How to verify if a JavaScript object is an array? Explain with examples.

Javascript Web Development Object Oriented Programming

The JavaScript Array.isArray() method is used to verify if a JavaScript object is an array or not based on the Boolean value returned by it.

Following is the code to verify if JavaScript object is an array −

Example

Live Demo

<!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: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Verify if a JavaScript object is array</h1>
<div class="sample"></div>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to verify if the above object is array or not
</h3>
<script>
   let sampleEle = document.querySelector(".sample");
   let resEle = document.querySelector(".result");
   let arr = [1,2,3,4,'A','B','C'];
   sampleEle.innerHTML = arr;
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = 'The above object is an array : '+Array.isArray(arr);
   });
</script>
</body>
</html>