Form Validation In JavaScript

Опубликовано: 31 Июль 2026
на канале: Dev Garg
410
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Form validation is necessary for any website having a form. In this video, I will be showing and explaining all the concepts of form validation in JavaScript with HTML and CSS... and as well as how to display a dynamic message when there is some error and a green border when there is no error. After watching this video you will be able to make a nice-looking user signup form with validation of it in any part of your project... 👍
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00:00 - 1.Intro & Demo
03:30 - 2.HTML implementation
08:17 - 2.CSS implementation
16:35 - 4.JavaScript implementation

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💻 Source Code: https://codepen.io/realdevgarg/pen/NW...

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💡Concepts Covered:
How to do complete form validation in javaScript?
How to design and style form with HTML and CSS?
How to prevent page reloading and form submission?
How to show a dynamic error when the user enters invalid input?
How to show a green border to input when there is no error ?

How to do validation of email?
How to show an error when input is blank?
How to check if the password is the same as the confirm password or not?
How to check if the password is very weak or not?
And More...

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🙏 Please Support me by ( it's free ) By Just
( LIKE 👍, SUBSCRIBE 🔔, Comment 💭 and Share... )

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🔍Find Me Here:
Twitter:   / realdevagrg  
Instagram: https://codepen.io/devgarg.uv
Facebook:   / devgarg.uv  
GitHub: https://github.com/realdevgarg
CodePen: https://codepen.io/realdevgarg

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😊 Thank You _Dev Garg


#JavaScript #DevDeal #FormValidation