Mobx: TypeError: Cannot redefine property: __mobxLazyInitializers

Created on 7 Jul 2016  路  3Comments  路  Source: mobxjs/mobx

I'm using mobx v2.3.4 and mobx-react v3.4.0 with React hot reloading. Whenever a React component is hot-reloaded I get the following message:

TypeError: Cannot redefine property: __mobxLazyInitializers

This only started to happen when I upgraded mobx and mobx-react. There was no issue with v2.2.2/v3.3.1. Any idea what could be causing this?

picture mdebbar

Most helpful comment

I think this error can be fixed, but in that case I am not sure that the behavior will be correct afterwards, since the HMR support for decorators is limited. Which version of react-hot-loader are you using?

A safer workaround would be to introduce the observable properties in the constructor with extendObservable instead of using decorators.

picture mweststrate on 7 Jul 2016
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All 3 comments

I think this error can be fixed, but in that case I am not sure that the behavior will be correct afterwards, since the HMR support for decorators is limited. Which version of react-hot-loader are you using?

A safer workaround would be to introduce the observable properties in the constructor with extendObservable instead of using decorators.

mweststrate picture mweststrate on 7 Jul 2016
👍2

I'm using [email protected] and [email protected] based on this boilerplate.

I thought it wasn't related to decorators because it only started happening with [email protected].

mdebbar picture mdebbar on 7 Jul 2016

This was happening to me with react native when using decorators and hot reloading. Using functions instead of decorators solved the problem.

vonovak picture vonovak on 17 Jul 2016
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