Currently, I have something like this

function iconPic(x){
    switch(x) {
        case 3: return "Icon2.svg";
        case 2: return "Icon1.svg";
        case 1: return "Icon.svg";
        default: return "Icon.png";
    }
}

Instead I want to have something like this

var icons = array_of_icon_names_in_the_icons_directory;

So icons[0] would output "Icon.png" and icons[1] would output "Icon.svg" and so on

I found somewhere that this can be done with require('fs') somehow, but doing that won't work in web browsers. I need it to work in web browsers.

The files are like this:

index.html
thisProgram.js
icons
    Icon2.svg
    Icon1.svg
    Icon.svg
    Icon.png