Why am I getting undefined as an answer when fetching data from an currency exchange API?

Question

I am trying to fetch the exchange rate of one currency so that I can use it in my conversion.

currenycodes = new Array("USD", "EUR", "INR", "JPY", "RUB", "GBP", "CAD", "MXN", "CNY", "KRW", "BTC", "ETH");

This is the codes array from which I find the code which the user wants as the base (the user enters the code and I find its index in the array).

var sourcecode = currenycodes[sourceIndex];
var targetcode = currenycodes[targetIndex];

After I find the codes the user wants to exchange between (supposed USD to EUR). I feed these codes to the API.

var url = `https://v6.exchangerate-api.com/v6/c698605f2b9ef5f1ef716047/latest/${sourcecode}`;

    async function currency() {
            let res = await fetch(url);
            let data = await res.json();
            let val=data.conversion_rates.targetcode;
            console.log(val)
        // console.log(data.conversion_rates.EUR);
    }

Here conversion* rate is an array of key:value pairs e.g.: {USD: 1, AED: 3.6725, AFN: 85.8224, ALL: 97.9119*}

I need that value for the further conversion process, but I am getting undefined for some reason where the good data.conversion_rates.EUR gives perfect value.

Any help would be greatly appreciated, I can't do this alone.

@Daedalus I was taught await doesn't work unless the function is async — Zethyst, Jun 22 '23 at 21:28
@Daedalus no bro, is there any chance the problem is with variable 'targetcode' which is a string I am trying to attach to a response's data? — Zethyst, Jun 22 '23 at 21:33
`I need that value for the further conversion process, but I am getting undefined for some reason where the good data.conversion_rates.EUR gives perfect value.`: This is IMHO a duplicate to [Accessing an object property with a dynamically-computed name](https://stackoverflow.com/questions/4244896/accessing-an-object-property-with-a-dynamically-computed-name): `let val=data.conversion_rates[targetcode]`. If you agree with that @Zethyst I'll close it as duplicate. — t.niese, Jun 22 '23 at 21:36
@Daedalus THANKS!! data.conversion_rates[targetcode] worked just fine. — Zethyst, Jun 22 '23 at 21:40
@t.niese THANKSSS MAN. Because of you, my project got completed! https://scalemate.vercel.app/ — Zethyst, Jun 22 '23 at 23:20

Why am I getting undefined as an answer when fetching data from an currency exchange API?

0 Answers0