> a lot of the data on the site actually comes from MDN

Eh... not really.

The feature support matrix (as linked on CanIUse) comes from the browser-compat-data repo. Here's the HTML element's source data: https://github.com/mdn/browser-compat-data/blob/main/html/el...

This doesn't contain the testing and usage info that CanIUse cites for support, though, just which browser versions included which features.

CanIUse also points to their own repo, which contains a lot of data: https://github.com/fyrd/caniuse

But I can't find an easy entry point to find where they're getting the numbers for a specific element. The data on there seems to be primarily for features.

So the more precise question is, where is CanIUse getting HTML element testing and usage numbers from? Because that seems to be the issue.

The key factor for web development to stop new CSS features is cross-platform compatibility. If you want to know the compatibility data of a new feature, you can get it through platforms such as Can I Use , Browser Compat Data and Time to Stable .

Yes, Mozzila’s browser-compat-data (https://github.com/mdn/browser-compat-data) is the authoritative source.

Just noting that the browser support matrix is right here: https://web.dev/patterns/advanced-apps/contacts/#:~:text=con...

It's an Eleventy widget powered by MDN's browser-compat-data: https://github.com/mdn/browser-compat-data.

https://developer.mozilla.org Is your best friend, they even have an examples how to use it

Visit any website on https://developer.chrome.com, https://developer.mozilla.org or https://docs.microsoft.com.

W3Schools and MDN Web Docs are two great resources to learn about elements and all about HTML and CSS. Kevin Powell has a great YouTube channel which explains everything you search for. If you want to incline in your HTML and CSS skills pretty quickly, think of your objective, maybe even sketch it out, then search absolutely everything on Google and it will give you the answer. If not, this subreddit is always open. Bon voyage

W3Schools: This website offers free tutorials and references on web development languages and technologies, including HTML, CSS, JavaScript, and many others. It's a great resource for learning the basics and exploring more advanced topics. Access their materials at W3Schools.com.

W3Schools: As a trusted source of tutorials and references, W3Schools helps me to understand more in HTML, CSS, and JavaScript.

W3Schools (Visit Site)

W3Schools - Provides tutorials, references, and exercises on HTML, CSS, JavaScript, and other web technologies. W3Schools

To successfully follow through with this project, a foundational knowledge of HTML, CSS, and JavaScript is imperative. If you are unfamiliar with any of these web tools, consider reviewing introductory materials for HTML, CSS, and JavaScript before proceeding with this tutorial. A good resource to explore would be W3Schools, or you can choose any excellent tutorial on YouTube.

Hey, I'd recommend W3Schools. Although not up to date it's a great platform to test out fundamentals and get a small environment quickly for simplicity sakes.

My advice would be to start with a free site, like https://www.w3schools.com/ , choose a language and start. They make it easy. Then, treat AI like a tutor, and ask it questions as needed.

: This tag specifies the title of the HTML document.

: This tag contains the content of the HTML document.

: This tag defines a paragraph of text.

: This tag defines the most important heading on the page.

: This tag defines the second most important heading on the page.

: This tag defines the third most important heading on the page.

These are just a few of the many HTML tags that are available. For a complete list of HTML tags, please visit to the W3C.

Alternatively, a third-party tool, such as the selector gadget extension for Chrome, can be used to quickly create selectors. To understand more about selectors, w3schoolshas a good CSS reference page to learn CSS selectors.

My 2 cents: keep working with Go. Learn just enough about templates to start, JSON to struct mapping and URL routing. It's not a great backend, but the client is what you really need to learn. For the client look through browser tools F12. For the basics of HTML, CSS and JavaScript skim through https://www.w3schools.com/ [People HATE this site but it has very limited info, making it a quick read.] For actual documentation use MDN https://developer.mozilla.org/ and skip any framework/library until you have the basics.