1.9 KiB
Sample Miso-JSaddle application
It's possible to build miso applications with ghcid, miso and jsaddle. This can enable a faster workflow due to hot reloading of the code.
This application (sample-app-jsaddle) serves as an example of development w/ GHC, and releases with GHCJS.
To take advantage of the hot reload code features, we recommend running the following command (see below) in a shell. (This will invoke ghcid for you).
Dev
nix-shell --run reload
You should now be able to open your browser to http://localhost:8080 and see your working application. Subsequent edits of the code should cause a live update of the website at that address.
To build the application w/ GHCJS, execute the below command.
Build w/ GHCJS
nix-build -A release
Dev with stack
In order to build miso w/ jsaddle support, it is necessary to remove the existing miso package first.
stack exec -- ghc-pkg unregister --force miso
Enable the jsaddle flag by adding the following to your project's package.yaml file, then call stack build.
flags:
miso:
jsaddle: true
Add external javascript file
First download the external javascript file (your-file.js) to your project directory.
Then add bytestring to build-depends in app.cabal.
In your Main.hs you need to change the implementation of runApp from this:
runApp f =
Warp.runSettings (Warp.setPort 8080 (Warp.setTimeout 3600 Warp.defaultSettings)) =<<
JSaddle.jsaddleOr defaultConnectionOptions (f >> syncPoint) JSaddle.jsaddleApp
to this:
runApp f = do
bString <- B.readFile "your-file.js"
jSaddle <- JSaddle.jsaddleOr defaultConnectionOptions (f >> syncPoint) (JSaddle.jsaddleAppWithJs (B.append (JSaddle.jsaddleJs False) bString))
Warp.runSettings (Warp.setPort 8081 (Warp.setTimeout 3600 Warp.defaultSettings)) jSaddle
Now you should be able to use your-file.js in jsaddle.