What is block element block and inline element?

First, we need to understand that all HTML elements are either block or inline ). The following describes the features of block and inline:

Features of block elements:
Always starts on a new line;
Height, row height, and top and bottom margins can be controlled;
The default width is 100% of its container unless a width is set.

Features of the inline element:
And other elements are on one line;
High, the Row Height and top and bottom margins cannot be changed;
The width of a text or image cannot be changed.
Let's take a closer look at their situation.

Block elements are generally the container elements of other elements. Block elements generally start from a new line and can accommodate inline elements and other block elements, the common block element is the section label 'P ". The "form" block element is special. It can only accommodate other block elements.

If no CSS function is available, the block elements are arranged in the order of each row. With CSS, we can change the default layout of HTML and place block elements in the desired position. Instead of just starting another line. It should be noted that table labels are also a type of block elements. Table based layout and CSS based layout are from average users (excluding persons with visual impairment and blind people) the two la s have no difference except the page loading speed. However, if a common user accidentally clicks to view the pageSource codeButton, the difference between the two is very large. The CSS layout page source code, designed based on a good refactoring concept, can at least allow common users without web development experience to quickly understand the content. From this perspective, CSS layout code should have a better aesthetic experience.

You can think of the block container element Div as a box, or it is easier to understand if you have played the clipboard. We needArticleCut down from various newspapers and magazines. Each piece of cut is a block. Then we pasted the paper block to a blank new paper with glue based on our typographical intent. This forms your own unique digest Express. As an extension of technology, webpage layout design follows the same pattern.

Inline elements are generally basic elements based on the semantic level (semantic. Inline elements can only contain text or other inline elements. Common inline elements are "".

It should be noted that the Chinese name of inline element has multiple inline elements, embedded elements, in-line elements, and straight-forward elements. Basically, there is no unified translation. What do you call love. When we mention inline elements, we will think of a display attribute: Display: inline; which can fix the famous IE Double Floating boundary.

Both block element and inline element are concepts in the HTML specification. The basic difference between block elements and inline elements is that block elements generally start from a new line. After CSS control is added, the attribute differences between block elements and inline elements will not be different. For example, we can add the inline element cite to the display: block attribute so that it also has attributes starting from the new line each time.

Variable elements change with the environment based on the above two. The basic concept of variable elements is that they need to determine whether the element is a block element or an inline element based on the context relationship. The variable element still belongs to the above two element categories. Once the context relation determines its category, it must follow the block element or Inline element rule restrictions.

Details of the block and inline types of HTML tags:

Block element ):

◎ Address-address
◎ BLOCKQUOTE-block reference
◎ Center-align Blocks
◎ Dir-directory list
◎ Div-common block levels are easy, and it is also the main tag of CSS layout
◎ DL-definition list
◎ Fieldset-Form Control Group
◎ Form-interactive form
◎ H1-title
◎ H2-subtitle
◎ H3-Level 3 title
◎ H4-4 level 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-sorting form
◎ P-paragraph
◎ Pre-format text
◎ Table-table
◎ Ul-non-sorted list

Inline element ):

◎ A-anchor ◎ abbr-abbreviation
◎ Acronym-First word
◎ B-bold (not recommended)
◎ BDO-bidi override
◎ Big-large font
◎ Br-line feed
◎ CITE-Reference
◎ Code-computerCode(Required when source code is referenced)
◎ Dfn-define a field
◎ Em-emphasis
◎ Font-font setting (not recommended)
◎ I-italic
◎ IMG-Image
◎ Input-input box
◎ KBD-define keyboard text
◎ Label-Table label
◎ Q-short reference
◎ S-hyphen (not recommended)
◎ Samp-Define sample computer code
◎ Select-select a project
◎ Small-small font text
◎ Span-commonly used inline containers, defining text blocks
◎ Strike-dashes
◎ Strong-highlighted in bold
◎ Sub-subscript
◎ Sup-superscript
◎ Textarea-multi-line text input box
◎ Tt-telex text
◎ U-underline
◎ Var-define variables

Variable element:

The variable element determines whether the element is a block element or an inline element based on the context.
◎ Applet-Java Applet
◎ Button-button
◎ Del-delete text
◎ IFRAME-inline Frame
◎ Ins-inserted text
◎ Map-image block (MAP)
◎ Object-object
◎ Script-client script