to-elm-format-string
Deprecated: AaronCZim/to-multiline-string supports strings better, but it uses native javascript code, so it can't be published.
A quick way to see the model as your programs run. There is only one function, toElmFormatString which turns data into a formatted string with newlines and indentation so you can easily read your model's value.
Just add the line:
Html.pre [][ model |> toElmFormatString |> Html.text ]
to the end of your view function and you'll never wonder what the value of your model is again.