# Open Telemetery Example

## Example Usage

Use the _code block_ widget to start and end spans.  Spans can be nested to form a stack, ending a span will always end the last span added to the stack.

### Start Span

```javascript
(async () => {
  await latencySpan().endSpan(recognizedObject.conversationId);

  const span = await opentelemetry().startSpan("Global Flow");
  console.log(span);
})()
  .catch((error) => {
    console.log(error.message);
    recognizedObject.answers.push("");
    recognizedObject.errorInfo = {
      ...recognizedObject.errorInfo,
      label: {
        data: error.toJSON ? error.toJSON() : {},
        message: error.message,
      },
    };
  })
  .finally(() => {
    next();
  });
```

### End Span

```javascript
(async () => {
  await opentelemetry().endSpan();
})()
  .catch((error) => {
    console.log(error.message);
    recognizedObject.answers.push("");
    recognizedObject.errorInfo = {
      ...recognizedObject.errorInfo,
      label: {
        data: error.toJSON ? error.toJSON() : {},
        message: error.message,
      },
    };
  })
  .finally(() => {
    next();
  });
```