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# WeakSet.prototype.has

The **`has()`** method returns a boolean indicating whether an
object exists in a `WeakSet` or not.

## Syntax

```js
has(value)
```

### Parameters

- `value`
  - : Required. The object to test for presence in the `WeakSet`.

### Return value

- Boolean
  - : Returns `true` if an element with the specified value exists in the
    `WeakSet` object; otherwise `false`.
