WebpackError: TypeError: realFetch.call is not a function

[ppatel31]

All the module used fetch have this issue

WebpackError: TypeError: realFetch.call is not a function

Describe the issue that you're seeing.

just use fetch like isomorphic-fetch

Clear steps describing how to reproduce the issue. Please link to a reproduction, this makes your issue much easier to diagnose (seriously).

How to Make a Minimal Reproduction: https://www.gatsbyjs.com/contributing/how-to-make-a-reproducible-test-case/

realFetch.call not working

What should happen?

realFetch.call not working

What happened.

System:
OS: macOS 10.15.7
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 14.13.0 - /usr/local/bin/node
Yarn: 1.22.10 - /usr/local/bin/yarn
npm: 6.14.8 - /usr/local/bin/npm
Languages:
Python: 2.7.16 - /usr/bin/python
Browsers:
Chrome: 89.0.4389.90
Edge: 89.0.774.57
Firefox: 86.0
Safari: 14.0.3
npmPackages:
gatsby: ^3.1.2 => 3.1.2
gatsby-plugin-canonical-urls: ^3.1.0 => 3.1.0
gatsby-plugin-google-tagmanager: ^3.1.0 => 3.1.0
gatsby-plugin-preconnect: ^1.2.0 => 1.2.0
gatsby-plugin-react-helmet: ^4.1.0 => 4.1.0
gatsby-plugin-remove-trailing-slashes: ^3.1.0 => 3.1.0
gatsby-plugin-robots-txt: ^1.5.5 => 1.5.5
gatsby-plugin-sitemap: ^3.1.0 => 3.1.0
gatsby-plugin-verify-bing: ^1.1.26 => 1.1.27
gatsby-remark-external-links: 0.0.4 => 0.0.4
gatsby-source-filesystem: ^3.1.0 => 3.1.0
gatsby-source-graphql: ^3.1.0 => 3.1.0
gatsby-transformer-json: ^3.1.0 => 3.1.0
gatsby-transformer-remark: ^3.1.0 => 3.1.0
npmGlobalPackages:
gatsby-cli: 3.1.0
gatsby: 2.19.41

Run gatsby info --clipboard in your project directory and paste the output here.

[LekoArts]

Please see lquixada/cross-fetch#15 & graffle-js/graffle#85 - this doesn't seem to be an issue with Gatsby