React: How to efficiently update an array of state objects without losing reference integrity?
I've been struggling with this for a few days now and could really use some help... I'm having trouble with I'm prototyping a solution and I'm trying to implement I'm facing a challenge in my React application where I maintain an array of objects in the component state, and I need to update a specific object's property based on user input... However, I'm concerned about maintaining the reference integrity of the objects in the array to prevent unnecessary re-renders. When I update the state using `setState`, I want to ensure that I'm modifying the correct object without creating a new reference for the entire array. Here's what I've tried: ```javascript const [items, setItems] = useState([ { id: 1, name: 'Item 1', quantity: 10 }, { id: 2, name: 'Item 2', quantity: 5 }, ]); const updateItem = (id, newQuantity) => { // This creates a new array and might lose reference integrity const updatedItems = items.map(item => item.id === id ? { ...item, quantity: newQuantity } : item ); setItems(updatedItems); }; ``` While this works, I'm concerned about performance, especially when dealing with larger arrays, since spreading the object creates a new reference for every object. I read that React can optimize re-renders if the same reference is maintained, but I'm not sure how to implement that in this scenario. Additionally, I'm using React 17.0.2. Is there a way to update the state of a specific object in an array while keeping the reference of other objects intact to avoid unnecessary re-renders? Any insights on best practices in this regard would be greatly appreciated! I'm working with Javascript in a Docker container on Windows 11. I'm developing on Linux with Javascript. This is happening in both development and production on Windows 10. Am I missing something obvious? Could someone point me to the right documentation?