Create the Signup Form

Let’s start by creating the signup form that’ll get the user’s email and password.

Add the Container

Create a new container at src/containers/Signup.js with the following.

import React, { useState } from "react";
import Form from "react-bootstrap/Form";
import { useHistory } from "react-router-dom";
import LoaderButton from "../components/LoaderButton";
import { useAppContext } from "../libs/contextLib";
import { useFormFields } from "../libs/hooksLib";
import { onError } from "../libs/errorLib";
import "./Signup.css";

export default function Signup() {
  const [fields, handleFieldChange] = useFormFields({
    email: "",
    password: "",
    confirmPassword: "",
    confirmationCode: "",
  });
  const history = useHistory();
  const [newUser, setNewUser] = useState(null);
  const { userHasAuthenticated } = useAppContext();
  const [isLoading, setIsLoading] = useState(false);

  function validateForm() {
    return (
      fields.email.length > 0 &&
      fields.password.length > 0 &&
      fields.password === fields.confirmPassword
    );
  }

  function validateConfirmationForm() {
    return fields.confirmationCode.length > 0;
  }

  async function handleSubmit(event) {
    event.preventDefault();

    setIsLoading(true);

    setNewUser("test");

    setIsLoading(false);
  }

  async function handleConfirmationSubmit(event) {
    event.preventDefault();

    setIsLoading(true);
  }

  function renderConfirmationForm() {
    return (
      <Form onSubmit={handleConfirmationSubmit}>
        <Form.Group controlId="confirmationCode" size="lg">
          <Form.Label>Confirmation Code</Form.Label>
          <Form.Control
            autoFocus
            type="tel"
            onChange={handleFieldChange}
            value={fields.confirmationCode}
          />
          <Form.Text muted>Please check your email for the code.</Form.Text>
        </Form.Group>
        <LoaderButton
          block
          size="lg"
          type="submit"
          variant="success"
          isLoading={isLoading}
          disabled={!validateConfirmationForm()}
        >
          Verify
        </LoaderButton>
      </Form>
    );
  }

  function renderForm() {
    return (
      <Form onSubmit={handleSubmit}>
        <Form.Group controlId="email" size="lg">
          <Form.Label>Email</Form.Label>
          <Form.Control
            autoFocus
            type="email"
            value={fields.email}
            onChange={handleFieldChange}
          />
        </Form.Group>
        <Form.Group controlId="password" size="lg">
          <Form.Label>Password</Form.Label>
          <Form.Control
            type="password"
            value={fields.password}
            onChange={handleFieldChange}
          />
        </Form.Group>
        <Form.Group controlId="confirmPassword" size="lg">
          <Form.Label>Confirm Password</Form.Label>
          <Form.Control
            type="password"
            onChange={handleFieldChange}
            value={fields.confirmPassword}
          />
        </Form.Group>
        <LoaderButton
          block
          size="lg"
          type="submit"
          variant="success"
          isLoading={isLoading}
          disabled={!validateForm()}
        >
          Signup
        </LoaderButton>
      </Form>
    );
  }

  return (
    <div className="Signup">
      {newUser === null ? renderForm() : renderConfirmationForm()}
    </div>
  );
}

Most of the things we are doing here are fairly straightforward but let’s go over them quickly.

1. Since we need to show the user a form to enter the confirmation code, we are conditionally rendering two forms based on if we have a user object or not.

   {newUser === null ? renderForm() : renderConfirmationForm()}
   

2. We are using the LoaderButton component that we created earlier for our submit buttons.

3. Since we have two forms we have two validation functions called validateForm and validateConfirmationForm.

4. We are setting the autoFocus flags on the email and the confirmation code fields.

   <Form.Control
     autoFocus
     type="email"
   ...
   

5. For now our handleSubmit and handleConfirmationSubmit don’t do a whole lot besides setting the isLoading state and a dummy value for the newUser state.

6. And you’ll notice we are using the useFormFields custom React Hook that we previously created to handle our form fields.

   const [fields, handleFieldChange] = useFormFields({
     email: "",
     password: "",
     confirmPassword: "",
     confirmationCode: "",
   });
   

Also, let’s add a couple of styles in src/containers/Signup.css.

@media all and (min-width: 480px) {
  .Signup {
    padding: 60px 0;
  }

  .Signup form {
    margin: 0 auto;
    max-width: 320px;
  }
}

Add the Route

Finally, add our container as a route in src/Routes.js below our login route.

<Route exact path="/signup">
  <Signup />
</Route>

And include our component in the header.

import Signup from "./containers/Signup";

Now if we switch to our browser and navigate to the signup page we should see our newly created form. Our form doesn’t do anything when we enter in our info but you can still try to fill in an email address, password, and the confirmation code. It’ll give you an idea of how the form will behave once we connect it to Cognito.

Next, let’s connect our signup form to Amazon Cognito.