react copy object from state

Modernize how you debug your React apps similar to updating a property directly. better for something like a form with many inputs. If it's an object, why are you spreading it into an array? What sort of strategies would a medieval military use against a fantasy giant? @JonasWilms. Components often need to change what's on the screen as a result of an interaction. The red dot is supposed to move when you touch or move the cursor over the preview area. LogRocket logs all actions and state from your Redux stores. Like said in the accepted post this will NOT work, I have an array of objects with values that are also objects, and the ONLY thing that worked properly is the accepted answer. Less alerts, way more useful signal. // These 2 variables hold the same primitive data as values. With the other approaches above, its easy to forget, and React wont warn you when you mutate state directly. In addition, please explain why you are doing it at all. But often, you will want to include existing data as a part of the new object youre creating. Since setState calls are batched, code like this leads to a bug: If you want to run code after a setState call has completed, use the callback form of setState: I admire the simplicity and light weight of option #2 above: Object spread. Using the State Hook - React React.js - Having trouble creating a new invoice within my project, Uncaught TypeError: Cannot assign to read only property 'amount' of object '#