Stas1985,
Получение текущей прокрутки
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.whatsapp {
display: none;
position: fixed;
}
body{
height: 1000px;
}
.whatsapp.show {
display: block;
}
</style>
<script>
window.addEventListener( "scroll" , function() {
document.querySelector(".whatsapp").classList.toggle("show", this.pageYOffset > 200);
});
</script>
</head>
<body>
<div class="whatsapp"> whatsapp
<a href="tel:+7хххххххххх" target="_blank" id="wa_button-phone">
<div class="img-circleblock-phone" style="transform-origin: center;"></div>
</a>
<a href="https://api.whatsapp.com/send?phone=7хххххххххх&text=Здравствуйте!%20Хочу%20проконсультироваться." target="_blank" id="wa_button">
<div class="img-circleblock" style="transform-origin: center;"></div>
</a>
</div>
</body>
</html>