Without Class Properties.js

export default class MyContainer extends Component {
  contructor (props) {
    super(props)
    
    this.classPropertyA = 'something'
    this.classPropertyB = 123
    
    this.state = {
      stateItemA: undefined,
      stateItemB: 'default string'
    }
    
    this.someMethod = this.someMethod.bind(this)
    this.anotherMethod = this.anotherMethod.bind(this)
  }
  
  someMethod () {
    // ...
  }
  
  anotherMethod () {
    // ...
  }
  
  render () {
    return (
      <SomeComponent />
    )
  }
}