Removal of property does not have any effect

[gultyayev]

Is this a regression?

No

Description

I have a very simple store which consists of key-value pairs [key: string]: true.
I try to run update and delete one of the keys from the store. However, the store produces no changes as evident from Redux devtools and the observed state in the UI.

I have tried it with and without Immer.

this.store.update(state => {
  const newState = { ...state }; // { a: true, b: true }

  delete newState[a]

  return newState;
}

As a result newState is an object with one property b, but the state in the store is still an object with a and b despite the new state was returned.

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in

No response

Anything else?

No response

Do you want to create a pull request?

No

[racz-zsolt]

From what I know update performs a merge over the object in the store therefore the old properties won't be removed. I believe you should switch to method store.replace() that - as its name suggests - would replace the whole object. Alternatively you could try to set newState.a to an explicit undefined value.