10 August 2024

In React, appending to an object in the state involves updating the state with a new object that includes the existing properties and the new ones. This pattern ensures that you immutably update the state, preserving existing properties while adding the new key-value pair.

Source code viewer
  1. const appendToObject = (newKey, newValue) => {
  2.   setMyObject(prevState => ({
  3.     ...prevState,
  4.     [newKey]: newValue
  5. }));
  6. };
Programming Language: ECMAScript