Function isWhitespace

isWhitespace(text: string): boolean
Determines if the given text is only comprised of whitespace.
Parameters
- text: string
Returns boolean
Remarks
This is null | undefined safe. If you pass null | undefined then this will return true.
Example
```
isWhitespace(null); // true
isWhitespace("   "); // true
isWhitespace("\n\t"); // true
isWhitespace("Hello"); // false
```
- Defined in strings.ts:13