steam-export.js

const loadMoreBtn = document.getElementById('load_more_button');
const loader = document.getElementById('inventory_history_loading');
    
const exportData = () => {
    const teamSize = 5;
	const rows = [...document.querySelectorAll('#personaldata_elements_container > table > tbody > tr')];
    rows.shift(); // Remove header row.

    const matches  = rows.map((match) => {
        const meta = [...match.querySelectorAll('.csgo_scoreboard_inner_left td')].map(node => node.innerText);
        const scoreboardRight = match.querySelector('.csgo_scoreboard_inner_right');
        const statsRows = [...scoreboardRight.querySelectorAll('tr')];
        statsRows.shift(); // Remove header
        statsRows.splice(teamSize, 1); // Remove score
 
        const players = statsRows.map((player) => {
            const playerDataColumns = player.querySelectorAll('td'); 
            const playerData = player.querySelector('.linkTitle');

            return {
                id: playerData.getAttribute('href'),
                ping: playerDataColumns[1].innerText,
                kills: playerDataColumns[2].innerText,
                assists: playerDataColumns[3].innerText,
                deaths:  playerDataColumns[4].innerText,
                mvps: playerDataColumns[5].innerText,
                hsp: playerDataColumns[6].innerText,
                score: playerDataColumns[7].innerText
            };
        });

        return {
            map: meta[0],
            date: meta[1],
            wait: meta[2],
            duration: meta[3],
            score: scoreBoardRight.querySelector('.csgo_scoreboard_score').innerText,
            team1: players.splice(0, teamSize),
            team2: players
        };
    });

    const csv = 'data:text/csv;charset=utf-8,' + matches.map((match) => {
        // Export whatever...
        return [...match.team1, ...match.team2].map(player => `${player.id}\n`).join('');
 
      /*   return [
            match.date,
            match.map,
            match.score,
        ].join(',') +  '\r\n' */
    });

    var data = encodeURI(csv);
    var link = document.createElement("a");
    link.setAttribute("href", data);
    link.setAttribute("download", "csgo-data.csv");
    document.body.appendChild(link);

    link.click();
}

const interval = setInterval(() => {
    const loading = loader.style.display !== 'none';
    const loadMoreHidden = loadMoreBtn.style.display === 'none';

    if(!loading) {
        loadMoreBtn.click();
    }
    
    if(loadMoreHidden && !loading) {
        clearInterval(interval);
        exportData();
        alert('Done!')
    }
}, 500);