How does this function validate its input — does it throw on bad arguments?

Question

RepoPilot · Accepted Answer

Yes, the function does validate its input and throws on bad arguments.

In [index.js:L2-L4], the function includes explicit type checking:

```javascript
if (typeof string !== 'string') {
	throw new TypeError('Expected a string');
}
```

This means if you pass anything that isn't a string (like a number, object, null, etc.), the function will throw a `TypeError` with the message "Expected a string". After this validation passes, the function proceeds to escape RegExp special characters in the string.

FOLLOW_UPS:
- What characters does this function escape?
- Can I use escaped strings in character classes?
- How does it handle the hyphen character differently?