Warning: ReactClass: You're attempting to include a mixin that is either null or not an object.

[benjarwar]

I'm getting the following error with React Native 0.55.4:

ExceptionsManager.js:71 Warning: ReactClass: You're attempting to include a mixin that is either null or not an object. Check the mixins included by the component, as well as any mixins they include themselves. Expected object but got undefined.

The culprit seems to be NativeMethodsMixin which is coming back as undefined. Is this mixin necessary?

[iyegoroff]

create-text-gradient-class.js file borrows most of its structure from Text.js. So I'm not sure if NativeMethodsMixin is necessary - it is used only because Text.js also uses it.

[benjarwar]

I did some digging, and opened a question in the React Native repo. Seems like perhaps you're not supposed to try importing that mixin from outside of the core library. I'd check to see if you're using any of the mixin's methods, and if not, consider removing it from the class.

[benjarwar]

React Native repo's bot automatically closed that ticket for not adhering to their issue templates... I suggest investigating removing the undefined mixin. Best I can tell it's not exposed by React Native.

[iyegoroff]

Looks like you are right - NativeMethodsMixin is not exported from rn and can't be used by third-party components facebook/react#12212

[iyegoroff]

Removed this warning in 0.0.9