@studnicky/v8/arguments-object

Disallows use of the arguments object inside functions. The arguments object prevents V8 from optimizing the function because it must handle the dynamic object allocation. Use rest parameters (...args) instead.

Fixable: No · Options: No · Suggested severity: error

✗ Incorrect

function sum() {
  let total = 0;
  for (let i = 0; i < arguments.length; i++) {
    total += arguments[i] as number;
  }
  return total;
}

function first() {
  return arguments[0];
}

✓ Correct

function sum(...args: number[]): number {
  let total = 0;
  for (let i = 0; i < args.length; i++) { total += args[i] ?? 0; }
  return total;
}

function first(...args: unknown[]): unknown {
  return args[0];
}