3. Block elements and elements

3. Block elements and elements

1. elements are divided into block elements and inline elements (intra-row elements ).

1) block element features:

1. Exclusive row by default
2. When there is no width, a row is full by default.
3. supports all css commands

2) block element code: Use common block-level element div and p as an example.

　　

<! DOCTYPE html> 
3) The Code effect is as follows:
　　
4) commonly used block-level elements:
Address-address
Blockquote-block reference
Center-center alignment Block
Dir-directory list
Div-common block-level containers are also the main labels of css layout.
Dl-definition list
Fieldset-form Control Group
Form-interactive form
H1-title
H2-subtitle
H3-Level 3 title
Level h4-4 title
H5-Level 5 Title
H6-6 level title
Hr-horizontal Separator
Isindex-input prompt
Menu-menu list
Optional content of noframes-frames (content in this block is displayed in browsers that do not support frame)
Noscript-optional script content (this content is displayed in browsers that do not support scripts)
Ol-sort form
P-paragraph
Pre-format text
Table-table
Ul-non-sorted list (unordered list)
5) block-level element Overview
Block elements, also known as block elements, correspond to inline elements. They are all concepts in html standards. Most HTML elements are defined as block-level elements or Inline elements. When a block-level element is displayed in a browser, it usually starts (and ends) with a new line ).