Count sort made while counting every single key pressed

CountSort.js

// Count sort I coded while counting every single key I press
// Watch video here:
// https://youtu.be/HFgzhYHM4QM
function countSort(vs) {
    const cs = Array(Math.max(...vs) + 1).fill(0);
    let res = [];
    for (let v of vs)
        cs[v]++;
    for (let v = 0; v < cs.length; v++) {
        for (let c = 0; c < cs[v]; c++)
            res.push(v);
    }
    return res;
}

// Testing code
const test = [34, 3, 13, 5, 8, 13, 21, 21, 55, 34, 3, 3, 2, 1, 34, 8];
console.log(countSort(test));
console.log(test.sort((a, b) => a - b));

// Count sort I originally planned to code during the video above:
function countSort(vs) {
    const max = Math.max(...vs);
    const counts = Array(max + 1).fill(0);
    for (const v of vs)
        counts[v]++;
    
    const res = [];
    for (let i = 0; i <= max; i++)
        for (let j = 0; j < counts[i]; j++)
            res.push(i);
    return res;
}

// Count sort but only using letter 'i' for variable names
// Watch here (the second part of the video above):
// https://youtu.be/HFgzhYHM4QM?t=792
function iiiiiiiii(iiiiii){
    let ii = Array(Math.max(...iiiiii) + 1).fill(0);
    for (let i of iiiiii)
        ii[i]++;

    let iii = [];
    for (let i = 0; i < ii.length; i++)
        for (let iiii = 0;
            iiii < ii[i]; iiii++)
            iii.push(i);
    return iii;
}

// Testing code
const test = [34, 3, 13, 5, 8, 13, 21, 21, 55, 34, 3, 3, 2, 1, 34, 8];
console.log(iiiiiiiii(test));
console.log(test.sort((a, b) => a - b));