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

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [ResolverFunction](./context.resolverfunction.md)

## ResolverFunction interface

A function to provide resolution of injected values.

**Signature:**

```typescript
export interface ResolverFunction 
```

## Example


```ts
const resolver: ResolverFunction = (ctx, injection, session) {
  return session.currentBinding?.key;
}
```