@zamatica/util

General-purpose TypeScript utilities. No framework dependencies.

Install

bun add @zamatica/util
# or: npm install @zamatica/util

API

assertNever(value: never, message?: string): never

Exhaustiveness helper for discriminated unions. Throws at runtime if hit; produces a TypeScript error if a case isn't handled.

import { assertNever } from '@zamatica/util';

type Shape = { kind: 'circle' } | { kind: 'square' };

function area(s: Shape): number {
  switch (s.kind) {
    case 'circle': return Math.PI;
    case 'square': return 1;
    default: return assertNever(s);
  }
}

sleep(ms: number): Promise<void>

Promisified setTimeout.

import { sleep } from '@zamatica/util';

await sleep(100);

Development

From the workspace root:

bunx nx build util
bunx nx test util