<div class="scl-toast-btn-wrapper">
    <div class="scl-toast-btn">tost btn</div>
</div>
<div class="scl-toast-wrapper left">This is a toast</div>

<script>
const sclToastBtn = document.querySelector(".scl-toast-btn");

sclToastBtn.addEventListener("click", sclToast);

function sclToast() {
	document.querySelector(".scl-toast-wrapper").style.display = "flex";
	setTimeout(disappear, 3000);
	function disappear() {
		document.querySelector(".scl-toast-wrapper").style.display = "none";
	}
}
</script>