Validate HTML Forms Without JavaScript | HTML5 Form Validation Explained
Learn how to validate HTML forms using built-in HTML5 features—no JavaScript required. This tutorial explains client vs. server-side validation, HTML5 input types, CSS pseudo-classes for styling errors, and the Constraint Validation API.
Want to validate forms without relying on JavaScript? In this video, you'll learn how to use built-in HTML5 features to perform powerful client-side form validation with minimal code.
We cover:
How HTML5 handles validation with native input types and attributes
The differences between client and server-side validation
Styling form validation states using CSS pseudo-classes like :valid, :invalid, and :required
How to enhance native validation using the Constraint Validation API
Best practices to create accessible, user-friendly form validation
Whether you're building login forms, registration pages, or simple inputs, this tutorial will show you how to write clean, modern, and efficient form validation logic in plain HTML.
Timestamps:
Finally it will go over best practices to follow for input validation in general.
00:00 Introduction
01:11 Validation support in HTML5
02:27 Scope of concepts covered in video
03:22 Client vs server side validation
04:58 HTML5 input validation capabilities
05:57 Input validation via 'required' attribute
06:38 Input validation via mix-length/max-length attributes
07:18 Input validation via mix/max attributes for numeric controls
07:58 Input validation typed input controls
09:00 Input validation via pattern attribute
12:05 CSS and introduction to HTML5 pseudo classes for validation
13:12 Required and optional pseudo classes in HTML5
14:00 In-range and out-of-range pseudo classes in HTML5
14:56 Valid and invalid pseudo classes in HTML5
18:00 HTML5 styling strategies for input validation
20:16 HTML5 Constraint validation API
22:22 Conclusion
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Link to article on how to style errors on invalid required input fields: https://daverupert.com/2017/11/happie...
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