1---
2title: Use Explicit Conditional Rendering
3impact: LOW
4impactDescription: prevents rendering 0 or NaN
5tags: rendering, conditional, jsx, falsy-values
6---
7 
8## Use Explicit Conditional Rendering
9 
10Use explicit ternary operators (`? :`) instead of `&&` for conditional rendering when the condition can be `0`, `NaN`, or other falsy values that render.
11 
12**Incorrect (renders "0" when count is 0):**
13 
14```tsx
15function Badge({ count }: { count: number }) {
16  return (
17    <div>
18      {count && <span className="badge">{count}</span>}
19    </div>
20  )
21}
22 
23// When count = 0, renders: <div>0</div>
24// When count = 5, renders: <div><span class="badge">5</span></div>
25```
26 
27**Correct (renders nothing when count is 0):**
28 
29```tsx
30function Badge({ count }: { count: number }) {
31  return (
32    <div>
33      {count > 0 ? <span className="badge">{count}</span> : null}
34    </div>
35  )
36}
37 
38// When count = 0, renders: <div></div>
39// When count = 5, renders: <div><span class="badge">5</span></div>
40```
41