CSS fragmentation

The CSS fragmentation module defines how content is displayed when it is broken (fragmented) across multiple pages, regions, or columns.

Fragmentation occurs when an inline box wraps onto multiple lines. It also occurs when a block spans more than one column inside a column layout container, or spans a page break when printed. Each piece of the rendering for the element is called a fragment.

Reference

Properties

Specifications

Specification
CSS Fragmentation Module Level 3