A quick reference to my projects biome rules

biome-json-example.json

{
  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
  "vcs": {
    "enabled": false,
    "clientKind": "git",
    "useIgnoreFile": false
  },
  "files": {
    "ignoreUnknown": false,
    "ignore": [
      "node_modules",
      "node_modules/**",
      ".next",
      "dist",
      "build",
      "public",
      "internal-docs",
      "internal-docs/**",
      "*.md",
      "*.json",
      "*.lockb",
      "*.lock",
      "*.lock.json",
      "*.lock.yaml",
      "*.lock.yml",
      "*.lock.toml",
      "*.lock.ts",
      "*.lock.tsx",
      "*.cursor"
    ]
  },
  "formatter": {
    "enabled": true,
    "useEditorconfig": true,
    "formatWithErrors": false,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineEnding": "lf",
    "lineWidth": 80,
    "attributePosition": "auto",
    "bracketSpacing": true
  },
  "organizeImports": {
    "enabled": true
  },
  "linter": {
    "enabled": true,
    "rules": {
      "recommended": false,
      "a11y": {
        "noBlankTarget": "error"
      },
      "complexity": {
        "noUselessThisAlias": "error",
        "noUselessTypeConstraint": "error"
      },
      "correctness": {
        "noChildrenProp": "error",
        "noUnusedVariables": "off",
        "useArrayLiterals": "off",
        "useJsxKeyInIterable": "error"
      },
      "security": {
        "noDangerouslySetInnerHtmlWithChildren": "error"
      },
      "style": {
        "noNamespace": "error",
        "useAsConstAssertion": "error",
        "useBlockStatements": "off"
      },
      "suspicious": {
        "noCommentText": "error",
        "noDuplicateJsxProps": "error",
        "noExplicitAny": "error",
        "noExtraNonNullAssertion": "error",
        "noMisleadingInstantiator": "error",
        "noUnsafeDeclarationMerging": "error",
        "useNamespaceKeyword": "error"
      }
    }
  },
  "javascript": {
    "formatter": {
      "jsxQuoteStyle": "double",
      "quoteProperties": "asNeeded",
      "trailingCommas": "all",
      "semicolons": "asNeeded",
      "arrowParentheses": "always",
      "bracketSameLine": false,
      "quoteStyle": "single",
      "attributePosition": "auto",
      "bracketSpacing": true
    }
  },
  "overrides": [
    {
      "include": ["*.ts", "*.tsx", "*.mts", "*.cts"],
      "linter": {
        "rules": {
          "correctness": {
            "noConstAssign": "off",
            "noGlobalObjectCalls": "off",
            "noInvalidBuiltinInstantiation": "off",
            "noInvalidConstructorSuper": "off",
            "noNewSymbol": "off",
            "noSetterReturn": "off",
            "noUndeclaredVariables": "off",
            "noUnreachable": "off",
            "noUnreachableSuper": "off"
          },
          "style": {
            "noArguments": "error",
            "noVar": "error",
            "useConst": "error"
          },
          "suspicious": {
            "noClassAssign": "off",
            "noDuplicateClassMembers": "off",
            "noDuplicateObjectKeys": "off",
            "noDuplicateParameters": "off",
            "noFunctionAssign": "off",
            "noImportAssign": "off",
            "noRedeclare": "off",
            "noUnsafeNegation": "off",
            "useGetterReturn": "off"
          }
        }
      }
    },
    {
      "include": ["*.ts", "*.tsx", "*.mts", "*.cts"],
      "linter": {
        "rules": {
          "correctness": {
            "noConstAssign": "off",
            "noGlobalObjectCalls": "off",
            "noInvalidBuiltinInstantiation": "off",
            "noInvalidConstructorSuper": "off",
            "noNewSymbol": "off",
            "noSetterReturn": "off",
            "noUndeclaredVariables": "off",
            "noUnreachable": "off",
            "noUnreachableSuper": "off"
          },
          "style": {
            "noArguments": "error",
            "noVar": "error",
            "useConst": "error"
          },
          "suspicious": {
            "noClassAssign": "off",
            "noDuplicateClassMembers": "off",
            "noDuplicateObjectKeys": "off",
            "noDuplicateParameters": "off",
            "noFunctionAssign": "off",
            "noImportAssign": "off",
            "noRedeclare": "off",
            "noUnsafeNegation": "off",
            "useGetterReturn": "off"
          }
        }
      }
    },
    {
      "include": ["*.ts", "*.tsx", "*.mts", "*.cts"],
      "linter": {
        "rules": {
          "correctness": {
            "noConstAssign": "off",
            "noGlobalObjectCalls": "off",
            "noInvalidBuiltinInstantiation": "off",
            "noInvalidConstructorSuper": "off",
            "noNewSymbol": "off",
            "noSetterReturn": "off",
            "noUndeclaredVariables": "off",
            "noUnreachable": "off",
            "noUnreachableSuper": "off"
          },
          "style": {
            "noArguments": "error",
            "noVar": "error",
            "useConst": "error"
          },
          "suspicious": {
            "noClassAssign": "off",
            "noDuplicateClassMembers": "off",
            "noDuplicateObjectKeys": "off",
            "noDuplicateParameters": "off",
            "noFunctionAssign": "off",
            "noImportAssign": "off",
            "noRedeclare": "off",
            "noUnsafeNegation": "off",
            "useGetterReturn": "off"
          }
        }
      }
    }
  ]
}