@stacksjs/ts-validation/dist/lib/isIMEI.d.ts

A simple TypeScript starter kit using Bun.

export default function isIMEI(str: string, options: IsIMEIOptions): boolean {
  assertString(str)
  options = options || {}


  let imeiRegex = imeiRegexWithoutHyphens

  if (options.allow_hyphens) {
    imeiRegex = imeiRegexWithHyphens
  }

  if (!imeiRegex.test(str)) {
    return false
  }

  str = str.replace(/-/g, '')

  let sum = 0
  let mul = 2
  const l = 14

  for (let i = 0; i < l; i++) {
    const digit = str.substring(l - i - 1, l - i)
    const tp = Number.parseInt(digit, 10) * mul
    if (tp >= 10) {
      sum += (tp % 10) + 1
    }
    else {
      sum += tp
    }
    if (mul === 1) {
      mul += 1
    }
    else {
      mul -= 1
    }
  }
  const chk = ((10 - (sum % 10)) % 10)
  if (chk !== Number.parseInt(str.substring(14, 15), 10)) {
    return false
  }
  return true
};