Why your React child re-renders even when props didn't change | React Interview Deep Dive #6
Changed props don't guarantee a DOM update.
Unchanged props don't prevent a re-render.
Both assumptions are wrong — and both trip people up in senior React interviews.
In this video: why children re-render by default with the parent regardless of props,
how React.memo enables shallow comparison as an opt-in, why reference identity
of objects and functions matters, and how to split props to minimize unnecessary renders.
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• React Interview Deep Dive — How React Actu...