What is the css box model? A brief introduction to the css box model
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Box model
1. Definition
1. Any element can be used as a box model
2. The size of the box is determined by the content width/height ) Margin (padding) Border (border)
3. The box is affected by the outer margin (margin), which affects the position of the box
Generalized box model: all functional and content tags in the document, and all display properties in the document Tags.
Narrow box model: Tags that exist in block-level form in documents (block-level tags have 100% of the characteristics of the box model and are the most commonly used)
2. Introduction to box model members
content
Specify content by setting width and height
Block-level tags can set their own width and height, and the default width is the parent width (width =auto), the height is automatic (expanded by content)
Inline tags cannot set their own width and height, and the default is automatic (expanded by content)
border
- ##Border (border) consists of three parts: border-width (width), border-color (color), and border-style (style)
- border members: border-left, border-right, border-top, border-bottom ##border-width members: border-left-width , border-right-width, border-top-width, border-bottom-width
- border-color members: border-left-color, border-right-color, border-top -color, border-bottom-color
- ##border-style members: border-left-style, border-right-style, border-top-style, border-bottom-style
##dashed | |
dotted | |
double | |
groove | |
ridge | |
inset | |
outset | |
margin |
- margin overall setting
- ##Number of assignments
1 | |
---|---|
2 | Up and down|Left and right |
3 | Up|Left|Down |
4 | Up|Right|Down|Left |
Summary: 1. Specify the starting position 2. Clockwise 3. Not looking for the opposite side |
- 3. border-radius
border-radius
border-radius member
- member
border-top-left-radius | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
border-top-right-radius | upper right position | |||||||||||||||||||
border-bottom-left-radius | lower left position | |||||||||||||||||||
border-bottom-right-radius | Bottom right radius | |||||||||||||||||||
Number of assignments (value type: length or percentage): 1 Interpreted as: horizontal and vertical
Format: 1/1 Interpreted as: Horizontal|Vertical 4. Other related attributes
|
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