const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
const map = Array(128)
chars.split('').forEach((c, i) => (map[c.charCodeAt(0)] = i.toString(4).padStart(3, 0)))
const otherAtob = (string, tmp = '', res = []) => {
  for (let i = 0; i < string.length; i++) {
    tmp += map[string.charCodeAt(i)] || ''
    if (tmp.length >= 4) {
      res.push(String.fromCharCode(parseInt(tmp.slice(0, 4), 4)))
      tmp = tmp.slice(4)
    }
  }
  return res.join('')
}

const map = [...'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/']
.reduce((a, v, i) => (a[v.charCodeAt(0)] = i.toString(4).padStart(3, 0), a), [])
const myAtob2 = (s, r = '') => (s
  .replace(/[^]/g, c => map[c.charCodeAt(0)]||"")
  .replace(/.{4}/g, b => r += String.fromCharCode(parseInt(b, 4))), r)

const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
const map = Array(128)
chars.split('').forEach((c, i) => (map[c.charCodeAt(0)] = i.toString(4).padStart(3, 0)))
const otherAtob = (string, tmp = '', res = []) => {
  for (let i = 0; i < string.length; i++) {
    tmp += map[string.charCodeAt(i)] || ''
    if (tmp.length >= 4) {
      res.push(String.fromCharCode(parseInt(tmp.slice(0, 4), 4)))
      tmp = tmp.slice(4)
    }
  }
  return res.join('')
}