正则表达式在Javascript中重新格式化美国电话号码 [英] Regular Expression to reformat a US phone number in Javascript

问题描述

我正在寻找重新格式化（替换，而不是验证 - 有许多用于验证的参考）电话号码以便在Javascript中显示。以下是部分数据的示例：

I'm looking to reformat (replace, not validate - there are many references for validating) a phone number for display in Javascript. Here's an example of some of the data:

• 123 4567890


• [phone]


• [phone]


• 123 456 7890


• 123.456.7890


• （空白/ null）


• 1234567890

• 123 4567890
• [phone]
• [phone]
• 123 456 7890
• 123.456.7890
• (blank/null)
• 1234567890

是否容易使用正则表达式来做这个的方法？我正在寻找最好的方法来做到这一点。有更好的方法吗？

Is there an easy way to use a regular expression to do this? I'm looking for the best way to do this. Is there a better way?

我想将数字重新格式化为以下内容：[phone]

I want to reformat the number to the following: [phone]

推荐答案

假设您想要格式[phone] ：

function formatPhoneNumber(phoneNumberString) {
  var cleaned = ('' + phoneNumberString).replace(/\D/g, '')
  var match = cleaned.match(/^(\d{3})(\d{3})(\d{4})$/)
  if (match) {
    return '(' + match[1] + ') ' + match[2] + '-' + match[3]
  }
  return null
}

这是一个允许可选<$ c的版本$ c> +1 国际代码：

Here's a version that allows the optional +1 international code:

function formatPhoneNumber(phoneNumberString) {
  var cleaned = ('' + phoneNumberString).replace(/\D/g, '')
  var match = cleaned.match(/^(1|)?(\d{3})(\d{3})(\d{4})$/)
  if (match) {
    var intlCode = (match[1] ? '+1 ' : '')
    return [intlCode, '(', match[2], ') ', match[3], '-', match[4]].join('')
  }
  return null
}
formatPhoneNumber('[phone]') // => "[phone]"
formatPhoneNumber('2345678900')   // => "[phone]"

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