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):

tsx

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):

tsx

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>