biome.jsonc

{
	"$schema": "https://biomejs.dev/schemas/1.9.3/schema.json",
	"linter": {
		"rules": {
			"correctness": {
				"noUnusedImports": "error",
				"noUnusedVariables": "error",
				"noUnusedPrivateClassMembers": "error",
				"useArrayLiterals": "error",
				"useHookAtTopLevel": "error",
				"useExhaustiveDependencies": {
					"level": "error",
					"options": {
						"hooks": [
							{
								"name": "useLiveQuery", // react-dexie
								"closureIndex": 0,
								"dependenciesIndex": 1
							}
						]
					}
				}
			},
			"nursery": {
				"useSortedClasses": {
					"level": "error",
					"options": {
						"attributes": ["className"], // react
						"functions": ["cn"] // shared/ui/cn.ts
					}
				}
			},
			"performance": {
				"noBarrelFile": "error"
			},
			"style": {
				"noDefaultExport": "error",
				"noNamespace": "error",
				"noNamespaceImport": "error",
				"noNegationElse": "error",
				"useBlockStatements": "error",
				"useCollapsedElseIf": "error",
				"useConsistentArrayType": {
					"level": "error",
					"options": {
						"syntax": "generic"
					}
				},
				"useFilenamingConvention": {
					"level": "error",
					"options": {
						"requireAscii": true,
						"filenameCases": ["kebab-case"]
					}
				},
				"useForOf": "error",
				"useFragmentSyntax": "error",
				"useNamingConvention": "error",
				"useShorthandAssign": "error"
			},
			"suspicious": {
				"noConsoleLog": "error",
				"useAwait": "error",
				"noConstEnum": "error"
			}
		}
	},
	"formatter": {
		"attributePosition": "multiline"
	},
	"files": {
		"ignore": [
			".DS_Store",
			".idea",
			"node_modules",
			"dist",
			"coverage",
			"playwright-report",
			"test-results",
			".react-router",
			".env",
			".wrangler",
			".vercel",
			"data"
		]
	},
	"overrides": [
		{
			"include": [
				"*.config.ts", // root level configs use default exports
				"packages/*/*.config.ts", // root level config for workspaces
				"src/main.ts" // some engines and frameworks use default exports
			],
			"linter": {
				"rules": {
					"style": {
						"noDefaultExport": "off"
					}
				}
			}
		},
		{
			"include": ["*.spec.ts", "*.spec.tsx"], // because in order to mock top-level function, the test suite should import the whole ESModule
			"linter": {
				"rules": {
					"style": {
						"noNamespaceImport": "off"
					}
				}
			}
		},
		{
			"include": ["**/tsconfig.json", "**/tsconfig.*.json"], // its really JSONC/JSON5 format despite the name
			"json": {
				"parser": {
					"allowComments": true
				}
			}
		},
		{
			"include": ["**/package.json"], // because NPM CLI doesn't preserve format and put new lines where it shouldn't by formatter definitions, so the only option is to obey to NPM
			"formatter": {
				"lineWidth": 1
			}
		}
	]
}