---
id: fast-element.bindingobserver.observe
title: BindingObserver.observe() method
hide_title: true
---
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[@microsoft/fast-element](./fast-element.md) &gt; [BindingObserver](./fast-element.bindingobserver.md) &gt; [observe](./fast-element.bindingobserver.observe.md)

## BindingObserver.observe() method

Begins observing the binding for the source and returns the current value.

<b>Signature:</b>

```typescript
observe(source: TSource, context: ExecutionContext<TParent>): TReturn;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  source | TSource | The source that the binding is based on. |
|  context | [ExecutionContext](./fast-element.executioncontext.md)<!-- -->&lt;TParent&gt; | The execution context to execute the binding within. |

<b>Returns:</b>

TReturn

The value of the binding.
