Realtime validation without JS

Modern Form Validation

This demonstrates form validation with immediate visual feedback, using only pure HTML & CSS, without any JavaScript.

Email (required):

Username (4-10 characters, required):

Age (12-120, required):

Below are two password input implementations:

First password field uses type="text" along with -webkit-text-security CSS to both hide and reveal password text, mimicking visibility toggling behavior using only HTML and CSS. While this is a clever pure-CSS approach, it's non-standard and may not work consistently across all browsers.
Second password field uses the standard and recommended type="password" input, with JavaScript used to toggle visibility. This ensures proper behavior, better accessibility, and broader browser support.

Password (required):

Phone Number (optional):

Product Code (required):

Website URL (optional, must be valid URL if entered):