JavaScript 隐藏手机号中间部分

function formatPhone(phone) {
  if (typeof phone == 'number') {
    phone = phone.toString();
  }
  return phone.substr(0, 3) + '****' + phone.substr(7, 11);
}
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function formatPhone(phone) {
  return phone.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2');
}
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// 有时间再补充
// for 循环应该是速度最快的
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