Question 109448 in Json Question posted in
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How can i get value from the api json response object and assign it to constant in javascript

I’m trying to fetch the prices from coingecko API it’s returning object json response how can I get that response value and assign it to const rate directly to my calculation here the below code I’m try to achieve

fetch(`https://api.coingecko.com/api/v3/simple/price?ids=${give}&vs_currencies=${get}`)
  .then(res => res.json())
  .then((data) => {
    console.log(data.responseText)
    const rate = data.responseText;
    rateE1.innerText = `1 ${give} = ${rate} ${get}`

    get_qty_enter.value = (give_qty_enter.value * rate).toFixed(5);
  })
  .catch(err => console.error(err));
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2

Answers


  1. 0

    What error are you getting?

    You can process the data according to the field names in the incoming reply;

    //For example
var rate = data.responseText;
console.log(rate.currency, rate.amount);
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  2. 0

    You should cultivate reading the documentation while you are exploring the new tech.

    here i wrote an example for doge to usd.

    HTML

    Amount Of Coins <br>
    <input type="text" id="give_qty_enter" placeholder="give" /><br><br><br>

    Total USD for Coins <br>
    <input type="text" id="get_qty_enter" placeholder="get" />

    <button id="rateBtn">Change</button>

    <h1 id="rateE1"></h1>

    JS

        let give = "1doge";
    let get = "usd";
    let rateE1 = document.getElementById("rateE1");
    let give_qty_enter = document.getElementById("give_qty_enter");
    let get_qty_enter = document.getElementById("get_qty_enter");
    let rateBtn = document.getElementById("rateBtn");

    rateBtn.addEventListener("click", () => {
        fetch(`https://api.coingecko.com/api/v3/simple/price?ids=${give}&vs_currencies=${get}`)
            .then(res => res.json())
            .then((data) => {
                const rate = data["1doge"].usd;
                rateE1.innerText = `1 ${give.split("1")[1]} = ${rate} ${get}`

                get_qty_enter.value = (give_qty_enter.value * rate).toFixed(5);
            })
            .catch(err => console.error(err));
    });

    Read these two sections carefully on this link.
    https://www.coingecko.com/en/api/documentation

    /simple/price
    /simple/supported_vs_currencies
    /coins/list

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