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About This Episode

You've surely seen this functionality all over the web: you scroll the page a bit, and suddenly the navigation bar slides back into view and "stickies" itself to the top of the page. We can use an IntersectionObserver to make a similar effect. This JavaScript API allows us to pass a callback function that will be triggered each time a target element intersects the root viewport. In this lesson, I'll show you exactly how to code it up.

View the source code for this episode on GitHub.

Published on Oct 22nd, 2019.

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