1.4.0 build causes "Uncaught TypeError: Super expression must either be null or a function, not undefined" error at runtime about dazzle HOT 4 CLOSED

A lot changed between 1.4.0 and 1.2.7 such as React 16+ and node v8+. A stack trace and other information will help us understand your issue better than just one line and exception.

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Since the build is minified there is no meaningful stack trace, and this error doesn't occur on non minified build. I understand that without a stack trace it is difficult to identify problem. I will try to give more information as much as I can.
I have identified removing following line fixes the error but I need this method to add widgets on user action. It doesn't matter whether I'm calling the method or not, it always gives this error when loading bundle if it is imported.

import {addWidget} from 'react-dazzle';

IntelliJ also highlights above statement and warns that "cannot resolve sysmbol addWidget"

here is the stack trace:
WorklogPRO_TimesheetBundle.js?locale=en-UK:32 Uncaught TypeError: Super expression must either be null or a function, not undefined at WorklogPRO_TimesheetBundle.js?locale=en-UK:32 at WorklogPRO_TimesheetBundle.js?locale=en-UK:32 at t.default (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at WorklogPRO_TimesheetBundle.js?locale=en-UK:32 at Object.e.exports (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at n (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at Object.e.exports (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at n (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at Object.e.exports (WorklogPRO_TimesheetBundle.js?locale=en-UK:32) at n (WorklogPRO_TimesheetBundle.js?locale=en-UK:32)

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@denizoguz I tried to reproduce your issue using React 16.3, Dazzle 1.4.0 and a custom addWidget on a new app created with create-react-app. However, it seems to be working fine with both minified and non-minified builds.

I also get the Intellij warning when importing addWidget, but I don't think it's related to your issue. This may be down to the way Dazzle is exporting addWidget.

The error you're getting seems to be related to class inheritance, but addWidget doesn't use any classes :/

Would you be able to push a project where the issue can be reproduced?

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@vlaurin, Thanks for trying it. You can close this issue for now. Project is huge and I don't want to attach all of it here. If I could replicate it in a small sized project, I will definitely upload it. For the time being I'm using 1.2.7. Thanks for your support.

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