Discussion on: TypeScript is wasting my time

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Replies for: As stated 2 times, I know this is mostly due to a lack of knowledge. So thanks a lot for the encouragements. I'm fully aware that a project with 80...

You should specify that notation not just the string type but concrete type Intl.NumberFormatOptions['notation']

  function formatNumber(value: number, lang: string = 'en') {
  const options = {
    notation: 'compact' as Intl.NumberFormatOptions['notation'],
    maximumFractionDigits: 1,
  };
   const formatter = Intl.NumberFormat(lang, options);
   return formatter.format(value);
}