Five specifications of html

The opening tag and closing tag of an html file

• and

html contains two parts of content
##
• Set related information
  
  
  
  
  ##
The content displayed on the page is written in the body

• html tags are in pairs

• html code is not case-sensitive

• Some tags end within the tag. For example, line break:

  
  
Separation line:

• ---

  ##Form tag

• ##

  and

• Get request address bar will carry the submitted data, post will not carry it

Get request security level is low , post is higher
Get request data size limit, post has no limit
There are two commonly used get and post. The default get is get. Request
action: submit to the address, default to the current page
method: form submission method
enctype: This attribute is not required for general requests. You need to set this attribute when uploading files.
Interview question: The difference between get and post
• Input items: You can enter content and select parts of the content

• Normal input items:

• Password input item:

• ##Single choice Input item:

  -> The attribute name is required inside

  -> The attribute values ​​of name must be the same
-> There must be a value

• Check input item:
  
  
  -> The attribute name is required inside

  -> The attribute values ​​of name must be the same
-> There must be a value

• File input item (used when uploading later)
  ->
  
  

• ##Drop-down input item (not in the input tag)

  
  

  
      请选择
      1991
      1992
      1993
      1994
  

  Copy after login
  Text field

• 
  

  Copy after login

• Hidden items (will not be displayed on the page, but exist in the html code )

  
  

Copy after login
• Submit button

  
  

Copy after login
• Submit using image

  
  

Copy after login
• Most input items use

  
  

• Use of other common tags in html

b
– bold

• s

  – strikethrough

• u

  – underline

## i
• – Italic

pre
• – Output

sub
• and ## as is #sup

  – subscript and superscript

• div – Automatic line wrapping

• span – Display

## on one line

• html consists of two parts: head and body

• You can use the link tag to introduce css files

• You can uniformly set the opening method of hyperlinks

  – Set the full-text hyperlink to open in a new window

• – Previous search engine retrieval method

• – Three seconds jump

• Tags in the head It is the header tag

• title tag: indicates the content displayed on the tag

• tag: sets some related content of the page

• base tag: set the basic settings of the hyperlink

• link tag: introduce external files

• ##

  Tag

rows: Divide by row
cols: Divide by columns

• tag

##

• Specific displayed page

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