od0201,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<button class="user-btn column-user">
ku
<span class="foto">
<img height="100" src="http://www.kenwalger.com/twitter_cards/mongodb-atlas.png">
</span>
</button>
</body>
<script>
setTimeout (() => {
document.querySelector('.column-user').firstChild.nodeValue='hi'
}, 2000);
</script>
</html>