piperh + backtotop   2

How to: Back-to-top button without scroll events - Signal v. Noise
intro says: Web developers: here’s an alternative way to build UI features that rely on scroll position without actually observing scroll events. Using the Intersection Observer API ...
webdesign  web  design  backtotop  back  top  scroll  browser  window  layout  intersection  observer  api  viewport 
february 2019 by piperh

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