From the official doc's example:

<https://redux-toolkit.js.org/api/createSlice#the-extrareducers-builder-callback-notation>

```
import { createAction, createSlice } from '@reduxjs/toolkit'
const incrementBy = createAction<number>('incrementBy')
const decrement = createAction('decrement')

createSlice({
  name: 'counter',
  initialState: 0,
  reducers: {},
  extraReducers: (builder) => {
    builder
      .addCase(incrementBy, (state, action) => { // DO SOMETHING })
      .addCase(decrement,   (state, action) => { // DO SOMETHING })
      .addDefaultCase((state, action) => {})
  },
})

```

Also from the docs:

[![enter image description here](https://i.stack.imgur.com/Ww3N0.png)](https://i.stack.imgur.com/Ww3N0.png)

> 
> One of the key concepts of Redux is that each slice reducer "owns" its slice of state, and that many slice reducers can independently respond to the same action type. extraReducers allows createSlice to respond to other action types besides the types it has generated.
> 
> 
> 

**QUESTION**

In the example above, will the cases `incrementBy` and `decrement` also get the `counter` name as a prefix in their types?

Like:

```
"counter/incrementBy"
"counter/decrement"

```

Is this how the `extraReducers` property work?