Unexpected Behavior when Using JavaScript Set and Map with React State Management
Does anyone know how to I've been struggling with this for a few days now and could really use some help. I'm working on a project and hit a roadblock... I'm encountering an issue with managing state in a React component where I am trying to use a `Set` and a `Map` to handle unique values and key-value pairs. The problem arises when I attempt to update the state with a new value, but the state does not seem to reflect the expected changes. I'm using React 17.0.2 along with functional components and hooks. Here's a simplified version of my code: ```javascript import React, { useState } from 'react'; const MyComponent = () => { const [mySet, setMySet] = useState(new Set()); const [myMap, setMyMap] = useState(new Map()); const addValue = (value) => { const newSet = new Set(mySet); newSet.add(value); setMySet(newSet); const newMap = new Map(myMap); newMap.set(value, `Value for ${value}`); setMyMap(newMap); }; return ( <div> <button onClick={() => addValue('test')}>Add Value</button> <div> <h3>Set Values:</h3> {[...mySet].map((item) => <div key={item}>{item}</div>)} <h3>Map Values:</h3> {[...myMap.entries()].map(([key, value]) => <div key={key}>{key}: {value}</div>)} </div> </div> ); }; export default MyComponent; ``` The issue I'm facing is that when I click the 'Add Value' button multiple times with the same value, it correctly adds the value to the Set but does not update the Map with the new value for that key. Instead, it retains the old value. I'm getting inconsistent behavior because if I add a different value, it works as expected. However, when I try to overwrite an existing key in the Map, it doesn't seem to update visually in my component. I've verified that the `addValue` function is being called correctly, and I've even added `console.log(newMap)` before updating the state to confirm the new value is being set, yet the UI doesn't reflect this change. Is this a known limitation with how React handles state updates for complex data structures like `Set` and `Map`, or am I missing something in my approach? Any insights would be greatly appreciated! For context: I'm using Javascript on Linux. How would you solve this? This is part of a larger application I'm building. Any ideas what could be causing this? This is for a application running on Linux. Has anyone else encountered this? Any pointers in the right direction?