FINALLY

console.log

isZero(0)
zero!
FINALLY
isZero()
not zero
FINALLY
error caught

finally.js

/* eslint-disable require-jsdoc */
async function isZero(param) {
  try {
    if (param === 0) {
      console.log('zero!');
    }
    else {
      throw new Error('not zero');
    }
  }
  catch (error) {
    console.log(error.message);
    throw error;
  }
  finally {
    console.log('FINALLY');
  }
}

console.log('isZero(0)');
isZero(0);

console.log('isZero()');
isZero().catch(() => console.log('error caught'));