When I start a new project meant for production, I need to evaluate whether to use Elm or something else. Elm is good and gives a lot, so I am willing to put up with some workaround and the occasional reimplementation of a smaller JS library. But what are the real dealbreakers? What are the thing…

I have no skin in your game, so take my answers with a grain of salt. [image] xarvh: Large codebases: a breaking change in a library means that the whole app must be upgraded in one go; if the codebase is large enough this might not be possible. Beyond a certain size, the compiler may become sl…

[image] xarvh: Beyond a certain size, the compiler may become slow or very memory hungry. I have been generating code for AWS APIs, and since AWS have a lot of APIs, I ended up with a lot of Elm code. I should really repeat this experiment as it has been a while… I found that the 0.19.1 compi…

[image] xarvh: Lack of asynchronous code loading. Elm static typing does not really allow for coding in extensible ways - not like in OO programming where runtime plugins are commonplace. Javascript certainly allows for this. The ways I think you could do it with Elm, are to have multiple se…

[image] xarvh: Slow bug fixing. I ran into an issue yesterday when trying to publish a package, but it failed to load the docs of the previous build to run elm diff against. The docs are fine, apparently this is a bug introduced in 0.19.1, in rare circumstances it failes to decode its own doc…

I’d second @Philip_Krueger about breaking changes. I’ve done large (thousands of lines of code) refactors is React, Ember, and Elm. Elm was by far the easiest. I personally have yet to find a JS library I couldn’t use with any of my Elm projects. I also know multiple ways to hack around interop wit…

Reasons to use Elm: It’s type system will make you design better code; it’s libraries are well-designed; and it works amazingly well for re-factoring large projects. Reasons not to use Elm in production (you more or less covered them but I want to emphasize their potential effects): It can be com…

On the topic of compile times, Elm should be pretty fast! I tried to gather some numbers on it in this repo . Notable data points include: Lines Build From Scratch Median Incremental Build 136,049 2454ms 638ms 278,803 4059ms 825ms There are some outliers in the data, like this one , whe…

[image] evancz: P.S. I have not heard of object files getting so big that they wouldn’t fit on the heap! Not til @rupert mentioned it here! I believe adding something like +RTS -A512m -RTS will let you increase the heap size as he says though. I should definitely repeat my experiment and repo…

[image] rupert: I have been generating code for AWS APIs, and since AWS have a lot of APIs, I ended up with a lot of Elm code. I Is that this repository ?

@Philipp_Krueger I’ve heard there are some problems with extensions, too, e.g. grammarly. I think that’s also the case for other vdom approaches (e.g. React). This is very interesting, I didn’t know about it. Could you point me to some resources on the topic? @rupert The ways I think you coul…

When should I not use Elm in production?

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Philipp_Krueger August 19, 2020, 7:33am 12

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When should I *not* use Elm in production?

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When should I not use Elm in production?