Don’t register storage event listener in Node.js environments

[hanspagel]

This PR

1. Checks if it’s running in a browser context.
2. Only then registers the storage event listener in the LocalStoragePolyfill.

Merging this PR would make y-websocket run in Node.js environments, see yjs/y-websocket#51 yjs/y-websocket#55

Alternative solutions

1. It doesn’t make sense to use the LocalStoragePolyfill in Node.js environments at all. A check to load the Polyfill only in a browser context would probably work too.
2. Add for example node-localstorage to add support for localstorage to Node.js.

Let me know if you I can do anything to improve the PR. 💖

[dmonad]

Hey @hanspagel ,

Thanks for the PR! I want to leave the option open to implement an actual storage polyfill for nodejs. So I went with a slightly different approach and added a global event listener storage.onChange(event => ..) that should be used instead. Hope this works for you. I closed the related issues in y-websocket already. Let me know if there are still issues.

The issue is fixed in lib0@v0.2.41.