Elm 0.19 actually also has a time travel debugger. Alas there is an issue with external packages.

There is a PR for that already, but it has not yet been merged: https://github.com/elm/compiler/pull/1850

At CurrySoftware we run a fork of the Elm compiler which merges this PR and has a feature to use ports and the debugger with `elm reactor`: https://github.com/CurrySoftware/compiler

And an example how to use it here: https://github.com/CurrySoftware/elm-reactor-example

Is there any work being done to get it working again? More broadly, is there any way to know what is actually being worked on with Elm? The language is amazing but it feels left for dead sometimes. Yet there seems to be a decent amount of activity on GitHub, so it clearly hasn't been: https://github.com/elm/compiler/commits/master

The best way to stay in touch is the slack, where most of the activity can be seen https://elmlang.slack.com/

The elm-dev channel contains most of the info coming from Evan :). I had the same feeling as you until I discover this.

It seems like the fix is in the making, and could be out in a few weeks.

Meanwhile, there is a forked version of the compiler with a hotfix for the debugger that works for most applications, even medium and large ones: https://github.com/elm/compiler/pull/1850

I use in Elm 0.19 and it works just fine. Maybe it’s some JavaScript port?