Issues within a function getting 'variable undefined' error

Question

A few years back I wrote a javascript library for a simple task. Today I had to visit it again, and I am not happy with my code. If it would just run... I know it ran back then but now I have no clue why it doesn't.

I call the function fixPersonnummer with the values it needs and then it crashes, saying that the variable fixedPersonnummer isn't defined. I tried to add var and let but that makes the result become whatever int I give the var. What have I done wrong?

function fixPersonnummer(personnummer, svarsLangd) {
    var len = personnummer.length;

    if (len === 13 && parseInt(svarsLangd) === 10) {
        removeStreck = removeDash(personnummer);
        fixedPersonnummer = removeCentuary(removeStreck);
    }
...

Answer 1

• In this code example removeStreck and fixedPersonnummer not initialized. Try to initialie this variables first.

Answer 2

is this variable "fixedPersonnummer" being used anywhere else in this file? can add the lines where this function is called or lines above this function