npm install --save react-json-view-compare

import ReactJsonViewCompare from 'react-json-view-compare';

const oldData = {
  name: 'super',
  age: 18,
  task: [
    { name: 'eat', time: '09:00' },
    { name: 'work', time: '10:00' },
    { name: 'sleep', time: '22:00' }
  ]
};
const newData = {
  name: 'coolapt',
  age: 20,
  task: [
    { name: 'eat', time: '09:00' },
    { name: 'work', time: '10:00' },
    { name: 'sleep', time: '23:00' },
    { name: 'running', time: '08:00' }
  ]
};
function App() {
  return <ReactJsonViewCompare oldData={oldData} newData={newData} />;
}
ReactDOM.render(<App />, document.getElementById('root'));