Is there a way to call a function inside another function?

Question

I have the following code :


var f1 = document.getElementById("f"), 
f1 = function () {
var rd1 = new FileReader();
rd1.onload = function () {
              
             function assign () { 
                toto = function toto() {
                     // Code there
             }


        rd1.readAsBinaryString(f1.files[0]);
    }; 
f1.addEventListener('change', rd1);

What I want is to be able to call the function toto() outside of this above block. Is there a way to do that or the scope doesn't allow it ?

score 1 · Answer 1 · answered May 27 '21 at 14:05

1

Function declarations are scoped to the function they are defined in.

To access them outside, you need to explicitly assign them somewhere.

For example:

let toto = null;

function assign() {
     toto = function toto () { ... };
}

… however, scope aside, you are trying to call the function before it has been created as per the classic asynchronous problem so you'll need to rethink your approach.

answered May 27 '21 at 14:05

Quentin

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I see, and by the way you did, how at the end do you call the toto function ? – Abtchadou May 27 '21 at 14:12
`todo()` (at a point in time **after** `assign()` has been called) – Quentin May 27 '21 at 14:20
But in my case it would have been called inside the block by doing so, no ? – Abtchadou May 27 '21 at 14:26
Yes (which makes assigning it outside the block pointless). – Quentin May 27 '21 at 14:28

Is there a way to call a function inside another function?

1 Answers1