rendering-conditional-render

Use Explicit Conditional Rendering

Use explicit ternary operators (? : ) instead of && for conditional rendering when the condition can be 0 , NaN , or other falsy values that render.

Incorrect (renders "0" when count is 0):

function Badge({ count }: { count: number }) { return ( <div> {count && <span className="badge">{count}</span>} </div> ) }

// When count = 0, renders: <div>0</div> // When count = 5, renders: <div><span class="badge">5</span></div>

Correct (renders nothing when count is 0):

function Badge({ count }: { count: number }) { return ( <div> {count > 0 ? <span className="badge">{count}</span> : null} </div> ) }

// When count = 0, renders: <div></div> // When count = 5, renders: <div><span class="badge">5</span></div>

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