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.

Skills
Web development
4

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Install (Claude Code)

mkdir -p .claude/skills/rendering-conditional-render && curl -fsSL https://doutorai.pt/data/lib/skills__rendering-conditional-render.md -o .claude/skills/rendering-conditional-render/SKILL.md

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Content

---
title: Use Explicit Conditional Rendering
impact: MEDIUM
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 c

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