3 ms·

React does full tree redraws (well, unless you use memo). useEffect is for side-effects.

• toastercat 3y ago
  It does not. Child components will only render when their parent component re-renders or for example, its state changes. Either way, this is different than what I mean with Mithril.js (it does full tree re-renders on event handler calls or when a manual redraw function is called).
• Izkata 3y ago
  Class components have "shouldComponentUpdate()" that avoids this entirely.