电话号码和帐号的自定义格式

Question

I would like to seek advice how or what to use in formatting this two number that will be coming from JSON File.

var firstnumber = 09151234567
var secondnumber = 1075736332

First number should be shown as "0915 123 4567"

Second number should be show as "1075 7363 32"

i tried looking for codes but what i only see are formatted only with specific country. I would be implementing this in a vuejs

Answer 1

Since leading zero in a Number in javascript is ignored, you'll need to work with strings

 var firstnumber = '09151234567'; var secondnumber = '1075736332'; function modify(n) { var re1 = /^(\d{4})(\d{3})(\d{4})$/; var re2 = /^(\d{4})(\d{4})(\d\d)$/; var m = n.match(n.length == 11? re1: re2); return m && m.slice(1).join(' ') } console.log(modify(firstnumber)) console.log(modify(secondnumber))