rendering-conditional-render

Conditional rendering with the logical AND operator (&&) renders falsy values like 0 or NaN as UI text. Use the ternary operator (condition ? element : null) to explicitly control what renders when the condition is false, preventing unintended display of numeric falsy values.

Replace count && <span>{count}</span> with count > 0 ? <span>{count}</span> : null. This explicit ternary ensures the badge renders only when count exceeds zero, avoiding display of 0 as a falsy but renderable value.

The && operator renders the right side when the left is truthy, but renders falsy numbers like 0 or NaN as text. The ternary operator (condition ? element : null) explicitly returns null for false conditions, preventing accidental rendering of falsy values in your UI.

Use explicit ternary conditionals whenever your rendering depends on numeric or other falsy values that are meaningful but shouldn't display. Common cases include badge counts, optional blocks, and UI elements tied to conditions where 0 or NaN should render nothing.

Yes, by using explicit ternary operators. The && operator treats falsy values (0, NaN, empty string) as render candidates, so ternary (condition ? element : null) is required to safely handle numeric conditions and prevent unintended UI output.