algebraic-effect-example.js

function double(x) {
  if (!Number.isFinite(x)) {
    throw `double(x): ${x} is not a number`;
  }

  return x * 2
}
 
// We don't have to be aware anymore!
function doublePlusOne(x) {
  return double(x) + 1;
}
 
// anyone consuming our code can wrap at the top level!
try {
  doublePlusOne("😵")
} catch (error) {
  ErrorService.log(error);
 
  if (!env.PROD) {
    console.error(error)
  }
}