javascript - Position of a Immediately Executing Function

Question

I'm learning Node.js, and there is something I cannot understand.

I have a function and a Immediately Executing Function, like this:

(
    function foo(){
        console.log('foo was executed')
    }
)()

function foofun(){
    return 123
}
console.log(foofun())

When the IEF is at the beginning, the code executes right, but when the foofun() and it's console.log are at the beginning, this gave me this error:

Does it matters the position where is located the IEF? Why this happens?

question from:https://stackoverflow.com/questions/65888428/position-of-a-immediately-executing-function

Answer 1

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