Web Coding Center
CSS
Values
Absolute Length Units
Relative Length Units
Angle Units
Time Units
Resolution Units
Color Values
Image Values
Positioning Values
Default Values
CSS Variables
Numerical Functions
Selectors
Class Naming
Direct Selectors
Associative Selectors
Attribute Selectors
Navigation Selectors
Input Selectors
Child Selectors
Pseudo element Selectors
Info graphic Selectors
Printer Selectors
Specificity
at rules
@font face
@keyframes
@import
@media
@support
@charset
@page
@namespace
Experimental Proposals
Text Properties
Alignment
Spacing
Overflow
Direction
Surrounding
Font
Multiple Columns
Generated Content Properties
Interface
Graphic Properties
Background
Imaging
Visibility
Shaping
List and Table Properties
List
Table
Box Model Properties
Positioning
Sizing
Margin, Border, Padding
Radius, Shadow and Wrapping
Flex, Grid
Transformation
Scrolling, Snapping
Animation Properties
Transition
keyframes
Offset
Responsive Web Design
Relative Lengths
Min ,Max-Lengths, Float
Flex, Grid, Columns
Breakpoints
Separate Stylesheets
Viewport <meta> tag
Media Queries
<source>
SVG
Web Fonts
Responsive Frameworks
Extensions
LESS
SCSS, SASS
Stylus
PostCSS
Frameworks
Miscellaneous Libraries
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@keyframes
This defines animated properties. (more
here
)