biome.json

{
  "$schema": "https://biomejs.dev/schemas/1.7.3/schema.json",
  "vcs": {
    "enabled": true,
    "clientKind": "git",
    "useIgnoreFile": true,
    "defaultBranch": "master"
  },
  "files": {
    "include": ["**/*.js", "**/*.jsx", "**/*.ts", "**/*.tsx"],
    "ignore": ["common/font.ts", "common/twemoji.ts"]
  },
  "formatter": {
    "enabled": true,
    "formatWithErrors": false,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineEnding": "lf",
    "lineWidth": 80,
    "attributePosition": "auto"
  },
  "organizeImports": { "enabled": true },
  "linter": {
    "enabled": true,
    "rules": {
      "recommended": false,
      "a11y": { "noBlankTarget": "error" },
      "complexity": {
        "noExtraBooleanCast": "error",
        "noMultipleSpacesInRegularExpressionLiterals": "error",
        "noUselessCatch": "error",
        "noUselessConstructor": "error",
        "noUselessLoneBlockStatements": "error",
        "noUselessRename": "error",
        "noUselessTernary": "error",
        "noVoid": "error",
        "noWith": "error",
        "useLiteralKeys": "error",
        "useRegexLiterals": "error"
      },
      "correctness": {
        "noChildrenProp": "error",
        "noConstAssign": "error",
        "noConstantCondition": "error",
        "noEmptyCharacterClassInRegex": "error",
        "noEmptyPattern": "error",
        "noGlobalObjectCalls": "error",
        "noInvalidConstructorSuper": "error",
        "noInvalidUseBeforeDeclaration": "off",
        "noNewSymbol": "error",
        "noPrecisionLoss": "error",
        "noSelfAssign": "error",
        "noSwitchDeclarations": "error",
        "noUndeclaredVariables": "warn",
        "noUnreachable": "error",
        "noUnreachableSuper": "error",
        "noUnsafeFinally": "error",
        "noUnusedVariables": "warn",
        "useExhaustiveDependencies": "warn",
        "useHookAtTopLevel": "error",
        "useIsNan": "error",
        "useJsxKeyInIterable": "error"
      },
      "security": {
        "noDangerouslySetInnerHtml": "error",
        "noGlobalEval": "error"
      },
      "style": {
        "noCommaOperator": "error",
        "noVar": "warn",
        "useBlockStatements": "off",
        "useConst": "error",
        "useSingleVarDeclarator": "error"
      },
      "suspicious": {
        "noAssignInExpressions": "warn",
        "noAsyncPromiseExecutor": "error",
        "noCatchAssign": "error",
        "noClassAssign": "error",
        "noCommentText": "error",
        "noCompareNegZero": "error",
        "noConfusingLabels": "error",
        "noControlCharactersInRegex": "error",
        "noDebugger": "error",
        "noDoubleEquals": "error",
        "noDuplicateCase": "error",
        "noDuplicateClassMembers": "error",
        "noDuplicateJsxProps": "error",
        "noDuplicateObjectKeys": "error",
        "noDuplicateParameters": "error",
        "noEmptyBlockStatements": "warn",
        "noExportsInTest": "error",
        "noFallthroughSwitchClause": "error",
        "noFocusedTests": "error",
        "noFunctionAssign": "error",
        "noGlobalAssign": "error",
        "noImportAssign": "error",
        "noMisleadingCharacterClass": "error",
        "noPrototypeBuiltins": "error",
        "noRedeclare": "error",
        "noSelfCompare": "error",
        "noShadowRestrictedNames": "warn",
        "noSkippedTests": "warn",
        "noUnsafeNegation": "error",
        "useDefaultSwitchClauseLast": "error",
        "useValidTypeof": "error"
      }
    }
  },
  "javascript": {
    "formatter": {
      "jsxQuoteStyle": "double",
      "quoteProperties": "asNeeded",
      "trailingCommas": "es5",
      "semicolons": "asNeeded",
      "arrowParentheses": "always",
      "bracketSpacing": true,
      "bracketSameLine": false,
      "quoteStyle": "single",
      "attributePosition": "auto"
    },
    "globals": [
      "document",
      "navigator",
      "window",
      "jest",
      "test",
      "describe",
      "expect"
    ]
  }
}