CSS.unescape ?

Nobody has claimed this yet.

👋 folks! I know it might be the wrong place to ask, but someone else might be searching this repo too in the future. What would be the reverse operation? I’m looking for something like this:

```js
const original = 12345;

const unescape = () => { /* ?? */ };

expect(unescape(CSS.escape(original))).toEqual(original)
```

Relevant question on StackOverflow: https://stackoverflow.com/q/64273537/1818285

Package with exact name match: https://www.npmjs.com/package/css.unescape (suspiciously no weekly downloads).

My use case: take something like:
- `url(some-escaped-url)`
- `url('some-escaped-url')`
- `url("some-escaped-url")`

and reliably extract URL value from such input.

The issue centers on the CSS.escape entry point in this JavaScript polyfill; begin by comparing its behavior with the CSSOM definition and the linked Stack Overflow question. Define what “done” means for reversing escaped values, including the three url(...) forms, before deciding whether a repository change is in scope.

Written by the indexing model from the issue text.