How to get all unique values in a JavaScript array?

Javascript Web Development Object Oriented Programming

Following is the code for getting all unique values in a JavaScript array −

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>Get all unique values in a array</h1>
<div class="sample"></div>
<div class="result"></div>
<button class="Btn">Click here</button>
<h3>Click on the above button to remove the duplicate values from the above
array</h3>
<script>
   let resultEle = document.querySelector(".result");
   let sampleEle = document.querySelector(".sample");
   let arr = [2, 3, 4, 2, 3, 4, "A", "A", "B", "B"];
   sampleEle.innerHTML = "arr = " + arr;
   document.querySelector(".Btn").addEventListener("click", () => {
      let set1 = new Set(arr);
      resultEle.innerHTML = "arr = " + [...set1] + "<br>";
   });
</script>
</body>
</html>

Output

On clicking the ‘Click here’ button −

AmitDiwan

Published on 17-Jul-2020 07:30:19

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