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.
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.
To see the code for this animation, view the source on GitHub.
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().
Learn how to add text or image content to a document using the content property.
Example of styling generated content for visual effects.
counter() functioncounters() functioncounter-increment propertycounter-reset property| Specification |
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| CSS Generated Content Module Level 3 |
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https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_generated_content