Can't console log in short hand arrow function when using Typescript

Question

When debugging an arrow function in javascript you can write like this:

const sum = (a, b) => console.log(a, b) || a + b;

This will first console log a and b and then return the actual result of the function. But when using Typescript it will complain about console log not being able to be tested for truthiness:

An expression of type 'void' cannot be tested for truthiness

This feels like a valid complaint, but at the same time it's a neat trick to debug arrow functions and I would very much like to not have to add curly braces everywhere I have arrow functions if possible.

Even though the log is only there temporarily, are there any way to get Typescript to accept this pattern without using @ts-ignore?

Answer 1

Change it to use comma operator:

const logger = (a, b) => (console.log(a, b), a + b);