initial react state in easy way no construct

drawLeft.js

/*
*
刘明泰
mail:[email protected]
github:lazyTai
*/
import React, {Component} from 'react';

class BooksList extends Component {
    state = {
        a: 1, b: 2
    }

    render() {
        let {a, b} = this.state;
        console.log(a)
        console.log(b)
        return <div style={{backgroundColor: "#eee"}}>
            <button>left</button>
        </div>
    }
}

export default BooksList

state = {
a: 1, b: 2
}