[timwis]

Hey, I'm a JS dev who's been splashing around in rails for the past year or so. I'm happy to help! I just had a similar issue this morning, and I asked in the Ruby on Rails Link slack [1]. They're pretty helpful in there.

For what it's worth, my issue was that Heroku was running `rake assets:precompile` without node_modules being installed. This was because `yarn install` failed. I looked closely at the logs and saw an error about the yarn file needing to be updated (the lockfile pins exact versions). So I ran `yarn install` locally to update it, redeployed, and it worked. So far I've been able to use node modules with sprockets this way just fine (in JS and Sass). Webpack-generated JS bundles work well too. Anyway, happy to help in there, just tag me :)

[1] https://www.rubyonrails.link/

[arthurcolle]

Thank you @timwis, that room looks great.

And yes, I experienced the same issue you discussed! That has helped in the past a few times. I wonder what the advantage is to precompiling as opposed to doing it at build time during the deploy step.