---
lang: en
title: 'API docs: context.isbindingaddress'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/context
permalink: /doc/en/lb4/apidocs.context.isbindingaddress.html
---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [isBindingAddress](./context.isbindingaddress.md)

## isBindingAddress() function

Type guard for binding address

**Signature:**

```typescript
export declare function isBindingAddress(bindingSelector: BindingSelector): bindingSelector is BindingAddress;
```

## Parameters

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

Parameter


</th><th>

Type


</th><th>

Description


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

bindingSelector


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

[BindingSelector](./context.bindingselector.md)


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

Binding key or filter function


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

**Returns:**

bindingSelector is [BindingAddress](./context.bindingaddress.md)