1. Basic Structure
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> </body> </html>
（1) <!doctype html>
doctype in Chinese means '' Document Type ''
Markup language document type, tells the browser what kind of document types to parse HTML documents
(2) <meta charset="utf-8">
<meta> element is used to specify the type of string code
directly charset attribute specified string encoding
<meta charset = "utf-8 ">
example: "utf-8" is a common form of coding, also known as "nations code"
(3) <title></title>
<Head> tag of various attributes H5 page configuration information will be described, the page will not render content
The <head> described as identity cards, <tittle> is the name on the ID card, <meat> is the display language
(4) <body></body>
<Body> contains the contents of the information presented to viewers