app.js

function getExchangeData () {

    const from_currency_data = document.getElementById("from-currency").value;
    const to_currency_data = document.getElementById("to-currency").value;

    const options = {
        method: 'GET',
        headers: {
            'X-RapidAPI-Key': 'f82c097db2mshdbdc8779f68967cp10acd1jsne7a222dd3cde',
            'X-RapidAPI-Host': 'alpha-vantage.p.rapidapi.com'
        }
    };
    var URL = `https://alpha-vantage.p.rapidapi.com/query?from_currency=${from_currency_data}&function=CURRENCY_EXCHANGE_RATE&to_currency=${to_currency_data}`
    fetch(URL, options)
        .then(response => response.json())
        .then(response => displayExchangeData(response))
        .catch(err => console.error(err));
}

function displayExchangeData(response){
    const from_currency_amount_data = document.getElementById("from-currency-amount").value;
    const to_amount = document.getElementById("to-currency-amount");
    const exchange_rate = response["Realtime Currency Exchange Rate"]["5. Exchange Rate"];

    const result = eval( from_currency_amount_data * parseFloat(exchange_rate));
    to_amount.value = result;

}

function getCryptoNews(){
    const options = {
        method: 'GET',
        headers: {
            'X-RapidAPI-Key': 'f82c097db2mshdbdc8779f68967cp10acd1jsne7a222dd3cde',
            'X-RapidAPI-Host': 'crypto-news-live3.p.rapidapi.com'
        }
    };
    
    fetch('https://crypto-news-live3.p.rapidapi.com/news', options)
        .then(response => response.json())
        .then(response => displayCryptoNews(response))
        .catch(err => console.error(err));
}

function displayCryptoNews(response){
    const bestArticle = response?.slice(0, 10);
    // bestArticle.map(newsFeed(bestArticle)); 

    for(var i=0; i<bestArticle.length; i++){
        var new_anchor_tag = document.createElement('a');
        new_anchor_tag.href = bestArticle[i].url;
        new_anchor_tag.setAttribute("target", "_blank");

        var news_container = document.getElementById("news-feed");
        news_container.appendChild(new_anchor_tag);

        var new_paragraph_tag = document.createElement('p');
        new_paragraph_tag.textContent =(i+1)+": " + bestArticle[i].title;

        new_anchor_tag.appendChild(new_paragraph_tag);
    }
}

getCryptoNews();