Question

I know that you can do this:

function first(a){
    a && console.log("true");
}

which is the same as:

function first(a){
    if(a){
        console.log("true");
    }
}

However, when I tried this:

function first(a){
    a && return false
}

It doesn’t work, and it throws me an error. Why is it giving me an error?

Answer 1

return can only be used in a statement on its own.

In a && return false it would be part of an expression, which is syntactically wrong.