errors.ts

import { someAsyncTask } from 'a-library'

async function doSomething () {
  try {
    const results = await someAsyncTask();
    const betterResults = results.map(stuff => { betterStuff: stuff });
    return results;
  } catch (error) {
    if (error instanceof Error){
      console.error(error.message)
    }
    else {
      // what do I do with any/unknown? throw?
    }
  }
}