React Performance: Rendering — Conditional Render. Keywords: conditional render ternary. Platform: React/Next.js. Description: Use ternary instead of && when condition can be 0 or NaN. Do: Use explicit ternary for conditionals. Don't: Use && with potentially falsy numbers. Good Example: {count > 0 ? <Badge>{count}</Badge> : null}. Bad Example: {count && <Badge>{count}</Badge>} // renders '0'. Severity: Low.