HTML How to Validate a Group of Checkboxes

w3schools.com

https://www.w3schools.com/html/

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

mozilla.org

https://developer.mozilla.org/en-US/docs/Web/HTML

HTML: HyperText Markup Language - MDN

HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally used to describe a web page's appearance/presentation (CSS) or functionality/behavior (JavaScript).

wikipedia.org

https://en.wikipedia.org/wiki/Html

HTML - Wikipedia

HTML is a markup language that web browsers use to interpret and compose text, images, and other material into visible or audible web pages. Default characteristics for every item of HTML markup are defined in the browser, and these characteristics can be altered or enhanced by the web page designer's additional use of CSS.

web.dev

https://web.dev/learn/html/

Learn HTML - web.dev

This HTML course for web developers provides a solid overview for developers, from novice to expert level HTML.

geeksforgeeks.org

https://www.geeksforgeeks.org/html/html-basics/

HTML Basics - GeeksforGeeks

HTML (HyperText Markup Language) is the standard markup language used to create and structure web pages. It defines the layout of a webpage using elements and tags, allowing for the display of text, images, links, and multimedia content.

tutorialspoint.com

https://www.tutorialspoint.com/html/index.htm

Learn HTML: Completely Free Tutorial for Beginners and Developers

HTML stands for H yper T ext M arkup L anguage. It is not a programming language, but a markup language used to create the structure and content of a webpage. HyperText: Refers to the "links" that connect web pages, allowing you to navigate the internet.

w3schools.com

https://www.w3schools.com/

W3Schools Online Web Tutorials

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

w3schools.in

https://www.w3schools.in/html

HTML Tutorial - W3Schools

HTML is the backbone of web development, defining the structure and content of web pages. This tutorial introduced you to the basic structure of an HTML document, essential tags, and practical steps to get started.

web.dev

https://web.dev/learn/html/welcome

Welcome to Learn HTML! - web.dev

HyperText Markup Language, or HTML, is the backbone of the web, providing the content, as well as the structure of that content, that you see displayed in your web browser.

devdoc.net

https://devdoc.net/web/developer.mozilla.org/en-US…

HTML basics - Learn web development | MDN

HTML (H ypertext Markup Language) is the code that is used to structure and display a web page and its content. For example, content could be structured within a set of paragraphs, a list of bulleted points, or using images and data tables.