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

Documentation for LoopBack 4

---
lang: en
title: 'API docs: context.provider'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.context.provider.html
---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [Provider](./context.provider.md)

## Provider interface

Providers allow developers to compute injected values dynamically, with any dependencies required by the value getter injected automatically from the Context.

<b>Signature:</b>

```typescript
export interface Provider<T> 
```

## Methods

|  Method | Description |
|  --- | --- |
|  [value()](./context.provider.value.md) |  |

## Example


```ts
export class DateProvider implements Provider<Date> {
  constructor(@inject('stringDate') private param: String){}
  value(): Date {
    return new Date(param);
  }
}

ctx.bind('stringDate').to('2017-01-01')
ctx.bind('provider_key').toProvider(DateProvider);

const value = ctx.getAsync('provider_key');
// value is a Date instance

```