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# get Map\[Symbol.species]

The **`Map[Symbol.species]`** accessor property is an unused accessor property specifying how to copy `Map` objects.

## Syntax

```js
Map[Symbol.species]
```

### Return value

The value of the constructor (`this`) on which `get Symbol.species` was called. The return value is used to construct copied `Map` instances.

## Description

The `Symbol.species` accessor property returns the default constructor for `Map` objects. Subclass constructors may override it to change the constructor assignment.

> **Note:** This property is currently unused by all `Map` methods.
