CSS Overflow Module Level 4

The provided documents detail the CSS Overflow Module Level 4, a specification that enhances how web browsers handle content exceeding an element's boundaries. It introduces sophisticated controls like line-clamp and max-lines to restrict visible text to a specific number of lines, alongside a block-ellipsis property for custom truncation indicators. The module also expands clipping capabilities through overflow-clip-margin, allowing developers to extend the paintable area beyond traditional box edges. Significant experimental features are explored, including text-overflow: fade for smooth transparency transitions and a continue property that can discard or redirect overflow into new fragments. Technical analysis highlights Blink's implementation strategies, such as the "collapse" approach for line-clamping and the integration of overscroll-behavior to manage scroll chaining on mobile devices. Collectively, these sources illustrate an evolving standard aimed at providing more ergonomic, high-performance tools for complex layout management and pagination.