Joining a JavaScript array with a condition?

Javascript Web Development Object Oriented Programming

Following is the code to a JavaScript array with a condition in JavaScript −

Example

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result,.sample {
      font-size: 18px;
      font-weight: 500;
      color: rebeccapurple;
   }
   .result {
      color: red;
   }
</style>
</head>
<body>
<h1>Joining a JavaScript array with a condition</h1>
<div class="sample"></div>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click the above button to join the array elements that are divisible by 2.</h3>
<script>
   let BtnEle = document.querySelector(".Btn");
   let resEle = document.querySelector(".result");
   let sampleEle = document.querySelector(".sample");
   let arr = [1, 2, 3, 4, 5, 6, 7, 8, 11, 22, 33, 18];
   sampleEle.innerHTML = arr;
   let joinArr = arr.filter((el) => el % 2 == 0).join(" : ");
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = joinArr;
   });
</script>
</body>
</html>