esl_csgo has <span id="viewers"></span> viewers
<script>
var ve = document.getElementById('viewers');
setInterval(_ => {
fetch('https://api.twitch.tv/kraken/streams/31239503', {
headers: new Headers({
'Client-Id': '',
'Accept': 'application/vnd.twitchtv.v5+json'
})
}).then(response => response.json()).then(data => {
ve.textContent = data.stream.viewers;
});
}, 10000);
</script>
For reference only, now that I’m at a computer.