Function modeLabel

pmcaptcha/pmcaptcha.ts:812–819

(m: CaptchaMode)

  return {
    [CaptchaMode.MATH]:       "算术验证",
    [CaptchaMode.TEXT]:       "关键词验证",
    [CaptchaMode.IMG_DIGIT]:  "图片验证（纯数字）",
    [CaptchaMode.IMG_MIXED]:  "图片验证（字母+数字）",
  }[m] ?? m;
}

function mathQuestion(): { question: string; answer: string } {
  const rand  = (min: number, max: number) => Math.floor(Math.random() * (max - min + 1)) + min;
  const type  = rand(0, 5);

  if (type === 0) {