The difference between HTML 5 and HTML 4

(1) HTML 5 compared to HTML 4, the syntax changes, the following four aspects:

Example of change in character encoding:

Omit Tag Value:

(2) New and deprecated elements

(3) Add HTML Global Properties

(1) Specifies whether the element can be edited

(2) Specify whether the page can be edited on : editable off: not editable

(3) True: Make an element invisible

(4) Spelling and grammar checking of text

(5) The Access order is accessed by TabIndex , by default only form elements and link elements can press the Tab key to automatically get focus

If you need to mask tab, but you must set tabindex

The difference between HTML 5 and HTML 4