Is there a bug in escape-string-regexp?

Question

Accepted Answer

Hyphens in Unicode mode With the current behavior of escaping `-`, there is a problem if used in a Unicode regex.

You can see that:

```js
const esc = require('escape-string-regexp');
new RegExp(esc('-'), 'u');
```

gives:

> Invalid regular expression: /\-/: Invalid escape

because this does also:

```js
new RegExp('\-', 'u');
```

Would seem to call for a Unicode mode? (The hyphen would still need escaping (and be safe to use) within a character class though.)

I don't know whether you'd want to get into such parsing, but just sharing as it is something I came across.

escape-string-regexp known bugs