TypeError: ‘undefined’ is not an object in JavaScript
The “TypeError: ‘undefined’ is not an object” error occurs when a property is accessed or a method is called on an undefined object. This error is shown only on safari browser.
Following is the code for TypeError − ‘undefined’ is not an object error in JavaScript −
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 {
font-size: 18px;
font-weight: 500;
color:blueviolet
}
</style>
</head>
<body>
<h1>TypeError: ‘undefined’ is not an object example</h1>
<div class="result"></div>
<br />
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to access the name property of person object</h3>
<script>
var resEle = document.querySelector('.result');
var BtnEle = document.querySelector('.Btn');
var person;
BtnEle.addEventListener('click',function(){
try{
alert(person.name);
}
catch(err){
resEle.innerHTML=err;
}
});
</script>
</body>
</html>Output
On clicking the ‘CLICK HERE’ button −
Published on 17-Jul-2020 15:19:38
