Forget CSS and enjoy creating UIs in pure Elm

[nelsonic]

https://korban.net/posts/elm/2019-11-17-elm-ui-introduction/ a superb intro to Elm UI by @alexkorban
https://ellie-app.com/3TdcKSPxMv5a1

[nelsonic]

https://youtu.be/Ie-gqwSHQr0

[nelsonic]

Seriously thinking of buying this book: https://korban.net/elm/book/

@SimonLab Qu'est-ce que tu penses ?

[SimonLab]

The most interesting aspect are the ones linked UI and css but it's also always good to refresh and read other explanation for topic we are already comfortable with.
Also money back guarantee if not happy.

[nelsonic]

The book source code is Elm version 0.19.0. I have Elm 0.19.1 installed and get the following error:

Attempted to update the version of elm in elm.json to 0.19.1 ...
elm make src/Main.elm appears to work:

Starting downloads...

  ● elm/regex 1.0.0
  ● mdgriffith/elm-ui 1.1.0
  ● rtfeldman/elm-validate 4.0.1
  ● elm/random 1.0.0
  ● elm/json 1.1.2
  ● elm/bytes 1.0.3
  ● elm-explorations/test 1.2.0
  ● elm/file 1.0.1

Dependencies ready!
Success! Compiled 12 modules.

    Main ───> index.html

But attempting to open the resulting index.html file gives the following error:

Initialization Error
Error: Problem with the flags given to your Elm program on initialization.

Problem with the given value:

undefined

Expecting an OBJECT with a field named `sessionId`

[nelsonic]

Downgraded to Elm 0.19.0:

npm install -g elm@elm0.19.0

Re-compiled:

elm make src/Main.elm
Starting downloads...

  ● mdgriffith/elm-ui 1.1.0
  ● elm/regex 1.0.0
  ● elm-explorations/test 1.2.0
  ● rtfeldman/elm-validate 4.0.1

Dependencies ready!
Success! Compiled 12 modules.

Attempt to open the resulting index.html file:

Fail. 😞