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Sticky Header

This lesson is part of How To · All levels

Summary

Sticky header is a header that remains visible on the screen after the user scrolls past a certain boundary. JavaScript can monitor the scroll's position and then add a sticky class that changes the position or shadow of the header. This pattern is often used on sites with key navigation that needs to be available at all times.

Key points

Compare window.scrollY to the threshold to determine sticky status
ClassList.toggle('sticky', condition) add or remove classes automatically
Position: sticky or fixed used to hold the header above
Add z-index and shadows to separate the header from the content

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