Describe the bug
It seems like the build process changed and now throws an error where there previously wasn't one. In react-scripts version 4.0.3 everything works just fine, whereas in version 5.0.1 I get the error Class extends value undefined is not a constructor or null.
Did you try recovering your dependencies?
Yes, I tried multiple setups and multiple repos. The error does not seem to be npm-version dependent.
npm: 8.1.2
Which terms did you search for in User Guide?
webpack, require, setup
Environment
Environment Info:
current version of create-react-app: 5.0.1
running from C:\Users\main\AppData\Local\npm-cache_npx\c67e74de0542c87c\node_modules\create-react-app
System:
OS: Windows 10 10.0.19044
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Binaries:
Node: 16.13.1 - C:\Program Files\nodejs\node.EXE
Yarn: Not Found
npm: 8.1.2 - C:\Program Files\nodejs\npm.CMD
Browsers:
Chrome: Not Found
Edge: Spartan (44.19041.1266.0), Chromium (101.0.1210.53)
Internet Explorer: 11.0.19041.1566
npmPackages:
react: 18.0.0 => 18.0.0
react-dom: 18.0.0 => 18.0.0
react-scripts: 5.0.1 => 4.0.3
npmGlobalPackages:
create-react-app: Not Found
Steps to reproduce
my example repo
- Go to the repository that I just created for this.
- Try
npm start with the version 4.0.3 and version 5.0.1. For 5.0.1 you will get the mentioned error in the console.
- For
4.0.3 everything works as expected.
Describe the bug
It seems like the build process changed and now throws an error where there previously wasn't one. In
react-scriptsversion4.0.3everything works just fine, whereas in version5.0.1I get the errorClass extends value undefined is not a constructor or null.Did you try recovering your dependencies?
Yes, I tried multiple setups and multiple repos. The error does not seem to be npm-version dependent.
npm: 8.1.2
Which terms did you search for in User Guide?
webpack, require, setup
Environment
Environment Info:
current version of create-react-app: 5.0.1
running from C:\Users\main\AppData\Local\npm-cache_npx\c67e74de0542c87c\node_modules\create-react-app
System:
OS: Windows 10 10.0.19044
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Binaries:
Node: 16.13.1 - C:\Program Files\nodejs\node.EXE
Yarn: Not Found
npm: 8.1.2 - C:\Program Files\nodejs\npm.CMD
Browsers:
Chrome: Not Found
Edge: Spartan (44.19041.1266.0), Chromium (101.0.1210.53)
Internet Explorer: 11.0.19041.1566
npmPackages:
react: 18.0.0 => 18.0.0
react-dom: 18.0.0 => 18.0.0
react-scripts: 5.0.1 => 4.0.3
npmGlobalPackages:
create-react-app: Not Found
Steps to reproduce
my example repo
npm startwith the version4.0.3and version5.0.1. For5.0.1you will get the mentioned error in the console.4.0.3everything works as expected.