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HTML 

              
                <div class="btn-group exchange-rates" data-toggle="buttons" data-active-class="btn-dark" aria-label="Currency for displaying prices">
	<label class="btn btn-default">
		<input type="radio" name="currency" value="GBP" data-symbol="£">GBP
	</label>
	<label class="btn btn-default">
		<input type="radio" name="currency" value="USD" data-symbol="$">USD
	</label>
	<button class="dropdown-toggle btn btn-default active" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
		<span class="symbol d-inline-block">EUR</span>
		<span class="sr-only">more currencies</span>
		<span class="caret"></span>
	</button>
   <ul class="dropdown-menu dropdown-loading dropdown-menu-right" style="height: 50vh;" aria-live="polite"></ul>
</div>

<div class="row text-center">
    <div class="col-xs-12 col-sm-4">
        <h3 class="exchange-price">€ 300</h3>
  </div>
    <div class="col-xs-12 col-sm-4">
        <h3 class="exchange-price">€ 1000</h3>
  </div>
    <div class="col-xs-12 col-sm-4">
        <h3 class="exchange-price">€ 15000</h3>
  </div>
</div>

<p><a class="btn btn-primary" href="https://www.erwinhofman.com/blog/accessible-currency-converter-including-dropdown-and-api/">Back to the article</a></p>

<script>
var symbols = {"AED":{"symbol":"AED","code":"AED","symbol_native":"\u062f.\u0625.\u200f","decimal_digits":2,"name":"United Arab Emirates Dirham"},"AFN":{"symbol":"AFN","code":"AFN","symbol_native":"\u060b","decimal_digits":0,"name":"Afghan Afghani"},"ALL":{"symbol":"ALL","code":"ALL","symbol_native":"Lek\u00eb","decimal_digits":0,"name":"Albanian Lek"},"AMD":{"symbol":"AMD","code":"AMD","symbol_native":"\u058f","decimal_digits":0,"name":"Armenian Dram"},"ANG":{"symbol":"ANG","code":"ANG","symbol_native":"NAf.","decimal_digits":2},"AOA":{"symbol":"AOA","code":"AOA","symbol_native":"Kz","decimal_digits":2},"ARS":{"symbol":"ARS","code":"ARS","symbol_native":"$","decimal_digits":2,"name":"Argentine Peso"},"AUD":{"symbol":"A$","code":"AUD","symbol_native":"$","decimal_digits":2,"name":"Australian Dollar"},"AWG":{"symbol":"AWG","code":"AWG","symbol_native":"Afl.","decimal_digits":2},"AZN":{"symbol":"AZN","code":"AZN","symbol_native":"\u20bc","decimal_digits":2,"name":"Azerbaijani Manat"},"BAM":{"symbol":"BAM","code":"BAM","symbol_native":"\u041a\u041c","decimal_digits":2,"name":"Bosnia-Herzegovina Convertible Mark"},"BBD":{"symbol":"BBD","code":"BBD","symbol_native":"$","decimal_digits":2},"BDT":{"symbol":"BDT","code":"BDT","symbol_native":"\u09f3","decimal_digits":2,"name":"Bangladeshi Taka"},"BGN":{"symbol":"BGN","code":"BGN","symbol_native":"\u043b\u0432.","decimal_digits":2,"name":"Bulgarian Lev"},"BHD":{"symbol":"BHD","code":"BHD","symbol_native":"\u062f.\u0628.\u200f","decimal_digits":3,"name":"Bahraini Dinar"},"BIF":{"symbol":"BIF","code":"BIF","symbol_native":"FBu","decimal_digits":0,"name":"Burundian Franc"},"BMD":{"symbol":"BMD","code":"BMD","symbol_native":"$","decimal_digits":2},"BND":{"symbol":"BND","code":"BND","symbol_native":"$","decimal_digits":2,"name":"Brunei Dollar"},"BOB":{"symbol":"BOB","code":"BOB","symbol_native":"Bs","decimal_digits":2,"name":"Bolivian Boliviano"},"BOV":{"symbol":"BOV","code":"BOV","symbol_native":"BOV","decimal_digits":2},"BRL":{"symbol":"R$","code":"BRL","symbol_native":"R$","decimal_digits":2,"name":"Brazilian Real"},"BSD":{"symbol":"BSD","code":"BSD","symbol_native":"$","decimal_digits":2},"BTN":{"symbol":"BTN","code":"BTN","symbol_native":"Nu.","decimal_digits":2},"BWP":{"symbol":"BWP","code":"BWP","symbol_native":"P","decimal_digits":2,"name":"Botswanan Pula"},"BYN":{"symbol":"BYN","code":"BYN","symbol_native":"Br","decimal_digits":2,"name":"Belarusian Ruble"},"BZD":{"symbol":"BZD","code":"BZD","symbol_native":"$","decimal_digits":2,"name":"Belize Dollar"},"CAD":{"symbol":"CA$","code":"CAD","symbol_native":"$","decimal_digits":2,"name":"Canadian Dollar"},"CDF":{"symbol":"CDF","code":"CDF","symbol_native":"FC","decimal_digits":2,"name":"Congolese Franc"},"CHE":{"symbol":"CHE","code":"CHE","symbol_native":"CHE","decimal_digits":2},"CHF":{"symbol":"CHF","code":"CHF","symbol_native":"CHF","decimal_digits":2,"name":"Swiss Franc"},"CHW":{"symbol":"CHW","code":"CHW","symbol_native":"CHW","decimal_digits":2},"CLF":{"symbol":"CLF","code":"CLF","symbol_native":"CLF","decimal_digits":4},"CLP":{"symbol":"CLP","code":"CLP","symbol_native":"$","decimal_digits":0,"name":"Chilean Peso"},"CNH":{"symbol":"CNH","code":"CNH","symbol_native":"CNH","decimal_digits":2},"CNY":{"symbol":"CN\u00a5","code":"CNY","symbol_native":"\u00a5","decimal_digits":2,"name":"Chinese Yuan"},"COP":{"symbol":"COP","code":"COP","symbol_native":"$","decimal_digits":0,"name":"Colombian Peso"},"COU":{"symbol":"COU","code":"COU","symbol_native":"COU","decimal_digits":2},"CRC":{"symbol":"CRC","code":"CRC","symbol_native":"\u20a1","decimal_digits":2,"name":"Costa Rican Col\u00f3n"},"CUC":{"symbol":"CUC","code":"CUC","symbol_native":"CUC","decimal_digits":2},"CUP":{"symbol":"CUP","code":"CUP","symbol_native":"$","decimal_digits":2},"CVE":{"symbol":"CVE","code":"CVE","symbol_native":"\u200b","decimal_digits":2,"name":"Cape Verdean Escudo"},"CZK":{"symbol":"CZK","code":"CZK","symbol_native":"K\u010d","decimal_digits":2,"name":"Czech Republic Koruna"},"DJF":{"symbol":"DJF","code":"DJF","symbol_native":"Fdj","decimal_digits":0,"name":"Djiboutian Franc"},"DKK":{"symbol":"DKK","code":"DKK","symbol_native":"kr.","decimal_digits":2,"name":"Danish Krone"},"DOP":{"symbol":"DOP","code":"DOP","symbol_native":"RD$","decimal_digits":2,"name":"Dominican Peso"},"DZD":{"symbol":"DZD","code":"DZD","symbol_native":"\u062f.\u062c.\u200f","decimal_digits":2,"name":"Algerian Dinar"},"EGP":{"symbol":"EGP","code":"EGP","symbol_native":"\u062c.\u0645.\u200f","decimal_digits":2,"name":"Egyptian Pound"},"ERN":{"symbol":"ERN","code":"ERN","symbol_native":"Nfk","decimal_digits":2,"name":"Eritrean Nakfa"},"ETB":{"symbol":"ETB","code":"ETB","symbol_native":"\u1265\u122d","decimal_digits":2,"name":"Ethiopian Birr"},"EUR":{"symbol":"\u20ac","code":"EUR","symbol_native":"\u20ac","decimal_digits":2,"name":"Euro"},"FJD":{"symbol":"FJD","code":"FJD","symbol_native":"$","decimal_digits":2},"FKP":{"symbol":"FKP","code":"FKP","symbol_native":"\u00a3","decimal_digits":2},"GBP":{"symbol":"\u00a3","code":"GBP","symbol_native":"\u00a3","decimal_digits":2,"name":"British Pound Sterling"},"GEL":{"symbol":"GEL","code":"GEL","symbol_native":"\u20be","decimal_digits":2,"name":"Georgian Lari"},"GHS":{"symbol":"GHS","code":"GHS","symbol_native":"GH\u20b5","decimal_digits":2,"name":"Ghanaian Cedi"},"GIP":{"symbol":"GIP","code":"GIP","symbol_native":"\u00a3","decimal_digits":2},"GMD":{"symbol":"GMD","code":"GMD","symbol_native":"D","decimal_digits":2},"GNF":{"symbol":"GNF","code":"GNF","symbol_native":"FG","decimal_digits":0,"name":"Guinean Franc"},"GTQ":{"symbol":"GTQ","code":"GTQ","symbol_native":"Q","decimal_digits":2,"name":"Guatemalan Quetzal"},"GYD":{"symbol":"GYD","code":"GYD","symbol_native":"$","decimal_digits":0},"HKD":{"symbol":"HK$","code":"HKD","symbol_native":"$","decimal_digits":2,"name":"Hong Kong Dollar"},"HNL":{"symbol":"HNL","code":"HNL","symbol_native":"L","decimal_digits":2,"name":"Honduran Lempira"},"HRK":{"symbol":"HRK","code":"HRK","symbol_native":"kn","decimal_digits":2,"name":"Croatian Kuna"},"HTG":{"symbol":"HTG","code":"HTG","symbol_native":"G","decimal_digits":2},"HUF":{"symbol":"HUF","code":"HUF","symbol_native":"Ft","decimal_digits":2,"name":"Hungarian Forint"},"IDR":{"symbol":"IDR","code":"IDR","symbol_native":"Rp","decimal_digits":0,"name":"Indonesian Rupiah"},"ILS":{"symbol":"\u20aa","code":"ILS","symbol_native":"\u20aa","decimal_digits":2,"name":"Israeli New Sheqel"},"INR":{"symbol":"\u20b9","code":"INR","symbol_native":"\u20b9","decimal_digits":2,"name":"Indian Rupee"},"IQD":{"symbol":"IQD","code":"IQD","symbol_native":"\u062f.\u0639.\u200f","decimal_digits":0,"name":"Iraqi Dinar"},"IRR":{"symbol":"IRR","code":"IRR","symbol_native":"IRR","decimal_digits":0,"name":"Iranian Rial"},"ISK":{"symbol":"ISK","code":"ISK","symbol_native":"kr","decimal_digits":0,"name":"Icelandic Kr\u00f3na"},"JMD":{"symbol":"JMD","code":"JMD","symbol_native":"$","decimal_digits":2,"name":"Jamaican Dollar"},"JOD":{"symbol":"JOD","code":"JOD","symbol_native":"\u062f.\u0623.\u200f","decimal_digits":3,"name":"Jordanian Dinar"},"JPY":{"symbol":"\u00a5","code":"JPY","symbol_native":"\uffe5","decimal_digits":0,"name":"Japanese Yen"},"KES":{"symbol":"KES","code":"KES","symbol_native":"Ksh","decimal_digits":2,"name":"Kenyan Shilling"},"KGS":{"symbol":"KGS","code":"KGS","symbol_native":"\u0441\u043e\u043c","decimal_digits":2},"KHR":{"symbol":"KHR","code":"KHR","symbol_native":"\u17db","decimal_digits":2,"name":"Cambodian Riel"},"KMF":{"symbol":"KMF","code":"KMF","symbol_native":"CF","decimal_digits":0,"name":"Comorian Franc"},"KPW":{"symbol":"KPW","code":"KPW","symbol_native":"KPW","decimal_digits":0},"KRW":{"symbol":"\u20a9","code":"KRW","symbol_native":"\u20a9","decimal_digits":0,"name":"South Korean Won"},"KWD":{"symbol":"KWD","code":"KWD","symbol_native":"\u062f.\u0643.\u200f","decimal_digits":3,"name":"Kuwaiti Dinar"},"KYD":{"symbol":"KYD","code":"KYD","symbol_native":"$","decimal_digits":2},"KZT":{"symbol":"KZT","code":"KZT","symbol_native":"\u20b8","decimal_digits":2,"name":"Kazakhstani Tenge"},"LAK":{"symbol":"LAK","code":"LAK","symbol_native":"\u20ad","decimal_digits":0},"LBP":{"symbol":"LBP","code":"LBP","symbol_native":"\u0644.\u0644.\u200f","decimal_digits":0,"name":"Lebanese Pound"},"LKR":{"symbol":"LKR","code":"LKR","symbol_native":"\u0dbb\u0dd4.","decimal_digits":2,"name":"Sri Lankan Rupee"},"LRD":{"symbol":"LRD","code":"LRD","symbol_native":"$","decimal_digits":2},"LSL":{"symbol":"LSL","code":"LSL","symbol_native":"LSL","decimal_digits":2},"LYD":{"symbol":"LYD","code":"LYD","symbol_native":"\u062f.\u0644.\u200f","decimal_digits":3,"name":"Libyan Dinar"},"MAD":{"symbol":"MAD","code":"MAD","symbol_native":"\u062f.\u0645.\u200f","decimal_digits":2,"name":"Moroccan Dirham"},"MDL":{"symbol":"MDL","code":"MDL","symbol_native":"L","decimal_digits":2,"name":"Moldovan Leu"},"MGA":{"symbol":"MGA","code":"MGA","symbol_native":"Ar","decimal_digits":0,"name":"Malagasy Ariary"},"MKD":{"symbol":"MKD","code":"MKD","symbol_native":"\u0434\u0435\u043d","decimal_digits":2,"name":"Macedonian Denar"},"MMK":{"symbol":"MMK","code":"MMK","symbol_native":"K","decimal_digits":0,"name":"Myanma Kyat"},"MNT":{"symbol":"MNT","code":"MNT","symbol_native":"\u20ae","decimal_digits":0},"MOP":{"symbol":"MOP","code":"MOP","symbol_native":"MOP$","decimal_digits":2,"name":"Macanese Pataca"},"MRO":{"symbol":"MRO","code":"MRO","symbol_native":"\u0623.\u0645.\u200f","decimal_digits":0},"MUR":{"symbol":"MUR","code":"MUR","symbol_native":"Rs","decimal_digits":0,"name":"Mauritian Rupee"},"MWK":{"symbol":"MWK","code":"MWK","symbol_native":"MK","decimal_digits":2},"MXN":{"symbol":"MX$","code":"MXN","symbol_native":"$","decimal_digits":2,"name":"Mexican Peso"},"MXV":{"symbol":"MXV","code":"MXV","symbol_native":"MXV","decimal_digits":2},"MYR":{"symbol":"MYR","code":"MYR","symbol_native":"RM","decimal_digits":2,"name":"Malaysian Ringgit"},"MZN":{"symbol":"MZN","code":"MZN","symbol_native":"MTn","decimal_digits":2,"name":"Mozambican Metical"},"NAD":{"symbol":"NAD","code":"NAD","symbol_native":"$","decimal_digits":2,"name":"Namibian Dollar"},"NGN":{"symbol":"NGN","code":"NGN","symbol_native":"\u20a6","decimal_digits":2,"name":"Nigerian Naira"},"NIO":{"symbol":"NIO","code":"NIO","symbol_native":"C$","decimal_digits":2,"name":"Nicaraguan C\u00f3rdoba"},"NOK":{"symbol":"NOK","code":"NOK","symbol_native":"kr","decimal_digits":2,"name":"Norwegian Krone"},"NPR":{"symbol":"NPR","code":"NPR","symbol_native":"\u0928\u0947\u0930\u0942","decimal_digits":2,"name":"Nepalese Rupee"},"NZD":{"symbol":"NZ$","code":"NZD","symbol_native":"$","decimal_digits":2,"name":"New Zealand Dollar"},"OMR":{"symbol":"OMR","code":"OMR","symbol_native":"\u0631.\u0639.\u200f","decimal_digits":3,"name":"Omani Rial"},"PAB":{"symbol":"PAB","code":"PAB","symbol_native":"B\/.","decimal_digits":2,"name":"Panamanian Balboa"},"PEN":{"symbol":"PEN","code":"PEN","symbol_native":"S\/","decimal_digits":2,"name":"Peruvian Nuevo Sol"},"PGK":{"symbol":"PGK","code":"PGK","symbol_native":"K","decimal_digits":2},"PHP":{"symbol":"PHP","code":"PHP","symbol_native":"\u20b1","decimal_digits":2,"name":"Philippine Peso"},"PKR":{"symbol":"PKR","code":"PKR","symbol_native":"Rs","decimal_digits":0,"name":"Pakistani Rupee"},"PLN":{"symbol":"PLN","code":"PLN","symbol_native":"z\u0142","decimal_digits":2,"name":"Polish Zloty"},"PYG":{"symbol":"PYG","code":"PYG","symbol_native":"Gs.","decimal_digits":0,"name":"Paraguayan Guarani"},"QAR":{"symbol":"QAR","code":"QAR","symbol_native":"\u0631.\u0642.\u200f","decimal_digits":2,"name":"Qatari Rial"},"RON":{"symbol":"RON","code":"RON","symbol_native":"lei","decimal_digits":2,"name":"Romanian Leu"},"RSD":{"symbol":"RSD","code":"RSD","symbol_native":"RSD","decimal_digits":0,"name":"Serbian Dinar"},"RUB":{"symbol":"RUB","code":"RUB","symbol_native":"\u20bd","decimal_digits":2,"name":"Russian Ruble"},"RWF":{"symbol":"RWF","code":"RWF","symbol_native":"RF","decimal_digits":0,"name":"Rwandan Franc"},"SAR":{"symbol":"SAR","code":"SAR","symbol_native":"\u0631.\u0633.\u200f","decimal_digits":2,"name":"Saudi Riyal"},"SBD":{"symbol":"SBD","code":"SBD","symbol_native":"$","decimal_digits":2},"SCR":{"symbol":"SCR","code":"SCR","symbol_native":"SR","decimal_digits":2},"SDG":{"symbol":"SDG","code":"SDG","symbol_native":"\u062c.\u0633.","decimal_digits":2,"name":"Sudanese Pound"},"SEK":{"symbol":"SEK","code":"SEK","symbol_native":"kr","decimal_digits":2,"name":"Swedish Krona"},"SGD":{"symbol":"SGD","code":"SGD","symbol_native":"$","decimal_digits":2,"name":"Singapore Dollar"},"SHP":{"symbol":"SHP","code":"SHP","symbol_native":"\u00a3","decimal_digits":2},"SLL":{"symbol":"SLL","code":"SLL","symbol_native":"Le","decimal_digits":0},"SOS":{"symbol":"SOS","code":"SOS","symbol_native":"S","decimal_digits":0,"name":"Somali Shilling"},"SRD":{"symbol":"SRD","code":"SRD","symbol_native":"$","decimal_digits":2},"SSP":{"symbol":"SSP","code":"SSP","symbol_native":"\u00a3","decimal_digits":2},"STN":{"symbol":"STN","code":"STN","symbol_native":"STN","decimal_digits":2},"SYP":{"symbol":"SYP","code":"SYP","symbol_native":"\u0644.\u0633.\u200f","decimal_digits":0,"name":"Syrian Pound"},"SZL":{"symbol":"SZL","code":"SZL","symbol_native":"E","decimal_digits":2},"THB":{"symbol":"THB","code":"THB","symbol_native":"฿","decimal_digits":2,"name":"Thai Baht"},"TJS":{"symbol":"TJS","code":"TJS","symbol_native":"\u0441\u043e\u043c.","decimal_digits":2},"TND":{"symbol":"TND","code":"TND","symbol_native":"\u062f.\u062a.\u200f","decimal_digits":3,"name":"Tunisian Dinar"},"TOP":{"symbol":"TOP","code":"TOP","symbol_native":"T$","decimal_digits":2,"name":"Tongan Pa\u02bbanga"},"TRY":{"symbol":"TRY","code":"TRY","symbol_native":"\u20ba","decimal_digits":2,"name":"Turkish Lira"},"TTD":{"symbol":"TTD","code":"TTD","symbol_native":"$","decimal_digits":2,"name":"Trinidad and Tobago Dollar"},"TWD":{"symbol":"NT$","code":"TWD","symbol_native":"$","decimal_digits":2,"name":"New Taiwan Dollar"},"TZS":{"symbol":"TZS","code":"TZS","symbol_native":"TSh","decimal_digits":0,"name":"Tanzanian Shilling"},"UAH":{"symbol":"UAH","code":"UAH","symbol_native":"\u20b4","decimal_digits":2,"name":"Ukrainian Hryvnia"},"UGX":{"symbol":"UGX","code":"UGX","symbol_native":"USh","decimal_digits":0,"name":"Ugandan Shilling"},"USD":{"symbol":"$","code":"USD","symbol_native":"$","decimal_digits":2,"name":"US Dollar"},"USN":{"symbol":"USN","code":"USN","symbol_native":"USN","decimal_digits":2},"UYI":{"symbol":"UYI","code":"UYI","symbol_native":"UYI","decimal_digits":0},"UYU":{"symbol":"UYU","code":"UYU","symbol_native":"$","decimal_digits":2,"name":"Uruguayan Peso"},"UZS":{"symbol":"UZS","code":"UZS","symbol_native":"\u0441\u045e\u043c","decimal_digits":0,"name":"Uzbekistan Som"},"VEF":{"symbol":"VEF","code":"VEF","symbol_native":"Bs.","decimal_digits":2,"name":"Venezuelan Bol\u00edvar"},"VND":{"symbol":"\u20ab","code":"VND","symbol_native":"\u20ab","decimal_digits":0,"name":"Vietnamese Dong"},"VUV":{"symbol":"VUV","code":"VUV","symbol_native":"VT","decimal_digits":0},"WST":{"symbol":"WST","code":"WST","symbol_native":"WS$","decimal_digits":2},"XAF":{"symbol":"FCFA","code":"XAF","symbol_native":"FCFA","decimal_digits":0,"name":"CFA Franc BEAC"},"XCD":{"symbol":"EC$","code":"XCD","symbol_native":"$","decimal_digits":2},"XOF":{"symbol":"CFA","code":"XOF","symbol_native":"CFA","decimal_digits":0,"name":"CFA Franc BCEAO"},"XPF":{"symbol":"CFPF","code":"XPF","symbol_native":"FCFP","decimal_digits":0},"YER":{"symbol":"YER","code":"YER","symbol_native":"\u0631.\u064a.\u200f","decimal_digits":0,"name":"Yemeni Rial"},"ZAR":{"symbol":"ZAR","code":"ZAR","symbol_native":"R","decimal_digits":2,"name":"South African Rand"},"ZMW":{"symbol":"ZMW","code":"ZMW","symbol_native":"K","decimal_digits":2}};
</script>
!

CSS 

              
                body {
  padding: 3rem;
}
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ml-2, .mx-2 {
    margin-left: 0.5rem !important;
}

.text-left {
  text-align: left!important;
}
.d-block {
  display: block;
}
.d-inline-block {
  display: inline-block;
}
.exchange-rates .dropdown-toggle .symbol {
  min-width: 45px; /*prevent horizontal shifts */
}
.exchange-rates li.active,
.exchange-rates .btn.active {
  box-shadow: unset;
  color: #fff;
  background-color: #000;
}

.dropdown-loading:before {
	content: "";
	display: block;
	opacity: 1!important;
	
	position: absolute;
	left: 50%;
	top: 50%;
	
	border-radius: 50%;
	width: 6em;
	height: 6em;
	margin: -3em 0 0 -3em;
	
	border: 0.6em solid rgba(127, 127, 127, 0.2);
	border-left-color: rgba(127, 127, 127, 0.5);
	
	-webkit-transform: translateZ(0);
	-ms-transform: translateZ(0);
	transform: translateZ(0);
	-webkit-animation: load8 1.1s infinite linear;
	animation: load8 1.1s infinite linear;
}
@-webkit-keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
!

JS 

              
                window.exchangeRates = {};
var exchangeDropdown = $('.exchange-rates .dropdown-menu'),
	activeClass = 'active';

$('.exchange-rates').on('change', 'input', function (e){
	var curr = $(this).val().toUpperCase(),
		symbol = $(this).attr('data-symbol');

	if ( curr in exchangeRates ) {
		return applyExchangeRates( curr, symbol, e.type );
	}
	$.getJSON('https://api.exchangeratesapi.io/latest', function (data) {
		data.rates['EUR'] 	= 1;
		exchangeRates 		= data.rates;
		applyExchangeRates( curr, symbol, e.type );
	});        
});

$('.exchange-rates').on('shown.bs.dropdown', function () {
	if ( exchangeDropdown.find('li').length == 0 ) {
		exchangeDropdown.css( {'width': $('.exchange-rates').width(), 'overflow': 'auto'} );
		$.getJSON('https://api.exchangeratesapi.io/latest', function (data) {
			data.rates['EUR'] 	= 1;
			exchangeRates 		= data.rates;			
			
			var sortObject = {};
				
			// $.getJSON('/file/js/currencymap.json', function (symbols) { // <- could be used when you've got your currencyMap in a seperate JSON file
				for (var key in exchangeRates) {
					if (!exchangeRates.hasOwnProperty(key)) continue;
					
					if ( key in symbols ) {
						// only add input-option if not yet present in default SSR list
						if ( $('.exchange-rates input[value="' + key + '"]').length == 0 ) {
							sortObject[ symbols[key].name ] = '<li><label class="btn py-1 text-truncate d-block text-left"><input type="radio" name="currency" value="' + key + '" class="sr-only" data-symbol="' + symbols[key].symbol_native + '"><small class="label btn-info pull-right pt-1 ml-2">' + symbols[key].symbol_native + '</small>' + symbols[key].name + '</label></li>';
						}
					}
				}
				
				// we want it ordered
				Object.keys(sortObject).sort().forEach(function(key) {
					var value = sortObject[key];
					delete sortObject[key];
					sortObject[key] = value;
				});
				
				for (var key in sortObject) {
					if (!sortObject.hasOwnProperty(key)) continue;
					exchangeDropdown.append( sortObject[ key ] );
				}
				// remove loading indicator
				exchangeDropdown.removeClass('dropdown-loading');
				
				// as items are newly inserted, highlight current based on lastCurrency.curr
				highlightCurrency();
				
				// move focus to active || first item (keyboard accessibility)
				var focusElm = exchangeDropdown.find('input:checked').length ? exchangeDropdown.find('input:checked'): exchangeDropdown.find('li:first-child input');
				focusElm.attr('tabindex','-1').focus();
			// }); // <- could be used when you've got your currencyMap in a seperate JSON file
		});
	}
	else {
		// move focus to active || first item (keyboard accessibility)
		var focusElm = exchangeDropdown.find('input:checked').length ? exchangeDropdown.find('input:checked'): exchangeDropdown.find('li:first-child input');
		focusElm.attr('tabindex','-1').focus();
	}
});

function highlightCurrency()
{
	if ( !lastCurrency ) {
		return;
	}
	
	var exchange = JSON.parse( lastCurrency );
	exchangeRates[ exchange.curr ] = exchange.rate;
	$('.exchange-rates .btn.' + activeClass ).removeClass( activeClass );
	
	if ( $('.exchange-rates input[value="' + exchange.curr + '"]').length ) {
		$('.exchange-rates input[value="' + exchange.curr + '"]').append('<span class="sr-only">' + exchange.name + '</span>');
		$('.exchange-rates input[value="' + exchange.curr + '"]').prop('checked', true).closest('.btn').addClass( activeClass );		
	}
	
	applyExchangeRates( exchange.curr, exchange.symbol );	
}

var lastCurrency = sessionStorage.getItem('lastCurrency');
highlightCurrency();
	
function applyExchangeRates( curr, symbol, eventType ) {
	if ( eventType == 'mouseover' || !curr ) {
		return;
	}
	
	sessionStorage.setItem('lastCurrency', JSON.stringify({
		name: $('.exchange-rates input[value="' + curr + '"] .sr-only').length ? $('.exchange-rates input[value="' + curr + '"] .sr-only').text(): '',
		symbol: symbol,
		curr: curr,
		rate: curr in exchangeRates ? exchangeRates[curr]: 1.0
	}));

	if ( $('.exchange-rates > label input[value="' + curr + '"]').length == 0 ) {
		$('.exchange-rates .dropdown-toggle').addClass( activeClass ).find('.symbol').text( curr );
	}
	
	$('.exchange-price').each( function () {
		var split = $(this).text().split(' '),
			eur = $(this).is('[data-eur]') ? parseInt( $(this).attr('data-eur') ): 0;
		for ( var i = 0; i < split.length; i++ ) {
			if ( eur == 0 && parseInt(split[i]) > 0 ) {
				eur = parseInt(split[i]);
			}
		}
		
		$(this).attr('data-eur', eur );
		$(this).text( symbol + ' ' + ( curr in exchangeRates ? Math.ceil( eur * exchangeRates[curr] ): eur ) );
	});
}
!
999px

Console