# better-tailwindcss/no-concatenated-classes
Disallow concatenated Tailwind CSS classes in class strings.
Concatenated or interpolated class names can be missed by Tailwind's class detection and may be purged from the final CSS output.
See the [Tailwind documentation](https://tailwindcss.com/docs/detecting-classes-in-source-files).
## Examples
```text
// ❌ BAD: class name built dynamically via concatenation
;
```
```tsx
// ❌ BAD: class name built dynamically via interpolation
;
```
```tsx
// ✅ GOOD: class name is fully static and detectable
;
```