How to find out if an element is hidden with JavaScript?

Javascript Web Development Object Oriented Programming

To find out if an element is hidden with JavaScript, the code is as follows −

Example

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .hiddenDiv {
      width: 100%;
      padding: 20px;
      text-align: center;
      background-color: lightblue;
      margin-top: 20px;
      display: none;
      font-size: 20px;
   }
   .showBtn {
      border: none;
      padding: 15px;
      font-size: 18px;
      background-color: rgb(86, 25, 155);
      color: white;
   }
</style>
</head>
<body>
<h1>Find hidden element using JavaScript</h1>
<h2>Click on the below button to display hidden element</h2>
<button class="showBtn">Show element</button>
<div class="hiddenDiv">
This is a DIV element
</div>
<script>
   document.querySelector(".showBtn").addEventListener("click", showHidden);
   function showHidden() {
      var x = document.querySelector(".hiddenDiv");
      if (window.getComputedStyle(x).display === "none") {
         x.style.display = "block";
      }
   }
</script>
</body>
</html>