optional.js

const quoteContainer = document.getElementById('quote-container')
const quoteText = document.getElementById('quote')
const authorText = document.getElementById('author')
const twitterBtn = document.getElementById('twitter')
const newQuoteBtn = document.getElementById('new-quote')
const loader = document.getElementById('loader');

function showLoadingSpinner() {
    loader.hidden = false;
    quoteContainer.hidden = true;
}

function completeLoadingSpinner() {
    if (!loader.hidden) {
        quoteContainer.hidden = false;
        loader.hidden = true;
    }
}

// get quote from API
async function getQuote() {
    showLoadingSpinner()
    const proxyUrl = 'https://polar-bayou-75673.herokuapp.com/'
    const apiUrl = 'http://api.forismatic.com/api/1.0/?method=getQuote&lang=en&format=json'
    try {
        const response = await fetch(proxyUrl + apiUrl)
        const data = await response.json()
        // replace missing author with unknown
        if (data.quoteAuthor === '') {
            authorText.innerText = 'Unknown'
        } else {
            authorText.innerText = data.quoteAuthor
        }
        // reduce font size for long quotes
        if (data.quoteText.length > 120) {
            quoteText.classList.add('long-quote')
        } else {
            quoteText.classList.remove('long-quote')
        }
        quoteText.innerText = data.quoteText
        completeLoadingSpinner()
    } catch (error) {
         console.log('No quote? ', error)
        getQuote()

    }
}

// tweet quote function
function tweetQuote() {
    const quote = quoteText.innerText
    const author = authorText.innerText
    const twitterUrl = `https://twitter.com/intent/tweet?text=${quote} - ${author}`
    window.open(twitterUrl, '_blank')
}

// event listeners
newQuoteBtn.addEventListener('click', getQuote)
twitterBtn.addEventListener('click', tweetQuote)

// on load
getQuote()