The difference between HTML5 and HTML4

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Reasons and objectives for the launch

The advent of HTML5 is very important for the WEB, because

its intention is to put the present the various problems that exist on the Web are solved

The problem is as follows:

(1) low compatibility between Web browsers

(2) The document structure is not clear

(3) Limited functionality of WEB applications

the world-renowned browser vendors HTML5 's support:

Microsoft, Google, Apple, Opera, Mozilla

Changes in grammar

(1) content type

(2) DOCTYPE statement

(3) specify character encoding

(4) elements that can be omitted from markup

(5) a property with a boolean value

(6) omit quotation marks

New elements and repealed elements

(1) new Elements

1) New structure elements

section, article, aside, header, Hgroup, footer, nav, figure

2) Additional elements added

Video, audio, embed, mark, progress, meter, time, Ruby, RT,

RP, WBR, canvas, command, Details, DataList, DataGrid, keygen,

Output, source, menu

3) type of the new INPUT element

email, URL, number, range, Date pickers

(2) Elements of abolition

1) elements that can be replaced with CSS: Basefont, big, center, font, S, TT, u, etc.

2) no longer use frame frame: frameset, frame, noframes

3) only some elements supported by the browser

4) Other discarded elements

New attributes and properties that are repealed

(1) new properties

1) Form-related properties

2) Link-related properties

(2) Revoked Properties

Global Properties

A global attribute refers to a property that can be used on any element

(1) contenteditable Property

(2)DesignMode Property

(3)hidden Property

(4)spellcheck Property

(5)TabIndex Property

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HTML5 differs from HTML4