电话号码屏蔽

Question

我正在尝试替换下面的字符串，如下所示：

我正在考虑的一些案例是：

//Ignore Special char
phone = "[phone]"
result = xxx-xxx-1234

phone = "1(800)555-0199"
result = xxx-xxx-0199

//Ignore Space
phone="555 555 1234"
result = xxx-xxx-1234

//if length >10 so only consider the last 10 digit
phone = "9898871234567" //only  consider 8871234567
result = xxx-xxx-4567

下面是我编写的js代码，但这并没有为我提供上述情况的正确结果。

var lastphdigit = phone.replace(/\d{3}(?!\d?$)/g, 'xxx-');

Answer 1

您可以尝试以下方法：

function formatPhoneNumber(phone) {
  //remove all non-digit characters
  phone = phone.replace(/\D/g, '');
  //if phone number is longer than 10 digits, keep only the last 10 digits
  if (phone.length > 10) {
    phone = phone.slice(-10);
  }
  //format the phone number as xxx-xxx-xxxx
  phone = phone.replace(/(\d{3})(\d{3})(\d{4})/, 'xxx-xxx-$3');
  return phone;
}

//example
var phone1 = "[phone]";
var phone2 = "1(800)555-0199";
var phone3 = "555 555 1234";
var phone4 = "9898871234567";

console.log(formatPhoneNumber(phone1)); //xxx-xxx-1234
console.log(formatPhoneNumber(phone2)); //xxx-xxx-0199
console.log(formatPhoneNumber(phone3)); //xxx-xxx-1234
console.log(formatPhoneNumber(phone4)); //xxx-xxx-4567

Answer 2

只需将输入的最后 4 个字符附加到

xxx-xxx-

:

即可满足您的所有情况

const format = (phone) => `xxx-xxx-${phone.slice(-4)}`;

console.log(format("[phone]")); // xxx-xxx-1234
console.log(format("1(800)555-0199"));// xxx-xxx-0199
console.log(format("555 555 1234")); // xxx-xxx-1234
console.log(format("9898871234567")); // xxx-xxx-4567