React

constructor(props, context) {
    super(props, context)

    const storedMessage = localStorage.getItem('successMessage')
    let successMessage = '';

    if (storedMessage) {
      successMessage = storedMessage
      localStorage.removeItem('successMessage')
    }

    this.state = {
      csurf: '',
      message: '',
      errors: {},
      successMessage,
      user: {
        email: '',
        password: ''
      }
    }

    this.handleChange = this.handleChange.bind(this)
  }

  handleChange(e) {
    this.setState({ user.email : e.target.value })
  }