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Table of Contents
  • User registration
  • User authentication
  • User authorization
  • It works, but...

Building User Authentication System with JavaScript

<Browser Data StorageREST API>

In this lesson, we will use the middleware and cookies to create a user authentication system so that only authenticated users can access certain routes.

User registration

First of all, update the Prisma schema to include a password field.

prisma
1model User {
2  id       Int     @id @default(autoincrement())
3  email    String  @unique
4  name     String
5  password String
6
7  posts Post[]
8}

Apply this new schema by running the following command:

bash
1npx prisma migrate dev

Update the interface for creating new users.

views/user/new.pug

pug
1extends ../layout.pug
2
3block meta
4    name Create New User
5
6block content
7    form(id="newUser")
8        label(for="name") Name:
9        input(type="text", name="name", id="name")
10        br
11        br
12
13        label(for="email") Email:
14        input(type="email", name="email", id="email")
15        br
16        br
17
18        label(for="password") Password:
19        input(type="password", name="password", id="password")
20        br
21        br
22
23        input(type="submit", value="Submit")
24
25    script.
26        . . .
javascript
1document.addEventListener("DOMContentLoaded", function () {
2  const form = document.getElementById("newUser");
3  const nameInput = document.getElementById("name");
4  const emailInput = document.getElementById("email");
5  const passwordInput = document.getElementById("password");
6
7  const formData = new URLSearchParams();
8
9  nameInput.addEventListener("input", function () {
10    formData.set("name", nameInput.value);
11  });
12
13  emailInput.addEventListener("input", function () {
14    formData.set("email", emailInput.value);
15  });
16
17  passwordInput.addEventListener("input", function () {
18    formData.set("password", passwordInput.value);
19  });
20
21  form.addEventListener("submit", async function (event) {
22    event.preventDefault(); // Prevent the default form submission
23
24    await fetch("/users/new", {
25      method: "POST",
26      body: formData.toString(),
27      headers: {
28        "Content-Type": "application/x-www-form-urlencoded",
29      },
30    }).then((data) => (window.location.href = data.url));
31  });
32});

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<Browser Data StorageREST API>

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Course Outline
Introduction+
  • 1.WebDev Fundamentals
HTML & CSS+
  • 1.Preparations
  • 2.HTML Elements
  • 3.Query Selectors
  • 4.Colors
  • 5.Typography
  • 6.Text Customization
  • 7.Text Spacing & Alignment
  • 8.Functions & At Rules
  • 9.Links
  • 10.Lists
  • 11.Tables
  • 12.Forms
  • 13.Media Files
  • 14.The Box Model
  • 15.Display Types
  • 16.Overflow
  • 17.Object Fit
  • 18.Aspect Ratio
  • 19.Float
  • 20.Position
  • 21.The Column Layout
  • 22.The Grid Layout
  • 23.The Flexbox Layout
  • 24.Justify & Align
  • 25.Z index
  • 26.Visibility & Opacity
  • 27.Box Shadow
  • 28.Backgrounds
  • 29.Gradient
  • 30.Blend Modes
  • 31.Filters
  • 32.Transforms
  • 33.Transitions
  • 34.Animations
  • 35.Cursor & Scroll Behavior
  • 36.Responsive Design
  • 37.Responsive Media & Text
  • 38.Responsive Layout
  • 39.Best Practices
  • 40.Project #1: Recreating YouTube
  • 41.Project #2: Calculator Part 1
TailwindCSS+
  • 1.Introducing TailwindCSS
JavaScript+
  • 1.Introduction
  • 2.Setting Up a Dev Environment
  • 3.Basic Syntax
  • 4.Data Types
  • 5.Numbers & BigInt
  • 6.Strings
  • 7.Boolean Values
  • 8.Undefined & Null
  • 9.Type Conversion
  • 10.Arrays
  • 11.Objects
  • 12.Maps & Sets
  • 13.If Statements
  • 14.Switch Statements
  • 15.While Loops
  • 16.For Loops
  • 17.Functions
  • 18.Variables & Scope
  • 19.Rest Parameter & Spread Syntax
  • 20.Pure Functions
  • 21.Higher Order Functions
  • 22.Recursion
  • 23.Methods
  • 24.Constructor Functions
  • 25.Getters & Setters
  • 26.Prototypes
  • 27.The Class Notation
  • 28.Class Inheritance
  • 29.Static Properties
  • 30.Private Properties
  • 31.Object Oriented Programming
  • 32.Error Handling
  • 33.Asynchronous Programming
  • 34.Promise
  • 35.Async & Wait
  • 36.JavaScript Modules
  • 37.The DOM Tree
  • 38.Manipulation the DOM
  • 39.Event Handling
  • 40.Some Common Events
  • 41.Canvas
  • 42.Project #3: Image Slider
  • 43.Project #4: Drawing Board
  • 44.Working with Date
  • 45.The Math Object
  • 46.JSON
  • 47.Regular Expressions
  • 48.Define Patterns with Regex
  • 49.Regex Related Methods
  • 50.Project #5: Calculator Part 2
Express.js+
  • 1.Network & HTTP
  • 2.A Basic Web App
  • 3.Express.js
  • 4.Model Layer
  • 5.View Layer
  • 6.Controller Layer
  • 7.Form Handling
  • 8.Uploading Files
  • 9.Project #6: Blog
  • 10.Loading Static Files
  • 11.ORM Integration
  • 12.Adding Relations
  • 13.Middleware
  • 14.Browser Data Storage
  • 15.User Authentication
  • 16.REST API
  • 17.Best Practices
  • 18.Going to Production
React.js+
  • 1.Fundamentals
  • 2.JSX
  • 3.Conditional Rendering
  • 4.List Rendering
  • 5.Components
  • 6.Props
  • 7.Adding Styles
  • 8.Event Handling
  • 9.Introducing State
  • 10.State Management
  • 11.Form Handling
  • 12.Reducer
  • 13.Context
  • 14.Refs
  • 15.Effects
  • 16.Hooks
  • 17.Rules of React
  • 18.Project #7: Todo List
  • 19.Project #8: Weather App
  • 20.Project #9: Blog
  • 21.React.js Optimization
Next.js+
  • 1.Next.js Basics
  • 2.Routing
  • 3.Pages & Layout
  • 4.Server vs. Client Components
  • 5.API Routes
  • 6.Server Actions
  • 7.Database Integration
  • 8.Data Fetching
  • 9.Error Handling
  • 10.Middleware
  • 11.Links, Navigation & Redirection
  • 12.Images
  • 13.Scripts
  • 14.Fonts
  • 15.Lazy Loading
  • 16.Caching
  • 17.Loading UI
  • 18.Project #10: SaaS
  • 19.User Authentication
  • 20.Magic Link
  • 21.Custom Emails
  • 22.Protecting Routes
  • 23.OAuth Providers
  • 24.Dashboard
  • 25.Role Based Access Control
  • 26.Payment Integration
  • 27.Pricing Page
  • 28.Stripe Checkout
  • 29.Payment Webhook
Miscellaneous+
  • 1.Optimize Your Web App
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