JavaScript Arabic character to Persian (تبدیل حروف عربی به فارسی)

JavaScript Arabic character to Persian

String.prototype.replaceAll = function(search, replacement) {
        var target = this;
        return target.replace(new RegExp(search, 'g'), replacement);
    };

String.prototype.toPersianCharacter =  function () {
    var string = this;
    var obj = {
        'ك' :'ک',
        'دِ': 'د',
        'بِ': 'ب',
        'زِ': 'ز',
        'ذِ': 'ذ',
        'شِ': 'ش',
        'سِ': 'س',
        'ى' :'ی',
        'ي' :'ی',
        '١' :'۱',
        '٢' :'۲',
        '٣' :'۳',
        '٤' :'۴',
        '٥' :'۵',
        '٦' :'۶',
        '٧' :'۷',
        '٨' :'۸',
        '٩' :'۹',
        '٠' :'۰',
    };

    Object.keys(obj).forEach(function(key) {
        string = string.replaceAll(key, obj[key]);
    });
    return string
};
    
/**
* Example
*/

var string = 'ك ٤ ٦٦';
string  =  string.toPersianCharacter();
console.log(string); //out put "ک ۴ ۶۶"

Thanks Amir,
This is equivalent to code, in typescript:

export {};

declare global {
  interface String {
    replaceAll(
      search: string,
      replacement: string | ((substring: string, ...args: any[]) => string),
    ): string;
    toPersianCharacter(): string;
    toArabicCharacter(): string;
  }
}

String.prototype.replaceAll = function (
  search: string,
  replacement: string | ((substring: string, ...args: any[]) => string),
): string {
  return this.replace(new RegExp(search, 'g'), replacement);
};

String.prototype.toPersianCharacter = function (this: string) {
  const obj: { [key: string]: string } = {
    'ك': 'ک',
    'دِ': 'د',
    'بِ': 'ب',
    'زِ': 'ز',
    'ذِ': 'ذ',
    'شِ': 'ش',
    'سِ': 'س',
    'ى': 'ی',
    'ي': 'ی',
    '١': '۱',
    '٢': '۲',
    '٣': '۳',
    '٤': '۴',
    '٥': '۵',
    '٦': '۶',
    '٧': '۷',
    '٨': '۸',
    '٩': '۹',
    '٠': '۰',
  };

  let string = this;
  Object.keys(obj).forEach(function (key) {
    string = string.replaceAll(key, obj[key]);
  });
  return string;
};

String.prototype.toArabicCharacter = function (this: string) {
  const obj: { [key: string]: string } = {
    'ک': 'ك',
    'د': 'دِ',
    'ب': 'بِ',
    'ز': 'زِ',
    'ذ': 'ذِ',
    'ش': 'شِ',
    'س': 'سِ',
    'ى': 'ی',
    'ی': 'ي',
    '۱': '١',
    '۲': '٢',
    '۳': '٣',
    '۴': '٤',
    '۵': '٥',
    '۶': '٦',
    '۷': '٧',
    '۸': '٨',
    '۹': '٩',
    '۰': '٠',
  };

  let string = this;
  Object.keys(obj).forEach(function (key) {
    string = string.replaceAll(key, obj[key]);
  });
  return string;
};

Usage:

import './char-convertor.ts'
let text: string='میلاد';
const arabic = text.toArabicCharacter();
console.log(arabic);

Thanks

const arabicToPersian = str => {
  if (!str) return str;

  const diff = {
    'ك': 'ک',
    'دِ': 'د',
    'بِ': 'ب',
    'زِ': 'ز',
    'ذِ': 'ذ',
    'شِ': 'ش',
    'سِ': 'س',
    'ى': 'ی',
    'ي': 'ی',
    'ئ': 'ی',
    '١': '۱',
    '٢': '۲',
    '٣': '۳',
    '٤': '۴',
    '٥': '۵',
    '٦': '۶',
    '٧': '۷',
    '٨': '۸',
    '٩': '۹',
    '٠': '۰',
  };

  for (const [key, value] of Object.entries(diff)) {
    str = str.replaceAll(key, value);
  }

  return str;
};