CSS generated content
The CSS generated content module defines how an element's content can be replaced and content can be added to a document with CSS.
Generated content can be used for content replacement, in which case the content of a DOM node is replaced with a CSS <image>
. The CSS generated content also enables generating language-specific quotes, creating custom list item numbers and bullets, and visually adding content by generating content on select pseudo-elements as anonymous replaced elements.
Generated content in action
The HTML for this sample is a single, empty <div>
inside an otherwise empty <body>
. The snowman was created with CSS images and CSS backgrounds and borders. The carrot nose was added using generated content: an empty box with a wide orange left border added to the ::before
pseudo-element. The text is also generated content: "only one <div>" was generated with the content
property applied to the ::after
pseudo-element.
Click "Play" in the example above to see or edit the code in the MDN Playground.
Reference
Properties
Functions
The CSS generated content module introduces six yet-to-be implemented CSS functions including content()
, string()
, and leader()
, and the three <target>
functions target-counter()
, target-counters()
, and target-text()
.
Data types
Guides
- "How to" guide for generated content
-
Learn how to add text or image content to a document using the
content
property. - Create fancy boxes with generated content
-
Example of styling generated content for visual effects.
Related concepts
-
CSS pseudo-elements module
-
CSS lists and counters module
counter()
functioncounters()
functioncounter-increment
propertycounter-reset
property
-
CSS values and units module
Specifications
Specification |
---|
CSS Generated Content Module Level 3 |
See also
- CSS pseudo-elements module
- CSS lists and counters module
- Replaced elements