# bindTo

### **Importing** <a href="#importing" id="importing"></a>

```typescript
import { bindTo, bingLazilyTo } from '@marblejs/core';
```

### **Type declaration**

```
bindTo ::  ContextToken -> ContextReader -> BoundDependency
bindLazilyTo ::  bindTo
```

The function is responsible for binding context token to `ContextReader` which can be a **fp-ts** `Reader` instance or plain a `() => T`. The function is producing a lazy binding, which means that, the dependency will be evaluated on it's first call (injection).

`bindTo` is an alias of `bindLazilyTo`.&#x20;

### **Example**

```typescript
import { reader, bindTo, createContextToken } from '@marblejs/core';
import { createServer } from '@marblejs/http';
import { pipe } from 'fp-ts/lib/function';
import * as R from 'fp-ts/lib/Reader';

// create reader

const FooToken = createContextToken<Foo>('FooToken');

const foo = pipe(reader, R.map(ask => {
  const otherDependency = ask(OtherToken);
  
  return { ... };
});


// bind reader to token

const boundDependency = bindTo(FooToken)(foo);
```


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