Login.js

import React from "react";

export default class Login extends React.Component {
  
  state = {
     email: "",
     password: ""
  }

  //THIS IS A DIFFERENT WAY TO BIND THIS TO THE FUNCTION
  onSubmit = () => {
     alert("login succesful");
  }
  
  setValue = (e) => {
     this.setState({[e.target.name]: e.target.value});
  }
  
  render(){
    return(
      <div>
        <LoginForm onSubmit={this.onSubmit} onChange={this.setValue} ...this.state />
      </div>
    );
  }
}