ports

JavaScript interop with Elm

This is an example of passing messages from Elm to JavaScript and backwards.

It sends a hole () or empty Tuple to JavaScript, as a message and retrieves a numeric value.

Inspired by [Trouble Connecting Ports and Subscriptions] question

See more on the matter in the official docs for [JavaScript Interop] ports

Building the example

Since this example features port module, it is impossible to build it with elm-reactor

You have to explicitly specify the --output=index.js

Depends on Cmd.Extra

$ elm-package install -y
$ elm-make Main.elm --output=index.js