Reactively adding to an array of objects in React

Let's now examine the reactivity of an array of objects. In this case, we will have to make any changes by accessing elements by id, which are stored inside the objects themselves.

Let's try it. Let's say we have the following array of objects:

jsxconst initNotes = [
  {
    id: 'GYi9G_uC4gBF1e2SixDvu',
    prop1: 'value11',
    prop2: 'value12',
    prop3: 'value13',
  },
  {
    id: 'IWSpfBPSV3SXgRF87uO74',
    prop1: 'value21',
    prop2: 'value22',
    prop3: 'value23',
  },
  {
    id: 'JAmjRlfQT8rLTm5tG2m1L',
    prop1: 'value31',
    prop2: 'value32',
    prop3: 'value33',
  },
];

Let's output each element of our array in a separate li tag:

jsxfunction App() {
  const [notes, setNotes] = useState(initNotes);
  
  const result = notes.map(note => {
    return <li key={note.id}>
      <span>{note.prop1}</span>
      <span>{note.prop2}</span>
      <span>{note.prop3}</span>
    </li>;
  });
  
  return <div>
    <ul>
      {result}
    </ul>
  </div>;
}