Function maskText

maskText(
text: string,
options?: { maskChar?: string; visibleEnd?: number; visibleStart?: number },
): string
Partially masks a string for display purposes (e.g. showing a masked email or card number in a UI without exposing the full value).

If neither visibleStart nor visibleEnd is given, the first 2 characters are shown by default. Specifying either one turns off that implicit default for the side you didn't specify — e.g. passing only visibleEnd hides the start entirely, rather than also showing the first 2 characters.
Parameters
- text: string
  Text to mask.
- options: { maskChar?: string; visibleEnd?: number; visibleStart?: number } = {}
  - OptionalmaskChar?: string
    
    Character(s) to use for masked positions. Default is '*'.
  - OptionalvisibleEnd?: number
    
    Number of characters to leave visible at the end.
  - OptionalvisibleStart?: number
    
    Number of characters to leave visible at the start.
Returns string
The masked string, or the original string unchanged if the requested visible portions cover the whole string.
Example
```
maskText('jordan@example.com'); // 'jo****************'
maskText('4111111111111234', { visibleEnd: 4 }); // '************1234'
maskText('secret-token-value', { visibleStart: 0, visibleEnd: 0, maskChar: '#' }); // '##################'
```
- Defined in text/mask.ts:22