@loopback/docs/site/apidocs/rest.routingtable._constructor_.md

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---
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title: 'API docs: rest.routingtable._constructor_'
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[Home](./index.md) &gt; [@loopback/rest](./rest.md) &gt; [RoutingTable](./rest.routingtable.md) &gt; [(constructor)](./rest.routingtable._constructor_.md)

## RoutingTable.(constructor)

Constructs a new instance of the `RoutingTable` class

**Signature:**

```typescript
constructor(_router?: RestRouter, _externalRoutes?: ExternalExpressRoutes | undefined);
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td markdown="1">

\_router


</td><td markdown="1">

[RestRouter](./rest.restrouter.md)


</td><td markdown="1">

_(Optional)_


</td></tr>
<tr><td markdown="1">

\_externalRoutes


</td><td markdown="1">

ExternalExpressRoutes \| undefined


</td><td markdown="1">

_(Optional)_


</td></tr>
</tbody></table>