| /** | |
| Convert a string to a valid [JavaScript identifier](https://developer.mozilla.org/docs/Glossary/Identifier). | |
| Different inputs will always generate unique identifiers. | |
| @example | |
| ``` | |
| import toValidIdentifier from 'to-valid-identifier'; | |
| toValidIdentifier('foo'); | |
| //=> 'foo' | |
| toValidIdentifier('foo-bar'); | |
| //=> 'foo$j$bar' | |
| toValidIdentifier('$'); | |
| //=> '$a$' | |
| toValidIdentifier('undefined'); | |
| //=> '$_undefined$' | |
| ``` | |
| */ | |
| export default function toValidIdentifier(value: string): string; |