---
title: "rendering conditional render"
description: "Use explicit ternary operators (`? :`) instead of `&&` for conditional rendering when the condition can be `0`, `NaN`, or other falsy values that render."
type: skill
canonical_url: https://claudary.paisolsolutions.com/skills/rendering-conditional-render
source: "Claudary"
difficulty: intermediate
author: "Claude Code Knowledge Pack"
date: 2026-07-10T11:37:36.455Z
license: CC-BY-4.0
attribution: "rendering conditional render — Claudary (https://claudary.paisolsolutions.com/skills/rendering-conditional-render)"
---

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

## Overview

---
title: Use Explicit Conditional Rendering
impact: LOW
impactDescription: prevents rendering 0 or NaN
tags: rendering, conditional, jsx, falsy-values
---

## 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>
```

---

Source: [Claudary](https://claudary.paisolsolutions.com/skills/rendering-conditional-render) · https://claudary.paisolsolutions.com