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## 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
```bash
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
```bash
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.
```bash
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`.
```yaml
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.