class Tex {
    type = 'Text' as const;
}

class Svg {
    type = 'Svg' as const;
}

const map = {
    text: Tex,
    svg: Svg
}

type M = typeof map;

export function bar<T extends keyof M>(type: T): M[T] {
    const s =  map[type];
    return s;
}

const cons = bar('text');
const a = new cons();
const t = s.type;