document is undefined when importing Mouse

[jweissman]

Really putting this here just in case someone else might run into this -- if you're importing something that does an import Mouse somewhere, you'll get a ReferenceError: document is not defined sort of crash message from JS, although the REPL doesn't crash -- it just hasn't imported the module.

Maybe it's possible to catch the case where a user is loading something that requires document and warn the user? Or conversely we could provide a null object kind of document that the repl can use just to import the module.

---

After import Mouse, or importing anything that does, we get a JS stacktrace that looks something like this:

/.../etc/elm/project/repl-temp-000.js:6812
        onDocument: F3(on(document)),
                          ^

ReferenceError: document is not defined
    at /../etc/elm/project/repl-temp-000.js:6812:20

[process-bot]

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[evancz]

Should be fixed by https://github.com/elm-lang/dom/commit/7ea94b1ee2e7cdfd54bc7cee8e761dba364b31ce and https://github.com/elm-lang/dom/commit/22e3f2f4170e441d318e85a380379655ffeb53c6 which are coming with 0.18. Thanks for the report!

[xpe]

@evancz Thanks for the fix. Can you post a work-around for 0.17? I don't see any Mac builds easily available for 0.18.

[evancz]

It's coming out in the next few days, so just hold on for a little while longer.