JSFiddle - React, Tailwind, and code Playground

by P9Q

Babel + JSX

//English to Persian digits.
String.prototype.EntoFa= function() {
  return this.replace(/\d/g, d => '۰۱۲۳۴۵۶۷۸۹'[d])
}

//English to Arabic digits.
String.prototype.EntoAr= function() {
  return this.replace(/\d/g, d =>  '٠١٢٣٤٥٦٧٨٩'[d])
}

//Arabic to English digits.
String.prototype.ArtoEn= function() {
  return this.replace(/[\u0660-\u0669]/g, 
  	d => d.charCodeAt() - 1632)
}

//Persian to English digits.
String.prototype.PetoEn= function() {
  return this.replace(/[\u06F0-\u06F9]/g, 
  	d => d.charCodeAt() - 1776)
}

//Persian to Arabic digits.
String.prototype.PetoAr= function() {
  return this.replace(/[\u06F0-\u06F9]/g, 
  	d => '٠١٢٣٤٥٦٧٨٩'[d.charCodeAt() - 1776])
}

//Arabic to Persian digits.
String.prototype.ArtoPe= function() {
  return this.replace(/[\u0660-\u0669]/g, 
  	d => '۰۱۲۳۴۵۶۷۸۹'[d.charCodeAt() - 1632])
}

//Both Persian and Arabic to English digits.
String.prototype.IntoEn= function() {
  return this.replace(/[\u06F0-\u06F9\u0660-\u0669]/g, 
  	d => ((c=d.charCodeAt()) > 1775 ? c - 1776 : c - 1632))
}

//English to either Persian or Arabic digits.
String.prototype.EntoIn= function(e) {
  return this.replace(/\d/g, 
  	d => e ? '٠١٢٣٤٥٦٧٨٩'[d] : '۰۱۲۳۴۵۶۷۸۹'[d])
}

//English to Persian digits using unicode.
String.prototype.EntoFaUni= function() {
  return this.replace(/\d/g, d => String.fromCharCode('0x06F'+d))
}

//English to Arabic digits using unicode.
String.prototype.EntoArUni= function() {
  return this.replace(/\d/g, d => String.fromCharCode('0x066'+d))
}

//English to either Persian or Arabic digits.
String.prototype.EntoInUni= function(e) {
  return this.replace(/\d/g, d => String.fromCharCode('0x06'+(e ? '6':'F')+d))
}

//examples
let En = 'It is 30/08/2018 at 8:24 AM'
let Pe = 'It is ۳۰/۰۸/۲۰۱۹ at ۸:۲۴ AM'
let Ar = 'It is ٣٠/٠٨/٢٠١٩ at ٨:٢٤ AM'

let PeAr = 'It is ۳۰/۰۸/۲۰۱۹ at ۸:۲۴ | AM It is ٣٠/٠٨/٢٠١٩ at ٨:٢٤ AM'

//Persian <> Araibc <>...