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

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

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

## Context.add() method

Add a binding to the context. If a locked binding already exists with the same key, an error will be thrown.

**Signature:**

```typescript
add(binding: Binding<unknown>): this;
```

## Parameters

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

Parameter


</th><th>

Type


</th><th>

Description


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

binding


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

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


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

The configured binding to be added


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

**Returns:**

this