Better than mine! (!!!!) all fields update together as you type 🤯

I use cryptocompare.com api. No reason other than when I was starting to build it I could get that one to work but not the others. Also, your question just made me realize mine is not open source (I thought I had it open, but see it's set to private). I'll make it public when I get a chance. The price code looks like this though:

// Fetch price data

$.ajax({

url: `https://min-api.cryptocompare.com/data/price?fsym=${altcoinSelected}&tsyms=${fiatSelected},BTC`,

method: "GET",

dataType: "json",

success: function(data) {

if (data.Response === "Error") {

$("#coinPrice").text("Error: Invalid symbol or API unavailable");

console.error("API Error:", data.Message);

return;

}

currentPrice = parseFloat(data[fiatSelected]) || 0;

altcoinToBtcPrice = parseFloat(data["BTC"]) || (altcoinSelected === "BTC" ? 1 : 0);

$("#coinPrice").text(currentPrice.toLocaleString("en-US", { minimumFractionDigits: 2, maximumFractionDigits: 2 }));

coinConvert(); // Recalculate on update

},

error: function(xhr, status, error) {

$("#coinPrice").text("Error: Unable to fetch prices - check connection or API");

console.error("AJAX Error:", status, error, xhr.responseText);

}

});

}