A table with both a sticky header and a sticky first column

We've explored how individual table cells (<th> and <code><td>) can utilize <code>position: sticky. Creating a sticky table header is straightforward, keeping it visible while scrolling through numerous rows. However, stickiness extends beyond vertical scrolling; horizontal stickiness is equally useful. We can even have multiple sticky elements within a single table, each sticking in different directions, or even a single element sticky in multiple directions.

This video demonstrates a table with both a sticky header and a sticky first column: [Assume video link here - replace with actual video link if available]

The primary benefit? Enhanced cross-referencing in tabular data. Imagine a baseball score table with many teams; keeping team names and inning numbers visible prevents context loss during scrolling.

Not all tables require bidirectional cross-referencing. Many benefit from row collapsing on smaller screens.

The challenge lies in managing overlapping elements. Sticky cells require backgrounds to prevent content bleed-through and careful z-index management to ensure correct layering when stuck. The key is layering:

• tbody > th cells must be above regular cells for horizontal scroll stability.
• thead > th cells must be above tbody > th cells for vertical scroll stability.
• thead > th:first-child must have the highest z-index, staying above both body cells and sibling headers during horizontal scrolling.

It's a complex layering puzzle, but achievable.

Thanks to Cameron Clark for the initial demo and Estelle Weyl for her earlier implementation – a testament to Estelle's forward-thinking approach.

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