Difference: 1. HTML’s document type declaration is long and complex, while HTML5’s document declaration is relatively simple, which is conducive to programmers’ quick reading and development; 2. HTML5 supports SVG, canvas and other virtual Vector graphics, but HTML does not support it; 3. HTML itself does not support audio and video, but HTML5 does, etc.
The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.
HTML
HTML is called Hypertext Markup Language, and most web pages are written in HTML code. HTML allows developers to determine exactly how multimedia, text, and hyperlinks are displayed in a web browser. In HTML, tags are used to define text structure; tags and elements are defined using the <> character, and the browser is primarily responsible for rendering web content through these tags. But over time, tags used to define document styles have almost been deprecated, as we have begun to prefer style sheets to add richness to web pages, and only content definition tags still form the core HTML.
HTML5
HTML5 is the fifth version of HTML. Many elements have been deleted or modified in HTML5.
Over time, HTML has seen many updates, and the latest version of HTML is currently HTML5. It is still a markup language, but it adds many features to raw HTML and removes some of the strictness present in XHTML. It greatly improves the user experience.
The difference between html and html5
1. The difference between document type declaration
In HTML 5, the Doctype declaration is very simple and easy to use. The Doctype declaration is in Too long and complex in HTML
The type declaration of HTML document is:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
//或
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">The type declaration of HTML5 document is:
<!DOCTYPE html>
HTML5.0: Document declaration HTML5 It is easy to write and concise, which is helpful for programmers to read and develop quickly.
2. The difference between vector graphics
HTML5 supports SVG, canvas and other virtual vector graphics, while in HTML, it can only be combined with different technologies such as Flash and Silver-light. Vector graphics can only be used together.
3. The difference between audio and video support
If HTML does not use Flash player support, it does not support audio and video. HTML5 uses the
4. Differences in structural semantics
html: There are no tags that reflect structural semantics, such as:
html5: Added many semantic tags, such as:
Relative to HTML , some new and modified elements have been added in HTML5.
5. Syntax processing
HTML cannot handle inaccurate syntax; HTML5 can handle inaccurate syntax.
6. HTML5 adds new form controls, such as: date and time, email, number, range, phone, URL, search, etc.
7. The attributes of charset, async and ping are part of HTML 5. Attributes such as charset, async and ping do not exist in HTML.
8. Enhanced support for web application functions: HTML5 allows the browser to run as an application platform without using any JS or Flash based methods as all functionality is provided by the elements inherent in HTML5.
9. The newly added
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
