ReferenceError fetch is not defined

Question

I have this error when I compile my code in node js  how can I fix it   RefernceError  fetch is not defined    This is the function I am doing  it is responsible for recovering information from a specific movie database   function getMovieTitles substr       pageNumber 1    let url    https   jsonmock hackerrank com api movies search  Title     substr     amp page     pageNumber    fetch url  then  resp    gt  resp json    then function data        let movies   data data      let totPages   data total pages      let sortArray           for let i 0  i lt movies length i             sortArray push data data i  Title              for let i 2  i lt  totPages  i                let newPage   i             let url1    https   jsonmock hackerrank com api movies search  Title     substr     amp page     newPage             fetch url1  then function response                  var contentType   response headers get  content-type                  if contentType  amp  amp  contentType indexOf  application json       -1                    return response json   then function json                        console log json     uncomment this console log to see the JSON data                    for let i 0  i lt json data length i                         sortArray push json data i  Title                                        if i  totPages console log sortArray sort                                          else                   console log  Oops  we haven t got JSON                                                        catch function error        console log error

User · Answer

You should add this import in your file  import   as fetch from  node-fetch    And then  run this code to add the node-fetch  yarn add node-fetch

User · Answer

The fetch API is not implemented in Node    You need to use an external module for that  like node-fetch    Install it in your Node application like this  npm i node-fetch --save   then put the line below at the top of the files where you are using the fetch API   const fetch   require  node-fetch

User · Answer

It seems fetch support URL scheme with  quot http quot  or  quot https quot  for CORS request  Install node fetch library npm install node-fetch  read the file and parse to json  const fs   require  fs   const readJson   filename   gt      return new Promise  resolve  reject    gt        if  filename toLowerCase   endsWith  quot  json quot            fs readFile filename   err  data    gt            if  err              reject err            return                   resolve JSON parse data                      else         reject new Error  quot Invalid filetype   lt   json gt  required  quot          return                  usage const filename    quot    data json quot  readJson filename  then data   gt  console log data   catch err   gt  console log err message

User · Answer

For those also using typescript on node-js and are getting a ReferenceError  fetch is not defined error  npm install these packages        amazon-cognito-identity-js    3 0 11       node-fetch     2 3 0    Then include   import Global   NodeJS Global  export interface GlobalWithCognitoFix extends Global       fetch  any   declare const global  GlobalWithCognitoFix  global fetch   require  node-fetch

User · Answer

This is the related github issue This bug is related to the 2 0 0 version  you can solve it by simply upgrading to version 2 1 0  You can run npm i graphql-request 2 1 0-next 1

User · Answer

If it has to be accessible with a global scope global fetch   require  quot node-fetch quot     This is a quick dirty fix  please try to eliminate this usage in production code

User · Answer

Node js hasn t implemented the fetch   method  but you can use one of the external modules of this fantastic execution environment for JavaScript   In one of the answers above   node-fetch  is cited and that s a good choice   In your project folder  the directory where you have the  js scripts  install that module with the command   npm i node-fetch --save  Then use it as a constant in the script you want to execute with Node js  something like this   const fetch   require  node-fetch

User · Answer

You have to use the isomorphic-fetch module to your Node project because of Node does not contain Fetch API yet  for fixing this problem run below command   npm install --save isomorphic-fetch es6-promise   After installation use below code in your project   import  isomorphic-fetch    Hope this answer helps you

User · Answer

You can use cross-fetch from  lquixada     Platform agnostic  browsers  node or react native   Install  npm install --save cross-fetch   Usage  With promises   import fetch from  cross-fetch      Or just  import  cross-fetch polyfill    fetch    api github com users lquixada      then res   gt        if  res status  gt   400          throw new Error  Bad response from server              return res json            then user   gt        console log user           catch err   gt        console error err           With async await   import fetch from  cross-fetch      Or just  import  cross-fetch polyfill     async      gt      try       const res   await fetch    api github com users lquixada         if  res status  gt   400          throw new Error  Bad response from server               const user   await res json         console log user       catch  err        console error err

User · Answer

Might sound silly but I simply called npm i node-fetch --save in the wrong project  Make sure you are in the correct directory

User · Answer

The following works for me in Node js 12 x  npm i node-fetch   to initialize the Dropbox instance  var Dropbox   require  quot dropbox quot   Dropbox  var dbx   new Dropbox      accessToken   lt your access token gt      fetch  require  quot node-fetch quot            to e g  upload a content  an asynchronous method used in this case   await dbx filesUpload     contents   lt your content gt     path   lt file path gt

User · Answer

Best one is Axios library for fetching  use npm i --save axios for installng and use it like fetch  just write axios instead of fetch and then get response in then

User · Answer

If you want to avoid npm install and not running in browser  you can also use nodejs https module  const https   require  https   const url    quot https   jsonmock hackerrank com api movies quot   https get url  res   gt      let data         res on  data   chunk   gt        data    chunk          res on  end        gt        data   JSON parse data       console log data           on  error   err   gt      console log err message

[javascript] ReferenceError: fetch is not defined

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