---
url: /reference/@cssdoc/core/functions/cardinalityIsDashed.md
---
# Function: cardinalityIsDashed()

```ts
function cardinalityIsDashed(cardinality): boolean;
```

Defined in: [packages/core/src/cardinality.ts:36](https://github.com/thedannywahl/cssdoc/blob/main/packages/core/src/cardinality.ts#L36)

Only a plain `:optional` (0..1) renders as a dashed edge in the Mermaid flowchart.

## Parameters

### cardinality

`Cardinality`

## Returns

`boolean`