test.js

const countr = [
    {
      id: 1,
      name: "Afghanistan",
      value: "af"
    },
    {
      id: 2,
      name: "Åland Islands",
      value: "ax"
    },
    {
      id: 3,
      name: "Albania",
      value: "al"
    },
    {
      id: 4,
      name: "Algeria",
      value: "dz"
    },
    {
      id: 5,
      name: "American Samoa",
      value: "as"
    },
    {
      id: 6,
      name: "Andorra",
      value: "ad"
    },
    {
      id: 7,
      name: "Angola",
      value: "ao"
    },
    {
      id: 8,
      name: "Argentina",
      value: "ar"
    },
    {
      id: 9,
      name: "Armenia",
      value: "am"
    },
    {
      id: 10,
      name: "Antarctica",
      value: "aq"
    },
    {
      id: 11,
      name: "Aruba",
      value: "aw"
    },
    {
      id: 12,
      name: "Australia",
      value: "au"
    },
    {
      id: 13,
      name: "Austria",
      value: "at"
    },
    {
      id: 14,
      name: "Azerbaijan",
      value: "az"
    },
    {
      id: 15,
      name: "Bahamas",
      value: "bs"
    },
    {
      id: 16,
      name: "Bahrain",
      value: "bh"
    },
    {
      id: 17,
      name: "Bangladesh",
      value: "bd"
    },
    {
      id: 18,
      name: "Barbados",
      value: "bb"
    },
    {
      id: 19,
      name: "Belarus",
      value: "by"
    },
    {
      id: 20,
      name: "Belgium",
      value: "be"
    },
    {
      id: 21,
      name: "Belize",
      value: "bz"
    },
    {
      id: 22,
      name: "Benin",
      value: "bj"
    },
    {
      id: 23,
      name: "Bermuda",
      value: "bm"
    },
    {
      id: 24,
      name: "Bhutan",
      value: "bt"
    },
    {
      id: 25,
      name: "Bhutan",
      value: "bt"
    },
    {
      id: 26,
      name: "Bolivia",
      value: "bo"
    },
    {
      id: 27,
      name: "Bosnia and Herzegovina",
      value: "ba"
    },
    {
      id: 28,
      name: "Bosnia and Herzegovina",
      value: "ba"
    },
    {
      id: 29,
      name: "Botswana",
      value: "bw"
    },
    {
      id: 30,
      name: "Brazil",
      value: "br"
    },
    {
      id: 31,
      name: "Brazil",
      value: "br"
    },
    {
      id: 32,
      name: "Brazil",
      value: "br"
    },
    {
      id: 33,
      name: "Virgin Islands (British)",
      value: "vg"
    },
    {
      id: 34,
      name: "British Indian Ocean Territory",
      value: "io"
    },
    {
      id: 35,
      name: "Brunei Darussalam",
      value: "bn"
    },
    {
      id: 36,
      name: "Burkina Faso",
      value: "bf"
    },
    {
      id: 37,
      name: "Burundi",
      value: "bi"
    },
    {
      id: 38,
      name: "Cambodia",
      value: "kh"
    },
    {
      id: 39,
      name: "Cameroon",
      value: "cm"
    },
    {
      id: 40,
      name: "Canada",
      value: "ca"
    },
    {
      id: 41,
      name: "Cabo Verde",
      value: "cv"
    },
    {
      id: 42,
      name: "Cayman Islands",
      value: "ky"
    },
    {
      id: 43,
      name: "Central African Republic",
      value: "cf"
    },
    {
      id: 44,
      name: "Chad",
      value: "td"
    },
    {
      id: 45,
      name: "Chile",
      value: "cl"
    },
    {
      id: 46,
      name: "China",
      value: "cn"
    },
    {
      id: 47,
      name: "China",
      value: "cn"
    },
    {
      id: 48,
      name: "China",
      value: "cn"
    },
    {
      id: 49,
      name: "Hong Kong",
      value: "hk"
    },
    {
      id: 50,
      name: "Macao",
      value: "mo"
    },
    {
      id: 51,
      name: "Colombia",
      value: "co"
    },
    {
      id: 52,
      name: "Comoros",
      value: "km"
    },
    {
      id: 53,
      name: "Congo",
      value: "cg"
    },
    {
      id: 54,
      name: "Congo, Democratic Republic of the",
      value: "cd"
    },
    {
      id: 55,
      name: "Cook Islands",
      value: "ck"
    },
    {
      id: 56,
      name: "Costa Rica",
      value: "cr"
    },
    {
      id: 57,
      name: "Côte d'Ivoire",
      value: "ci"
    },
    {
      id: 58,
      name: "Croatia",
      value: "hr"
    },
    {
      id: 59,
      name: "Cuba",
      value: "cu"
    },
    {
      id: 60,
      name: "Curaçao",
      value: "cw"
    },
    {
      id: 61,
      name: "Cyprus",
      value: "cy"
    },
    {
      id: 62,
      name: "Czechia",
      value: "cz"
    },
    {
      id: 63,
      name: "Germany",
      value: "de"
    },
    {
      id: 64,
      name: "Djibouti",
      value: "dj"
    },
    {
      id: 65,
      name: "Denmark",
      value: "dk"
    },
    {
      id: 66,
      name: "Dominica",
      value: "dm"
    },
    {
      id: 67,
      name: "Dominican Republic",
      value: "do"
    },
    {
      id: 68,
      name: "Ecuador",
      value: "ec"
    },
    {
      id: 69,
      name: "Estonia",
      value: "ee"
    },
    {
      id: 70,
      name: "Egypt",
      value: "eg"
    },
    {
      id: 71,
      name: "Eritrea",
      value: "er"
    },
    {
      id: 72,
      name: "Spain",
      value: "es"
    },
    {
      id: 73,
      name: "Ethiopia",
      value: "et"
    },
    {
      id: 74,
      name: "Finland",
      value: "fi"
    },
    {
      id: 75,
      name: "Fiji",
      value: "fj"
    },
    {
      id: 76,
      name: "Falkland Islands (Malvinas)",
      value: "fk"
    },
    {
      id: 77,
      name: "Micronesia (Federated States of)",
      value: "fm"
    },
    {
      id: 78,
      name: "Faroe Islands",
      value: "fo"
    },
    {
      id: 79,
      name: "France",
      value: "fr"
    },
    {
      id: 80,
      name: "Gabon",
      value: "ga"
    },
    {
      id: 81,
      name: "Grenada",
      value: "gd"
    },
    {
      id: 82,
      name: "Georgia",
      value: "ge"
    },
    {
      id: 83,
      name: "French Guiana",
      value: "gf"
    },
    {
      id: 84,
      name: "Ghana",
      value: "gh"
    },
    {
      id: 85,
      name: "Gibraltar",
      value: "gi"
    },
    {
      id: 86,
      name: "Greenland",
      value: "gl"
    },
    {
      id: 87,
      name: "Gambia",
      value: "gm"
    },
    {
      id: 88,
      name: "Guinea",
      value: "gn"
    },
    {
      id: 89,
      name: "Equatorial Guinea",
      value: "gq"
    },
    {
      id: 90,
      name: "Greece",
      value: "gr"
    },
    {
      id: 91,
      name: "Guatemala",
      value: "gt"
    },
    {
      id: 92,
      name: "Guam",
      value: "gu"
    },
    {
      id: 93,
      name: "Guinea-Bissau",
      value: "gw"
    },
    {
      id: 94,
      name: "Guyana",
      value: "gy"
    },
    {
      id: 95,
      name: "Hong Kong",
      value: "hk"
    },
    {
      id: 96,
      name: "Honduras",
      value: "hn"
    },
    {
      id: 97,
      name: "Croatia",
      value: "hr"
    },
    {
      id: 98,
      name: "Haiti",
      value: "ht"
    },
    {
      id: 99,
      name: "Hungary",
      value: "hu"
    },
    {
      id: 100,
      name: "Indonesia",
      value: "id"
    },
    {
      id: 101,
      name: "Ireland",
      value: "ie"
    },
    {
      id: 102,
      name: "Israel",
      value: "il"
    },
    {
      id: 103,
      name: "India",
      value: "in"
    },
    {
      id: 104,
      name: "British Indian Ocean Territory",
      value: "io"
    },
    {
      id: 105,
      name: "Iraq",
      value: "iq"
    },
    {
      id: 106,
      name: "Iran (Islamic Republic of)",
      value: "ir"
    },
    {
      id: 107,
      name: "Iceland",
      value: "is"
    },
    {
      id: 108,
      name: "Italy",
      value: "it"
    },
    {
      id: 109,
      name: "Jamaica",
      value: "jm"
    },
    {
      id: 110,
      name: "Jordan",
      value: "jo"
    },
    {
      id: 111,
      name: "Japan",
      value: "jp"
    },
    {
      id: 112,
      name: "Kenya",
      value: "ke"
    },
    {
      id: 113,
      name: "Kyrgyzstan",
      value: "kg"
    },
    {
      id: 114,
      name: "Cambodia",
      value: "kh"
    },
    {
      id: 115,
      name: "Kiribati",
      value: "ki"
    },
    {
      id: 116,
      name: "Comoros",
      value: "km"
    },
    {
      id: 117,
      name: "Saint Kitts and Nevis",
      value: "kn"
    },
    {
      id: 118,
      name: "Korea (Democratic People's Republic of)",
      value: "kp"
    },
    {
      id: 119,
      name: "Korea, Republic of",
      value: "kr"
    },
    {
      id: 120,
      name: "Kuwait",
      value: "kw"
    },
    {
      id: 121,
      name: "Cayman Islands",
      value: "ky"
    },
    {
      id: 122,
      name: "Kazakhstan",
      value: "kz"
    },
    {
      id: 123,
      name: "Lao People's Democratic Republic",
      value: "la"
    },
    {
      id: 124,
      name: "Lebanon",
      value: "lb"
    },
    {
      id: 125,
      name: "Saint Lucia",
      value: "lc"
    },
    {
      id: 126,
      name: "Liechtenstein",
      value: "li"
    },
    {
      id: 127,
      name: "Sri Lanka",
      value: "lk"
    },
    {
      id: 128,
      name: "Liberia",
      value: "lr"
    },
    {
      id: 129,
      name: "Lesotho",
      value: "ls"
    },
    {
      id: 130,
      name: "Lithuania",
      value: "lt"
    },
    {
      id: 131,
      name: "Luxembourg",
      value: "lu"
    },
    {
      id: 132,
      name: "Latvia",
      value: "lv"
    },
    {
      id: 133,
      name: "Libya",
      value: "ly"
    },
    {
      id: 134,
      name: "Morocco",
      value: "ma"
    },
    {
      id: 135,
      name: "Monaco",
      value: "mc"
    },
    {
      id: 136,
      name: "Moldova, Republic of",
      value: "md"
    },
    {
      id: 137,
      name: "Montenegro",
      value: "me"
    },
    {
      id: 138,
      name: "Madagascar",
      value: "mg"
    },
    {
      id: 139,
      name: "Marshall Islands",
      value: "mh"
    },
    {
      id: 140,
      name: "North Macedonia",
      value: "mk"
    },
    {
      id: 141,
      name: "Mali",
      value: "ml"
    },
    {
      id: 142,
      name: "Myanmar",
      value: "mm"
    },
    {
      id: 143,
      name: "Mongolia",
      value: "mn"
    },
    {
      id: 144,
      name: "Macao",
      value: "mo"
    },
    {
      id: 145,
      name: "Northern Mariana Islands",
      value: "mp"
    },
    {
      id: 146,
      name: "Martinique",
      value: "mq"
    },
    {
      id: 147,
      name: "Mauritania",
      value: "mr"
    },
    {
      id: 148,
      name: "Montserrat",
      value: "ms"
    },
    {
      id: 149,
      name: "Malta",
      value: "mt"
    },
    {
      id: 150,
      name: "Mauritius",
      value: "mu"
    },
    {
      id: 151,
      name: "Maldives",
      value: "mv"
    },
    {
      id: 152,
      name: "Malawi",
      value: "mw"
    },
    {
      id: 153,
      name: "Mexico",
      value: "mx"
    },
    {
      id: 154,
      name: "Malaysia",
      value: "my"
    },
    {
      id: 155,
      name: "Mozambique",
      value: "mz"
    },
    {
      id: 156,
      name: "Namibia",
      value: "na"
    },
    {
      id: 157,
      name: "New Caledonia",
      value: "nc"
    },
    {
      id: 158,
      name: "Niger",
      value: "ne"
    },
    {
      id: 159,
      name: "Norfolk Island",
      value: "nf"
    },
    {
      id: 160,
      name: "Nigeria",
      value: "ng"
    },
    {
      id: 161,
      name: "Nicaragua",
      value: "ni"
    },
    {
      id: 162,
      name: "Netherlands",
      value: "nl"
    },
    {
      id: 163,
      name: "Norway",
      value: "no"
    },
    {
      id: 164,
      name: "Nepal",
      value: "np"
    },
    {
      id: 165,
      name: "Nauru",
      value: "nr"
    },
    {
      id: 166,
      name: "Niue",
      value: "nu"
    },
    {
      id: 167,
      name: "New Zealand",
      value: "nz"
    },
    {
      id: 168,
      name: "Oman",
      value: "om"
    },
    {
      id: 169,
      name: "Panama",
      value: "pa"
    },
    {
      id: 170,
      name: "Peru",
      value: "pe"
    },
    {
      id: 171,
      name: "French Polynesia",
      value: "pf"
    },
    {
      id: 172,
      name: "Papua New Guinea",
      value: "pg"
    },
    {
      id: 173,
      name: "Philippines",
      value: "ph"
    },
    {
      id: 174,
      name: "Pakistan",
      value: "pk"
    },
    {
      id: 175,
      name: "Poland",
      value: "pl"
    },
    {
      id: 176,
      name: "Palestine, State of",
      value: "ps"
    },
    {
      id: 177,
      name: "Portugal",
      value: "pt"
    },
    {
      id: 178,
      name: "Palau",
      value: "pw"
    },
    {
      id: 179,
      name: "Paraguay",
      value: "py"
    },
    {
      id: 180,
      name: "Qatar",
      value: "qa"
    },
    {
      id: 181,
      name: "Réunion",
      value: "re"
    },
    {
      id: 182,
      name: "Romania",
      value: "ro"
    },
    {
      id: 183,
      name: "Serbia",
      value: "rs"
    },
    {
      id: 184,
      name: "Russian Federation",
      value: "ru"
    },
    {
      id: 185,
      name: "Rwanda",
      value: "rw"
    },
    {
      id: 186,
      name: "Saudi Arabia",
      value: "sa"
    },
    {
      id: 187,
      name: "Solomon Islands",
      value: "sb"
    },
    {
      id: 188,
      name: "Seychelles",
      value: "sc"
    },
    {
      id: 189,
      name: "Sudan",
      value: "sd"
    },
    {
      id: 190,
      name: "Sweden",
      value: "se"
    },
    {
      id: 191,
      name: "Singapore",
      value: "sg"
    },
    {
      id: 192,
      name: "Saint Helena, Ascension and Tristan da Cunha",
      value: "sh"
    },
    {
      id: 193,
      name: "Slovenia",
      value: "si"
    },
    {
      id: 194,
      name: "Slovakia",
      value: "sk"
    },
    {
      id: 195,
      name: "Sierra Leone",
      value: "sl"
    },
    {
      id: 196,
      name: "San Marino",
      value: "sm"
    },
    {
      id: 197,
      name: "Senegal",
      value: "sn"
    },
    {
      id: 198,
      name: "Somalia",
      value: "so"
    },
    {
      id: 199,
      name: "Suriname",
      value: "sr"
    },
    {
      id: 200,
      name: "South Sudan",
      value: "ss"
    },
    {
      id: 201,
      name: "Sao Tome and Principe",
      value: "st"
    },
    {
      id: 202,
      name: "El Salvador",
      value: "sv"
    },
    {
      id: 203,
      name: "Sint Maarten (Dutch part)",
      value: "sx"
    },
    {
      id: 204,
      name: "Syrian Arab Republic",
      value: "sy"
    },
    {
      id: 205,
      name: "Eswatini",
      value: "sz"
    },
    {
      id: 206,
      name: "Turks and Caicos Islands",
      value: "tc"
    },
    {
      id: 207,
      name: "Chad",
      value: "td"
    },
    {
      id: 208,
      name: "Togo",
      value: "tg"
    },
    {
      id: 209,
      name: "Thailand",
      value: "th"
    },
    {
      id: 210,
      name: "Tajikistan",
      value: "tj"
    },
    {
      id: 211,
      name: "Tokelau",
      value: "tk"
    },
    {
      id: 212,
      name: "Timor-Leste",
      value: "tl"
    },
    {
      id: 213,
      name: "Turkmenistan",
      value: "tm"
    },
    {
      id: 214,
      name: "Tunisia",
      value: "tn"
    },
    {
      id: 215,
      name: "Tonga",
      value: "to"
    },
    {
      id: 216,
      name: "Turkey",
      value: "tr"
    },
    {
      id: 217,
      name: "Trinidad and Tobago",
      value: "tt"
    },
    {
      id: 218,
      name: "Tuvalu",
      value: "tv"
    },
    {
      id: 219,
      name: "Taiwan, Province of China",
      value: "tw"
    },
    {
      id: 220,
      name: "Tanzania, United Republic of",
      value: "tz"
    },
    {
      id: 221,
      name: "Ukraine",
      value: "ua"
    },
    {
      id: 222,
      name: "Uganda",
      value: "ug"
    },
    {
      id: 223,
      name: "United Kingdom of Great Britain and Northern Ireland",
      value: "gb"
    },
    {
      id: 224,
      name: "United States of America",
      value: "us"
    },
    {
      id: 225,
      name: "Uruguay",
      value: "uy"
    },
    {
      id: 226,
      name: "Uzbekistan",
      value: "uz"
    },
    {
      id: 227,
      name: "Holy See",
      value: "va"
    },
    {
      id: 228,
      name: "Saint Vincent and the Grenadines",
      value: "vc"
    },
    {
      id: 229,
      name: "Venezuela (Bolivarian Republic of)",
      value: "ve"
    },
    {
      id: 230,
      name: "Virgin Islands (British)",
      value: "vg"
    },
    {
      id: 231,
      name: "Virgin Islands (U.S.)",
      value: "vi"
    },
    {
      id: 232,
      name: "Viet Nam",
      value: "vn"
    },
    {
      id: 233,
      name: "Vanuatu",
      value: "vu"
    },
    {
      id: 234,
      name: "Wallis and Futuna",
      value: "wf"
    },
    {
      id: 235,
      name: "Samoa",
      value: "ws"
    },
    {
      id: 236,
      name: "Yemen",
      value: "ye"
    },
    {
      id: 237,
      name: "South Africa",
      value: "za"
    },
    {
      id: 238,
      name: "Zambia",
      value: "zm"
    },
    {
      id: 239,
      name: "Zimbabwe",
      value: "zw"
    }
  ]

  const newCountr = countr.reduce((unique, o) => {
        if(!unique.some(obj => obj.label === o.label && obj.value === o.value)) {
            unique.push(o);
        }
        return unique;
    },[]);

  console.log(newCountr)