Rules Hub
Coding Rules Library
← Back to all rules
Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
frontend ruleP2stack specificStack: javascript
domobserverscleanupreact
Use observer.disconnect() instead of tracking refs to unobserve
When cleaning up an IntersectionObserver/ResizeObserver, call disconnect() rather than holding the element to call unobserve and null-checking refs.
PR: hegnar-web · org-mining-hist-2026-06Created: Jun 19, 2026
Bad example
Old codejavascript
| 1 | return () => { |
| 2 | if (ref.current) observer.unobserve(ref.current); |
| 3 | }; |
Explanation (EN)
Objašnjenje (HR)
Good example
New codejavascript
| 1 | return () => observer.disconnect(); |
Explanation (EN)
Objašnjenje (HR)