index.browser.js:1195 Uncaught TypeError: Super expression must either be null or a function

[beijing-dentsu]

after build to show error: Uncaught TypeError: Super expression must either be null or a function.

[jakezatecky]

Hello there.

Can you provide some more context or point to a simple live example that showcases this error? You can modify and fork this sandbox page.

[bastiendonjon]

+1

[davebyrnew]

We are experiencing the same issue. In our windows environments, everything seems to work OK. When deployed to Linux with server running pm2/express, the windows browser gets this error: https://************/static/node_modules/react-checkbox-tree/lib/index.browser.js Unfortunately the server is behind a firewall, so it is not publicly accessible.

Here is the code around the error: var n, r, o; return function (e, t) { if ("function" != typeof t && null !== t) throw new TypeError("Super expression must either be null or a function"); e.prototype = Object.create(t && t.prototype, { constructor: { value: e, writable: !0, configurable: !0 } }), t && x(e, t); }(t, e), n = t, (r = [{

[bastiendonjon]

We have updated webpack and dependencies with last versions. It's fixed.

[davebyrnew]

Updating webpack and dependencies seems to work for us as well.

[kranthikiran01]

@davebyrnew and @bastiendonjon can you post your webpack and dependency versions?

[bknill]

We are having exactly same problem with a CRA built with react-app-rewired.

Something to do with the uglify version apparently.

[kranthikiran01]

downgrading to v1.5.1 resolved my issue

[vineetsagar]

Everything works fine in the dev environment. However, in a production environment, I'm getting exception. Based on others answers I tried to update the webpack to the latest version, however, I'm still facing the issue. Any suggestions, what could be the possible reason?

[abhilashdkadv]

We are also facing the same issue. Anybody found any solution.

[vineetsagar]

We are also facing the same issue. Anybody found any solution. Try out this package https://www.npmjs.com/package/react-checkbox-tree-enhanced

[abhilashdkadv]

Hi @vineetsagar Thank you. Using this library it's working fine.

[CrazyDuckDuck]

We are also facing the same issue. Anybody found any solution.

Yes, I have updated webpack and webpack-cli

webpack from '4.30.0' -> '4.44.2' webpack-cli from '3.3.0' -> '3.3.12'

After that error disappeared and my application starts working in production

[abhilashdkadv]

For us we switched to the other library specified by @vineetsagar and it worked without updating webpack.

[muralimulagalapati-zz]

downgrading to v1.5.1 resolved my issue

This worked for me. If you are using Typescript, change value and label types to any

[jakezatecky]

Does not appear to be an issue with newer versions (tested with create-react-app v5.0.1).

[YogeshPrasanna]

We are also facing the same issue. Anybody found any solution. Try out this package https://www.npmjs.com/package/react-checkbox-tree-enhanced

along with this i also had to add legacy-peer-deps=true in .npmrc as we are currently using react version 18