One popular library that simplifies state management and makes handling optimistic updates easier is Immer. Immer is a JavaScript library that allows you to work with immutable data by making it easy to create a new copy of a state object with desired changes.

To handle optimistic updates with Immer, follow these steps:

1. Install the Immer library in your project by running the following command:

   npm install immer
   

2. Import the produce function from Immer into your code:

   import produce from 'immer';
   

3. Set up your initial state object:

   const initialState = {
     isLoading: false,
     data: [],
   };
   

4. Create a function that handles the state update using Immer’s produce function:

   const handleOptimisticUpdate = (state, newData) => {
     return produce(state, draft => {
       draft.isLoading = true;
       draft.data.push(newData);
     });
   };
   

   In this example, we assume that newData is the updated data we want to add to the data array, and we set isLoading to true to display a loading indicator.

5. Use the handleOptimisticUpdate function to update the state:

   const updatedState = handleOptimisticUpdate(initialState, { id: 1, name: 'John' });
   

   This will create a new copy of the state object with the updates performed inside the produce block.

By using Immer’s produce function, you can easily handle optimistic updates in your application’s state. Immer simplifies the process of working with immutable data by abstracting away the complexity of creating new copies of state objects, making your code more readable and maintainable.

#Immer #OptimisticUpdates