README.md

London Air UI

A user interface for viewing air quality data from London Air, built with Elm 0.19.1 and Leaflet JS.

A live version of the app can be found at https://london-air-ui.ams3.cdn.digitaloceanspaces.com/index.html.

Build

Development

From the root directory, run:

elm make src/Main.elm --output elm.js

In index.html, replace the following tag:

<script src="https://london-air-ui.ams3.cdn.digitaloceanspaces.com/elm.min.js.gz"></script>

with:

<script src="elm.js"></script>

Then, point your favourite browser to the location of index.html. Don't forget to undo this change before releasing to production!

Production

From the root directory, build the application with:

elm make src/Main.elm --output elm.js --optimize

Minify the resulting elm.js file with:

uglifyjs elm.js -o elm.min.js

If running this command for the first time, you may need to install uglify with npm install -g uglify-js.

Finally, compress the resulting elm.min.js file with:

gzip -k elm.min.js

Upload the resulting elm.min.js.gz to DigitalOcean spaces or similar. Don't forget to enable the CDN feature on your bucket and to configure your object metadata to include the following headers:

• Content-Type: application/javascript
• Content-Encoding: gzip