Differences between HTML4 and HTML5 is displeyed at here by W3 per ECLoc549
On my own I found the latest version of HTML as 5.2 and working draft 5.3 in Wikipedia
The HTML5 test score is an indication of how well your browser supports the HTML5 standard and related specifications.
This web page determined that I use Chrome Dev 72.0.3626.109 or Firefox 65.0 on Windows 10. The display shows that my browser scores 535 out of 555 points. The list given on this web page details the extent of support by categories.
| Chrome | Opera | Firefox | Edge | Safari | |
|---|---|---|---|---|---|
| Items | 528 | 518 | 491 | 492 | 471 |
| Version | 66 | 45 | 59 | 17 | 11.1 |
Note that the definition of the p tag had to be repeated, because there was no inheritance p tag definition after the table.
HTML documents imply a structure of nested HTML elements. These are indicated in the document by HTML tags, enclosed in angle brackets thus: <p>.
In the simple, general case, the extent of an element is indicated by a pair of tags: a "start tag" <p> and "end tag" </p>. The text content of the element, if any, is placed between these tags.
Tags may also enclose further tag markup between the start and end, including a mixture of tags and text. This indicates further (nested) elements, as children of the parent element.
The start tag may also include attributes within the tag. These indicate other information, such as identifiers for sections within the document, identifiers used to bind style information to the presentation of the document, and for some tags such as the <img> used to embed images, the reference to the image resource.
CSS transforms, animation, and transitions are covered in the link.
Improved layout methods are discussed at this site and in the Net Magazine per ECloc467.
The book’s companion website contains the table of contents, every complete code example featured in the book (plus some additional ones that wouldn’t fit), links to resources cited in the book (as well as additional ones), a list of errata, and more. D
The URLs for some of the key pages on the site follow: Home page
and most importantly examples