@repo/utils

Shared utility functions for the monorepo.

JSON types

• JsonPrimitive — string | number | boolean | null
• JsonValue — a JSON primitive, object, or array
• JsonObject — a string-keyed object containing JSON values

Math

• average(values: number[]): number | null — arithmetic mean, null for empty arrays
• median(values: number[]): number | null — median value, null for empty arrays
• nullMap<T, U>(value: T | null | undefined, fn: (v: T) => U): U | null — apply fn if value is non-null, otherwise return null

SvelteKit CORS

• createCorsHandle(options) — creates a SvelteKit Handle that adds CORS headers for configured paths. By default it applies to /api/, echoes explicitly allowed origins, and can use acceptAll for local development.

String

• toPascalCase(value: string): string — convert camelCase and snake_case values to labels