How to resolve warning: Can only update a mounted or mounting component for Array

[kavink]

Any thoughts on how I can resolve this ? The FieldArray field is just function. And using that in my form.

 Warning: Can only update a mounted or mounting component. This usually means you called setState, replaceState, or forceUpdate on an unmounted component. This is a no-op.

Please check the code for the ReactFinalFormFieldArray(4.2.0)(undefined) component.

[heikki]

Same problem here. I haven't been able to reproduce it in a simple example.
It happens only when there's a validation in field array field and it seems to originate from a setTimeout call here:

react-final-form-arrays/src/FieldArray.js

Line 86 in c44ad1d

setTimeout(() => this.setState({ state }))

[kavink]

@heikki Yes , it also causes performance impact as mentioned in #22

[erikras]

We might have to keep track of whether or not the component is still mounted.

[kavink]

@Erikas a small snippet on how to do Woolf be great , I’m assuming I should check for my full form or just array fields ? Thanks !

[heikki]

Great! Fix seems to work. Can we get a new release or is it waiting for something else?

[erikras]

Published fix in v1.0.4.