@loopback/docs/site/apidocs/context.context.getbinding.md

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---
lang: en
title: 'API docs: context.context.getbinding'
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.context.getbinding.html
---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [Context](./context.context.md) &gt; [getBinding](./context.context.getbinding.md)

## Context.getBinding() method

Look up a binding by key in the context and its ancestors. If no matching binding is found, an error will be thrown.

**Signature:**

```typescript
getBinding<ValueType = BoundValue>(key: BindingAddress<ValueType>): Binding<ValueType>;
```

## Parameters

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

Parameter


</th><th>

Type


</th><th>

Description


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

key


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

[BindingAddress](./context.bindingaddress.md)<!-- -->&lt;ValueType&gt;


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

Binding key


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

**Returns:**

[Binding](./context.binding.md)<!-- -->&lt;ValueType&gt;