Window is not defined nextjs typescript

Hello everyone, in this post we will look at how to solve Window Is Not Defined Next Js in programming.

if (typeof window !== 'undefined') {
  // You now have access to `window`
}

There are many ways to solve the same problem Window Is Not Defined Next Js. The other solutions are explored below.

if (typeof window !== 'undefined') {
  // Boom
}

var currentUrl = '';
  if (typeof window !== 'undefined') {
    currentUrl = window.location.href;
  }
  if (typeof window !== 'undefined') {
    window.onload = function afterWebPageLoad() {

      setLoading(false);
    }
  }
  setTimeout(function () {
    setLoading(false);
  }, 30000);

We have demonstrated, with a plethora of illustrative examples, how to tackle the Window Is Not Defined Next Js problem.

Why window is not defined in next JS?

The root cause of the error Next. js is compiled/built on Node. js runtime and Node. js does not have the the window object.22-Feb-2022

How do you fix window is not defined?

To solve the “ReferenceError: window is not defined” error, make sure to only use the window global variable on the browser. The variable represents a window containing a DOM document and can’t be used on the server side (e.g. in Node. js). If you need to define global variables in Node.25-Jul-2022

Can you use window in NextJS?

NextJS is a framework that allows you to build Static and Server Side Rendered Apps. It uses NodeJS to render your application and window is not defined in NodeJS. That means that we need to be careful that our code that accesses the window object is not run in NodeJS.27-Jun-2020

Is window available in React?

React is a client side library which means you can access everything you’re familiar with on the web including document and window .24-Jan-2022

What is window in Nextjs?

Next. js is universal, which means it executes code first server-side, then client-side. The window object is only present client-side, so if you absolutely need to have access to it in some React component, you should put that code in componentDidMount.

Can we use componentDidMount in Nextjs?

componentDidMount can only work in class component. from the image it’s shown that About is functional component. A little note you might want to consider, is using the _app. js component.19-Feb-2020

What is window in JavaScript?

A global variable, window , representing the window in which the script is running, is exposed to JavaScript code. The Window interface is home to a variety of functions, namespaces, objects, and constructors which are not necessarily directly associated with the concept of a user interface window.5 days ago

How install next JS NPM?

Automatic Setup Run npm run dev or yarn dev or pnpm dev to start the development server on http://localhost:3000. Visit http://localhost:3000 to view your application. Edit pages/index.js and see the updated result in your browser.

How do I run a Nextjs build locally?

Next. js – Deployment

• Prepare Build. Run the following command to prepare production ready build −. npm run build > [email protected]
• Start the server. Run the following command to start production server −.
• Verify Output. Open localhost:3000/api/user in a browser and you will see the following output.

Does Nextjs need a server?

You don’t need a node server running 24/7 for hosting your application. Also, if you don’t use getServerSideProps, Next. js by default will pre-render your page, this page gets cached on a CDN. So yes you can make API calls to your PHP backend, without the need for a setting up a nodejs server yourself.21-Apr-2020

The solution to Next Js Window Is Not Defined Solution will be demonstrated using examples in this article.

var currentUrl = '';
  if (typeof window !== 'undefined') {
    currentUrl = window.location.href;
  }
  if (typeof window !== 'undefined') {
    window.onload = function afterWebPageLoad() {

      setLoading(false);
    }
  }
  setTimeout(function () {
    setLoading(false);
  }, 30000);

By examining a variety of different samples, we were able to resolve the issue with the Next Js Window Is Not Defined Solution directive that was included.

Today I would like to talk about the most common error that NextJS programmers come across: window is not defined. If you have worked with NextJS for a day, or for a year, chances are you have seen this error. It might seem silly, but I have seen experienced programmers confused by this error.

If you write code like this in your NextJS app, it will fail with the error window is not defined.

const width = window.innerWidth;

NextJS is a framework that allows you to build Static and Server Side Rendered Apps. It uses NodeJS to render your application and window is not defined in NodeJS. That means that we need to be careful that our code that accesses the window object is not run in NodeJS.

Luckily for us, there are three easy solutions to using window in our NextJS apps.

1. Use the useEffect hook

With this approach, we only access the window object when we are inside of a useEffect hook. This ensures that our code only runs on the client-side. The following example shows an image component that is the same width as the viewport. To do this, we use a combination of useState and useEffect to safely get and store the

const isBrowser = () => typeof window !== "undefined"

2. Check the environment

Our second approach is simple. Before accessing the window object, we check that it is defined. This way we can be sure that our code will only run under the context of a web browser.

The following example shows this by only accessing the

const isBrowser = () => typeof window !== "undefined"

If you find yourself writing this conditional all over your application, it might make sense to move it to a utility module.

const isBrowser = () => typeof window !== "undefined"

That way you can use the function

const isBrowser = () => typeof window !== "undefined"

3. Use dynamic imports

Our third solution is useful if we want to use third-party libraries that access the window object. If you stumbled across window is not defined after trying to add a third-party module to your application, this is your best bet.

Our final example uses dynamic imports to import our previously defined Image component. Notice how we pass the parameter

const isBrowser = () => typeof window !== "undefined"

For more information on dynamic imports, check the official NextJS documentation.

That’s all for now! I hope this has cleared up some confusion about the most common NextJS error out there. Let us know in the comments if you have experienced this error in your applications!

How do I fix this window is not defined in NextJS?

Is window always defined in useEffect?

How do you fix ReferenceError window is not defined?

How do I install NextJS on Windows?