sort Youtube videos by score and output top 10 into console

sort_yt_by_score.js

// NB: This is just a proof of concept, use at your own risk. You must have the videos page open for it to work.
// This helped a lot: https://javascript.info/promise-chaining

// find all chats
function parseScore(score) {
    //console.log(`parsing score ${score}`)
    var calcscore = parseFloat(score.replace('K', 'e3').replace('M', 'e6').replace(',', ''))
    //console.log(`= ${calcscore}`)
    return calcscore
}

var videos;

// Show all elements
var promise = (async function () {
    var vidcount = -1;
    while (true) {
        videos = Array.from(document.querySelectorAll('ytd-grid-video-renderer')); 
        if (vidcount == videos.length)
            break;
        vidcount = videos.length;
        videos.slice(-1)[0].scrollIntoView();
        await new Promise((resolve)=>setInterval(resolve, 1500));
    }
})()

var scores = []
var xhr = new XMLHttpRequest()
xhr.responseType = 'text'

//for (let video of document.querySelectorAll('a.ytd-thumbnail[href]')) {
promise = promise.then(function(){
for (let video of videos) {
    function processPage(resolve, reject) {
        //debugger
        var link = video.querySelector('a.ytd-thumbnail[href]')
        var views = parseScore(video.querySelector('#metadata-line span').innerText)
        var title = video.querySelector('#video-title').innerText

        xhr.open('GET', `${link.href}`)
        xhr.onload = function() {
            var dislikes, likes
            console.log(`Processing ${link.href}`)
            try {
                likes = parseScore(xhr.response.match(/([0-9.,KM]+) likes/)[1])
            } catch {
                likes = 0
            }
            try {
                dislikes = parseScore(xhr.response.match(/([0-9.,KM]+) dislikes/)[1])
            } catch {
                dislikes = 0
            }
            let approval = likes / (likes + dislikes)
            scores.push({
                title: title,
                views: views,
                url: link.href, 
                score: approval
            })
            resolve()
        }
        xhr.send()
    }
    promise = promise.then(()=>new Promise(processPage))
}})

scores.sort((e1,e2)=>{return e2.score-e1.score ? e2.score-e1.score : e2.views-e1.views})
console.log(scores.slice(0,10))