Uncaught TypeError: setting getter-only property "configureStore"

Question

Why am I getting the following error while trying to create a store with redux-toolkit?

Uncaught TypeError: setting getter-only property "configureStore"

This is my scr/store/index.js:

import { configureStore } from "@reduxjs/toolkit";
import uiSlice from "./ui-slice";

const store = configureStore = ({
  reducer: {
    ui: uiSlice.reducer
  }
})

export default store;

And this is my src/index.js

import ReactDOM from 'react-dom/client';
import { Provider } from 'react';
import './index.css';
import App from './App';
import store from './store/index';
 
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <Provider store={store}>
    <App />
  </Provider>
);

I've followed redux-toolkit documentation as I did previously in other projects and I never had this error before. Am I omitting something?

Answer 1

this line: const store = configureStore = ({
is either some new JS syntax that I don't know or a syntax error.

try this:

const store = configureStore({
reducer: {ui: uiSlice.reducer},
});