show or hide a div using javascript code example

Example 1: html button that hide and show

<button onclick="toggleText()">button</button>
<p id="Myid">Text</p>
<script>
function toggleText(){
  var x = document.getElementById("Myid");
  if (x.style.display === "none") {
    x.style.display = "block";
  } else {
    x.style.display = "none";
  }
}
</script>

Example 2: toggle element javascript

document.querySelector("#test").hidden = true;
document.querySelector("#test").hidden = false;