SMRTR ProgrammingJun 8, 2026Go Make Things

How to detect when an element's visibility changes with JavaScript

SMRTR summary

The IntersectionObserver API detects when a hidden element becomes visible, even inside toggled parent containers, firing a callback when it enters the viewport so you can trigger layout recalculations at the right moment.

SMRTR provides this summary for quick context. The original article belongs to Go Make Things.

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