Function defaultIfEmpty

defaultIfEmpty(
text?: null | string,
defaultValue?: null | string,
): undefined | null | string
Returns the default value if the given text is empty, or the text self if it is not empty
Parameters
- Optionaltext: null | string
  the text to check
- OptionaldefaultValue: null | string
  the default value placeholder
Returns undefined | null | string
the default value if the given text is empty, or the text self if it is not empty
Author
David Hsing
Example
```
defaultIfEmpty(undefined, 'foobar');    // 'foobar'
```