To fix the error “ReferenceError: document is not defined” in JavaScript, you can use the script tag to adjust your code. There are many reasons for this error occurring. Below are common cases and how to fix them. Let’s go into detail now.
Why does the error “ReferenceError: document is not defined” in JavaScript happen?
There are many cases where the above error occurs, but in my opinion, these are the two most common:
- Using Document Object in Node
- Using Document Object in server
The error message occurs as follows:
ReferenceError: document is not definedThis is an error that is not difficult to fix. Here’s how to solve the “ReferenceError: document is not defined” in each of the above cases.
How to fix this error?
Case 1: Using Document Object in Node
This is the more common field when we get the ReferenceError: document is not defined error.
You cannot reference the document object in Node because Node is a server-side runtime. Because we cannot use the Document Object in Node, we will get an unexpected error.
Case 2: Using Document Object in server
The above error appears when we use the Document Object too early, this is a relatively common and standard error when we encounter this error.
To solve this error, the fastest and most effective way is to put the script tag at the end of the body so that it is ready when referring to the Document.
Example:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>LearnShareIT</title>
</head>
<body>
<!-- Code HTML here -->
<script src="main.js"></script>
</body>
</html>If your Javascript code is placed on top of the body tag or above the head tag pair, when the page loads, your JS code will run before the Document is not ready, and your page will give the above error. To ensure error-free page loading, ensure that the js statement is loaded after the Documents.
You can check if your Document exists or not with the If statement condition. If the Document already exists, we can refer to it without any more errors.
Example:
if (typeof document !== "undefined") {
document.getElementById("El");
}Summary
The above are common cases of the error “ReferenceError: document is not defined” in JavaScript. I tried the above methods and it worked. To understand and implement it, please follow the article and choose the solution that suits you best. I hope this article helps you. Good luck.
My name is Tom Joseph, and I work as a software engineer. I enjoy programming and passing on my experience. C, C++, JAVA, and Python are my strong programming languages that I can share with everyone. In addition, I have also developed projects using Javascript, html, css.
Job: Developer
Name of the university: UTC
Programming Languages: C, C++, Javascript, JAVA, python, html, css
