I am trying to clone the following next.js react app and run it on localhost:3000

when I open localhost:3000 I get the following error

Unhandled Rejection (ReferenceError): fetch is not defined Function._callee$ ./pages/index.js:22

20 | // see 
>22 | Index.getInitialProps = async function() {
24 |   const url = '';

I have tried to research what I am doing wrong but I still can not fix my problem. Can anyone see where I am going wrong?

Cheers

I am trying to clone the following next.js react app and run it on localhost:3000

https://github./elee-ittdublin/lab6-nextjs

when I open localhost:3000 I get the following error

Unhandled Rejection (ReferenceError): fetch is not defined Function._callee$ ./pages/index.js:22

20 | // see https://nextjs/learn/basics/fetching-data-for-pages
>22 | Index.getInitialProps = async function() {
24 |   const url = 'https://api.tvmaze./search/shows?q=batman';

I have tried to research what I am doing wrong but I still can not fix my problem. Can anyone see where I am going wrong?

Cheers

• javascript
• reactjs
• next.js

• what about that answer : stackoverflow./questions/36484156/es6-fetch-is-undefined – Kevin Amiranoff Commented Nov 25, 2018 at 14:57
• thanks for the reply buddy. errors are gone although when i click on the batman links i get '404 This page could not be found.' so the fetch is not working, any idea why? – Craig P H Commented Nov 25, 2018 at 15:28
• Fetch is working. The issue you have, when you click on the batman links you are redirected to a page on your app that doesn't exist. That line is wrong <Link as={`/p/${show.id}`} href={`/post?id=${show.id}`}> – Kevin Amiranoff Commented Nov 25, 2018 at 15:43

3 Answers 3

If you go to the examples here examples and search for fetch, you will see what they are using. In the examples is node-fetch - node-fetch

fetch is a predefined method in the browser but your function works in server side, so it does not work.

There is an npm package that basically bines browser's fetch and node-fetch together, it is named isomorphic-unfetch, you can install it via the mand npm install isomorphic-unfetch.

After that use unfetch method anywhere u want to use fetch method.

PS: In the newer versions of Next.JS ( 10.0.0 and above ) you should not see this problem.

May be the package is not installed. Try installing https://www.npmjs./package/isomorphic-unfetch