Handling Concurrent State Updates in React with useReducer - Unexpected State Behavior
This might be a silly question, but I've been struggling with this for a few days now and could really use some help. I've been struggling with this for a few days now and could really use some help... I'm encountering a problem with managing state in my React application using `useReducer`. I have a state object that tracks multiple values, and I'm trying to update the state based on asynchronous actions. However, I'm noticing that the state isn't updating as expected when multiple updates happen concurrently. Here's a simplified version of my reducer and how I'm dispatching actions: ```javascript const initialState = { count: 0, text: '' }; function reducer(state, action) { switch (action.type) { case 'increment': return { ...state, count: state.count + 1 }; case 'setText': return { ...state, text: action.payload }; default: return state; } } const MyComponent = () => { const [state, dispatch] = useReducer(reducer, initialState); const handleIncrement = async () => { for (let i = 0; i < 5; i++) { await new Promise(resolve => setTimeout(resolve, 100)); dispatch({ type: 'increment' }); } }; const handleTextChange = (newText) => { dispatch({ type: 'setText', payload: newText }); }; return ( <div> <button onClick={handleIncrement}>Increment</button> <input type='text' onChange={e => handleTextChange(e.target.value)} /> <div>Count: {state.count}, Text: {state.text}</div> </div> ); }; ``` When I click the increment button, the count increments by 5 as expected. However, when I try to change the text in the input field while the increments are happening, sometimes the text doesn't update correctly or gets overwritten by the count updates due to the asynchronous nature of the calls. Specifically, I'm sometimes seeing the `Count` value displayed correctly, but the `Text` value doesn't reflect the last update I made in the input. Is there a way to ensure that the state updates are batched correctly or handled in a way that one doesn't override the other? I'm using React 17.0.2 and I'm not certain if this behavior is related to how React handles state in concurrent scenarios. Any insights or best practices would be greatly appreciated! My development environment is Windows. Has anyone else encountered this? This is part of a larger API I'm building. Is there a better approach? I'm open to any suggestions.