AUTH_TOKEN

Your authentication token that you acquired after a successful login.

GMAIL_EMAIL

Your email on Gmail that will be used to send confirmation emails.

OAUTH_CLIENT_ID

Your client id that we explained in the Secure Emails lesson.

OAUTH_CLIENT_SECRET

Your client's secret that we explained in the Secure Emails lesson.

OAUTH_REFRESH_TOKEN

Your refresh token that we explained in the Secure Emails lesson.

Gain insights into building robust full-stack web apps using Node.js and React. Learn server-side with Node.js, client-side with React, and deploy with Heroku.

finalfinal.tar.gz

PORT

CONFIRMATION_SECRET_KEY

CRYPTO_ALGORITHM

INITIALIZATION_VECTOR

MONGO_URI

SALT

TOKEN_SECRET_KEY

hello_world

wrong_hello_world

routes_examples

events

async

mongoose

usermodel

signup

confirmation

login

auth

props

router

react

SignupGUI

ConfirmationGUI

LoginGUI

AuthGUI

navbar

SignupPage

SignupPageGUI

ConfirmationPage

LoginPage

ux-page

home-page

UploadGUI

SpellGUI

ImageGUI

GetGUI

UpdateGUI

DeleteGUI

CRUD

Heroku

GetGUI-copy

SpellGUIV2

ImageGUIV2

CRUDV2

Node.js is a popular JavaScript runtime environment used to create server-side applications. It is an ideal tool for building robust, full-stack web applications with React.

This course is an introduction to web development leveraging these two popular technologies. You’ll learn server-side applications with Node.js and learn to add database functionality with MongoDB fitting into the Express application framework. You’ll then build a user authorization system using the JSON Web Token (JWT).

You’ll then focus on a client-side environment built with React. You’ll build a sample application to get familiar with the framework before styling the application and adding necessary user-interaction elements. You’ll wrap up by tying the frontend and backend together and deploying your web application with Heroku.

By the end of this course, you’ll be prepared to build real-world websites using the most popular JavaScript tools.

Building Full-Stack Web Applications With Node.js and React

Let’s begin by implementing the navbar, a fixed component present on all of the application screens to navigate through different routes.

> **Note:** We may refer to the [official guide](https://tailwindcss.com/docs/guides/create-react-app) if we need instructions on how to set up Tailwind CSS in React.

# Basic navbar
A basic navbar component using React and Tailwind CSS will look something like this:







// frontend/src/components/Navbar.js

import React, { useState } from "react";
import { Transition } from "@headlessui/react";

import logo from "../assets/logo.png";

const Navbar = () => {
  const [isOpen, setIsOpen] = useState(false);
  return (
    <div>
      <nav className="bg-gray-800">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex items-center justify-between h-16">
            <div className="flex items-center">
              <div className="flex-shrink-0">
                <img className="h-8 w-8" src={logo} alt="Educative" />
              </div>
              <div className="hidden md:block">
                <div className="ml-10 flex items-baseline space-x-4">
                  <a
                    href="#"
                    className=" hover:bg-gray-700 text-white px-3 py-2 rounded-md text-sm font-medium"
                  >
                    Home
                  </a>
                </div>
              </div>
            </div>
            <div className="-mr-2 flex md:hidden">
              <button
                onClick={() => setIsOpen(!isOpen)}
                type="button"
                className="bg-gray-900 inline-flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-white hover:bg-gray-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-offset-gray-800 focus:ring-white"
                aria-controls="mobile-menu"
                aria-expanded="false"
              >
                <span className="sr-only">Open main menu</span>
                {!isOpen ? (
                  <svg
                    className="block h-6 w-6"
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 24 24"
                    stroke="currentColor"
                    aria-hidden="true"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth="2"
                      d="M4 6h16M4 12h16M4 18h16"
                    />
                  </svg>
                ) : (
                  <svg
                    className="block h-6 w-6"
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 24 24"
                    stroke="currentColor"
                    ariaHidden="true"
                  >
                    <path
                      strokeLinecap="round"
                      strokeLinejoin="round"
                      strokeWidth="2"
                      d="M6 18L18 6M6 6l12 12"
                    />
                  </svg>
                )}
              </button>
            </div>
          </div>
        </div>

        <Transition
          show={isOpen}
          enter="transition ease-out duration-100 transform"
          enterFrom="opacity-0 scale-95"
          enterTo="opacity-100 scale-100"
          leave="transition ease-in duration-75 transform"
          leaveFrom="opacity-100 scale-100"
          leaveTo="opacity-0 scale-95"
        >
          {(ref) => (
            <div className="md:hidden" id="mobile-menu">
              <div ref={ref} className="px-2 pt-2 pb-3 space-y-1 sm:px-3">
                <a
                  href="#"
                  className="hover:bg-gray-700 text-white block px-3 py-2 rounded-md text-base font-medium"
                >
                  Home
                </a>
              </div>
            </div>
          )}
        </Transition>
      </nav>
    </div>
  );
};

export default Navbar;

Note that the navbar is very simple and has one link to the home page. The most important parts of the code are discussed below:

* The `Transition` is a component used by Tailwind CSS to scale the navbar on different screens—although, the mechanism that provides this component is not built-in.

* The `isOpen` is a state that alters between the navigation menu and clear icons.

* The `assets` directory is new and used to store static files like the `logo` application.

# Authentication actions

An _authenticated user_ should see the logout button in the navbar. A guest _user_ should see the login and sign-up buttons in the navbar. These buttons can be coded like this:
 

Implement the navigation bar for the whole application.

Navbar

Before You Begin

The Server-side

User Authentication with a JSON Web Token

Set up the Client-side Environment

Develop the Client-side

Business Logic

Server-side Routes

Client-side Routes

Appendix

Conclusion

Navbar