Shpadoinkle-debug: Debugging tools for Shpadoinkle applications.

[ bsd3, library, web ] [ Propose Tags ]

Shpadoinkle tooling is a work in progress. But some useful functions have already emerged. This repo centeralizes these functions, and will house future work on more robust tooling, such as time travel debugging.

[Skip to Readme]
Versions [faq]
Change log
Dependencies aeson, base (>=4.12.0 && <4.16), jsaddle (>=0.9.7 && <0.20), lens, text, unliftio [details]
License BSD-3-Clause
Author Isaac Shapira
Category Web
Source repo head: git clone
Uploaded by fresheyeball at 2020-06-21T22:06:27Z
Distributions NixOS:
Downloads 37 total (37 in the last 30 days)
Rating (no votes yet) [estimated by Bayesian average]
Your Rating
  • λ
  • λ
  • λ
Status Hackage Matrix CI
Docs uploaded by user [build log]
All reported builds failed as of 2020-06-21 [all 1 reports]


[Index] [Quick Jump]


Maintainer's Corner

For package maintainers and hackage trustees

Readme for Shpadoinkle-debug-

[back to package description]

Shpadoinkle Debug

Goldwater BSD-3 built with nix Hackage Hackage Deps Hackage CI

This package exposes some useful debugging functions for tracing the state of Shpadoinkle applications as they change over time. It exposes 2 type classes currently.

class LogJS (c :: Type -> Constraint) where
  logJS :: c a => a -> JSM ()

class LogJS c => Trapper c where
  trapper :: c a => JSContextRef -> a -> a

These are intended to by used with TypeApplications, so you can choose the means of conversion before passing to console.log. For example:

main :: IO ()
main = runJSorWarp 8080 $ do
  ctx <- askJSM
  simple runParDiff initial (view . trapper @ToJSON ctx) getBody

Will log all state by first encoding to JSON with Aeson, then then logging with JSON.parse so the browser console has the nice native display. If we change it to trapper @Show ctx it will use the Show instance instead.