what-i-learned-from-2-years-with-javascript-and-react-2.js

const someObject = {
  magicValue: 42,
};
 
const hugeObject = {
  ...someObject,
  someValue: 37,
  deepObject: {
    foo: [42, 43],
  }
}
 
const overridenObject = {
  ...hugeObject,
  someValue: 24,
  deepObject: {
    someArray: [91, 21], // foo[] will be overridden
  }
}
 
const notOverridenObject = {
  ...hugeObject,
  anotherValue: 37,
  deepObject: {
    ...hugeObject.deepObject, // extend nested object
    someArray: [42, 43],
  }
}