-indent-width, and deprecated the option --javascript-formatter-indent-size. Contributed by @ematipico

• Add option --json-formatter-indent-width, and deprecated the option --json-formatter-indent-size. Contributed by @ematipico

• Add option --daemon-logs to biome rage. The option is required to view Biome daemon server logs. Contributed by @unvalley

• Add support for logging. By default, Biome doesn't log anything other than diagnostics. Logging can be enabled with the new option --log-level:

  biome format --log-level=info ./src
  

  There are four different levels of logging, from the most verbose to the least verbose: debug, info, warn and error. Here's how an INFO log will look like:

  2023-10-05T08:27:01.954727Z  INFO  Analyze file ./website/src/playground/components/Resizable.tsx
    at crates/biome_service/src/file_handlers/javascript.rs:298 on biome::worker_5
    in Pulling diagnostics with categories: RuleCategories(SYNTAX)
    in Processes formatting with path: "./website/src/playground/components/Resizable.tsx"
    in Process check with path: "./website/src/playground/components/Resizable.tsx"
  

  You can customize how the log will look like with a new option --log-kind. The supported kinds are: pretty, compact and json.

  pretty is the default logging. Here's how a compact log will look like:

  2023-10-05T08:29:04.864247Z  INFO biome::worker_2 Process check:Processes linting:Pulling diagnostics: crates/biome_service/src/file_handlers/javascript.rs: Analyze file ./website/src/playground/components/Resizable.tsx path="./website/src/playground/components/Resizable.tsx" path="./website/src/playground/components/Resizable.tsx" categories=RuleCategories(LINT)
  2023-10-05T08:29:04.864290Z  INFO biome::worker_7 Process check:Processes formatting: crates/biome_service/src/file_handlers/javascript.rs: Format file ./website/src/playground/components/Tabs.tsx path="./website/src/playground/components/Tabs.tsx" path="./website/src/playground/components/Tabs.tsx"
  2023-10-05T08:29:04.879332Z  INFO biome::worker_2 Process check:Processes formatting:Pulling diagnostics: crates/biome_service/src/file_handlers/javascript.rs: Analyze file ./website/src/playground/components/Resizable.tsx path="./website/src/playground/components/Resizable.tsx" path="./website/src/playground/components/Resizable.tsx" categories=RuleCategories(SYNTAX)
  2023-10-05T08:29:04.879383Z  INFO biome::worker_2 Process check:Processes formatting: crates/biome_service/src/file_handlers/javascript.rs: Format file ./website/src/playground/components/Resizable.tsx path="./website/src/playground/components/Resizable.tsx" path="./website/src/playground/components/Resizable.tsx"
  

Enhancements

• Deprecated the environment variable ROME_BINARY. Contributed by @ematipico
• Biome doesn't check anymore the presence of the .git folder when VCS support is enabled. Contributed by @ematipico

Configuration

New features

• Add option formatter.indentWidth, and deprecated the option formatter.indentSize. Contributed by @ematipico
• Add option javascript.formatter.indentWidth, and deprecated the option javascript.formatter.indentSize. Contributed by @ematipico
• Add option json.formatter.indentWidth, and deprecated the option json.formatter.indentSize. Contributed by @ematipico
• Add option include to multiple sections of the configuration
  • files.include;
  • formatter.include;
  • linter.include;
  • organizeImports.include; When include and ignore are both specified, ignore takes precedence over include

Bug fixes

• Fix #343, extends was incorrectly applied to the biome.json file. Contributed by @ematipico

Editors

Bug fixes

• Fix #404. Biome intellij plugin now works on Windows. Contributed by @victor-teles

• Fix #402. Biome format on intellij plugin now recognize biome.json. Contributed by @victor-teles

Formatter

Enhancements

• Use OnceCell for the Memoized memory because that's what the RefCell<Option> implemented. Contributed by @denbezrukov

JavaScript APIs

Linter

Bug fixes

• Fix #243 a false positive case where the incorrect scope was defined for the infer type. in rule noUndeclaredVariables. Contributed by @denbezrukov
• Fix #322, now noSelfAssign correctly handles literals inside call expressions.
• Changed how noSelfAssign behaves. The rule is not triggered anymore on function calls. Contributed by @ematipico

New features

• Add noEmptyCharacterClassInRegex rule. The rule reports empty character classes and empty negated character classes in regular expression literals. Contributed by @Conaclos

• Add noMisleadingInstantiator rule. The rule reports the misleading use of the new and constructor methods. Contributed by @unvalley

• Add noUselessElse rule. The rule reports else clauses that can be omitted because their if branches break. Contributed by @Conaclos

• Add noUnusedImports rule. The rule reports unused imports and suggests to remove them. Contributed by @Conaclos

  noUnusedVariables reports also unused imports, but don't suggest their removal. Once noUnusedImports stabilized, noUnusedVariables will not report unused imports.

• Add useShorthandAssign rule. The rule enforce use of shorthand operators that combine variable assignment and some simple mathematical operations. For example, x = x + 4 can be shortened to x += 4. Contributed by @victor-teles

• Add useAsConstAssertion rule. The rule enforce use of as const assertion to infer literal types. Contributed by @unvalley

• Add noMisrefactoredShorthandAssign rule. The rule reports shorthand assigns when variable appears on both sides. For example x += x + b Contributed by @victor-teles

Enhancements

• The following rules have now safe code fixes:

  • noNegationElse
  • noUselessLabel
  • noUselessTypeConstraint
  • noUnusedLabels
  • useConst
  • useEnumInitializers
  • useWhile

• noUnusedLabels no longer reports unbreakable labeled statements. Contributed by @Conaclos

• noUnusedVariables now reports unused TypeScript's type parameters. Contributed by @Conaclos

Bug fixes

• Fix #294. noConfusingVoidType no longer reports false positives for return types. Contributed by @b4s36t4

• Fix #313. noRedundantUseStrict now keeps leading comments.

• Fix #383. noMultipleSpacesInRegularExpressionLiterals now provides correct code fixes when consecutive spaces are followed by a quantifier. Contributed by @Conaclos

• Fix #397. useNumericLiterals now provides correct code fixes for signed numbers. Contributed by @Conaclos

• Fix 452. The linter panicked when it met a malformed regex (a regex not ending with a slash).

• Fix #104. We now correctly handle types and values with the same name.

Parser

• Enhance diagnostic for infer type handling in the parser. The 'infer' keyword can only be utilized within the 'extends' clause of a conditional type. Using it outside of this context will result in an error. Ensure that any type declarations using 'infer' are correctly placed within the conditional type structure to avoid parsing issues. Contributed by @denbezrukov

• Add support for parsing trailing commas inside JSON files:

  {
    "json": {
      "parser": {
        "allowTrailingCommas": true
      }
    }
  }
  

  Contributed by @nissy-dev

VSCode

What's Changed

Other changes

• fix(website): fix 1.2.2 schema by @ematipico in https://github.com/biomejs/biome/pull/509
• docs(website): fix dlx command by @ematipico in https://github.com/biomejs/biome/pull/511
• docs(website): fix schema (again) by @ematipico in https://github.com/biomejs/biome/pull/514
• docs: better documentation for stdin-file-path by @ematipico in https://github.com/biomejs/biome/pull/515
• docs: various updates and fixes by @ematipico in https://github.com/biomejs/biome/pull/519

Full Changelog: https://github.com/biomejs/biome/compare/cli/v1.2.2-nightly.1e3fc94...cli/v1.2.2-nightly.ee2e2ab