# 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 () => {
  opentelemetry.startSpan("Global Flow")
})()
  .catch((error) => {
    console.error(error.message)
    recognizedObject.answers.push('')
    recognizedObject.errorInfo = {
      ...recognizedObject.errorInfo,
      label: {
        data: error.toJSON ? error.toJSON() : {},
        message: error.message,
      },
    }
  })
  .finally(() => {
    next()
  })

```

### End Span

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

```