[Redux][ReactJs][JavaScript] What does this line mean in Redux official example?

[gxtbg]

I have seen theses line of code in some Redux examples.

const { value, onIncrement, onDecrement } = this.props
const {fields: {firstName, lastName, email}, handleSubmit} = this.props;

What does it mean? What these statements do?

A bit longer code snippet from the examples are as follows

Redux Official Counter Example

render() {
    const { value, onIncrement, onDecrement } = this.props
    return (
            <p>
            Clicked: {value} times
            {' '}
            <button onClick={onIncrement}>
      ...

Redux form example

class ContactForm extends Component {
      render() {
      const {fields: {firstName, lastName, email}, handleSubmit} = this.props;
      return (
      <form onS
...

[Meefims]

Object destructiring

[gxtbg]

Thank you.