How to make letter numbering?

Question

JavaScript

How to make the letter numbering go through the loop? A,B,C...Z,AA,AB,AC etc.

In general, we need an analogue as in css, only through js.

counter-increment: col; 
content: counter(col, upper-alpha);

Answer 1

methods: {
  createAlphaIndex(num) {
    const base = 26;
    let str = '';

    do {
      const mod = num % base;
      num = num / base | 0;
      str = (mod ? String.fromCharCode('A'.charCodeAt(0) + mod - 1) : (--num, 'Z')) + str;
    } while(num);

    return str;
  },
},

<div v-for="i in 1000">{{ createAlphaIndex(i) }}</div>

https://jsfiddle.net/bh0cep84/