Omit a subset of properties from an object

const omit = (obj, keys) =>
    Object.keys(obj)
        .filter((k) => !keys.includes(k))
        .reduce((res, k) => Object.assign(res, { [k]: obj[k] }), {});

omit({ a: '1', b: '2', c: '3' }, ['a', 'b']); // { c: '3' }