withLeadingCharacters 
Usage 
js
import { withLeadingCharacters } from '@studiometa/js-toolkit/utils';
withLeadingCharacters('string', '__'); // "__string"
withLeadingCharacters('__string', '__'); // "__string"Params 
- string(- string): The string to modify.
- characters(- string): The characters to add to the start of the string.
Return value 
- string: The modified string.
 JS Toolkit
JS Toolkit