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Login Validation & Authentication, Javascript Tutorial - #74

Published: September 17, 2021 | DevDrawer

Estimated Reading Time
2 minutes
Video Duration
40:56 minutes

In this video, we will create a form validator for a simple login page using HTML, SASS, and Vanilla JavaScript. Basically, we use JS to create classes that will validate the login variables based on our needs then we will store information in the browser for authentication.

I do not use Bootstrap, jQuery, or any other frameworks. This method can be used on local browsers, web apps, and even on your server since it is all front-end code.

00:00 Intro

01:45 Setup Folder Structure

02:45 Create Login Page

07:53 Create Login Script

28:06 Styling Our Form and Pages

29:22 Setup Authentication

31:04 Create Authenticated Page

33:01 Create Auth Script

View the sourcecode:

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Applications Used

Visual Studio Code v1.43:

Computer Hardware:

Windows 10 Pro: (Amazon)

Samsung 500GB External SSD: (Amazon)

Samsung 970 EVO Plus SSD 1TB - M.2 NVMe: (Amazon)

Rosewill Hive-750S R750W PSU: (Amazon)

Phanteks Eclipse Tempered Glass Case: (Amazon)

MSI Arsenal Gaming AMD Ryzen Motherboard: (Amazon)

MSI Gaming GeForce RTX 2060 Super 8GB: (Amazon)

LG 34UM69G-B 34-Inch 21:9 UltraWide IPS Monitor: (Amazon)

Corsair 64GB (4 x 16GB) DDR4 Memory: (Amazon)

AMD Ryzen 7 2700X Processor: (Amazon)

Dell XPS 15 9500 15.6" Laptop / Windows: (Amazon)

Lenovo ThinkPad T15 15.6" Laptop / Linux: (Amazon)


Fujifilm X-T3: (Amazon)

Fujinon XF18-55mmF2.8-4: (Amazon)


Audio Technica AT2020: (Amazon)

Blue Snowball iCE: (Amazon)


I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.