Here's a mini-example for posterity 
http://jsbin.com/hipeba/edit?html,css,js,output

On Tuesday, October 4, 2016 at 8:37:57 PM UTC+2, Joaquín Oltra wrote:
>
> elm-style-animation is great, but if you want simple fade-in fade-out 
> effects the best way is to toggle classes in the html and use css 
> animations, or transitions.
>
>
> https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Animations/Using_CSS_animations
> https://css-tricks.com/snippets/css/keyframe-animation-syntax/
>
> You'll avoid having animation state and a lot of animation related code 
> and they can be very efficient when used with transforms or opacity.
>
> That said if you need advanced animation techniques like interrupting, 
> staggering, queueing, or spring systems, then go with elm-style-animation, 
> it is great.
>
> On Tuesday, October 4, 2016 at 7:04:15 PM UTC+2, Rex van der Spuy wrote:
>>
>> It works!!! :)
>> Thanks so much for walking me through it (and thanks again for a 
>> fantastic library!)
>>
>> I do a *lot* of these sorts of these simple transitions so it's 
>> definitely been worth the effort to get this up and running.
>>
>> On Tuesday, October 4, 2016 at 10:30:37 AM UTC-4, Matthew Griffith wrote:
>>>
>>> Oh!  You need to add the animation subscription as well.
>>>
>>> Sub.batch this with your current subscriptions
>>>
>>> subscriptions : Model -> Sub Msgsubscriptions model =
>>>     Animation.subscription Animate [ model.storyTextStyle ]
>>>
>>>
>>> On Tuesday, October 4, 2016 at 9:28:25 AM UTC-4, Rex van der Spuy wrote:
>>>>
>>>> Thanks Mathew!!
>>>> I've added your code suggestion, but so far no luck yet (FadeInOut is 
>>>> called, but not SendStoryComponents)
>>>>
>>>> If anyone wants to take a look at the current Main.elm file where all 
>>>> this code is running, it's here:
>>>>
>>>> https://gist.github.com/kittykatattack/f05b42efc6ecf09ddf244bbafd18edb3
>>>>
>>>>
>>>> On Monday, October 3, 2016 at 5:24:43 PM UTC-4, Matthew Griffith wrote:
>>>>>
>>>>> In your `Animate animMsg` area, you're not returning the cmds, which 
>>>>> is how the msg is fired :).
>>>>>
>>>>> Change your code to this:
>>>>>
>>>>> Animate animMsg ->
>>>>>       let 
>>>>>         (newStyle, cmds) = 
>>>>>           Animation.Messenger.update
>>>>>             animMsg
>>>>>             model.storyTextStyle
>>>>>       in
>>>>>      ( { model
>>>>>             | storyTextStyle = newStyle
>>>>>        }
>>>>>      , cmds
>>>>>     )
>>>>>
>>>>>
>>>>>
>>>>> On Monday, October 3, 2016 at 2:09:57 PM UTC-4, Rex van der Spuy wrote:
>>>>>>
>>>>>> Thanks everyone, I like these ideas!
>>>>>>
>>>>>> Here's what I've got so far - but it's not working... yet! :) 
>>>>>> Could any of you with more experience with elm-style-animation let me 
>>>>>> know what I'm doing wrong?
>>>>>>
>>>>>> I've imported Animation and Animation.Messener, exposing State:
>>>>>>
>>>>>> ```
>>>>>> import Animation
>>>>>> import Animation.Messenger exposing (State)
>>>>>> ```
>>>>>>
>>>>>> I created a style for my text called `storyTextStyle`
>>>>>>
>>>>>> ```
>>>>>>  , storyTextStyle : Animation.Messenger.State Msg
>>>>>>
>>>>>> , storyTextStyle = 
>>>>>>       Animation.style
>>>>>>         [ Animation.opacity 1.0
>>>>>>         ]
>>>>>>
>>>>>> ```
>>>>>> I added it to the view, which displays my story output text
>>>>>>
>>>>>> ```
>>>>>> div [ storyCardStyle ] 
>>>>>>             [ p ( Animation.render model.storyTextStyle ++ [ 
>>>>>> storyParagraphStyle ]) [ text model.storyOutput ] ]
>>>>>> ```
>>>>>>
>>>>>> I have an MDL button that triggers a `FadeInOut` update message:
>>>>>>
>>>>>> ```
>>>>>> , Button.onClick FadeInOut
>>>>>> ```
>>>>>>
>>>>>> The `FadeInOut` message and `Animate` message are in the `update` 
>>>>>> function:
>>>>>>
>>>>>> ``` 
>>>>>> Animate animMsg ->
>>>>>>       let 
>>>>>>         (newStyle, cmds) = 
>>>>>>           Animation.Messenger.update
>>>>>>             animMsg
>>>>>>             model.storyTextStyle
>>>>>>       in
>>>>>>      { model
>>>>>>          | storyTextStyle = newStyle
>>>>>>      }
>>>>>>      ! [ ]
>>>>>>
>>>>>>     FadeInOut -> 
>>>>>>       let
>>>>>>         newStyle =
>>>>>>           Animation.interrupt
>>>>>>             [ Animation.to [Animation.opacity 0]
>>>>>>             , Animation.Messenger.send SendStoryComponents
>>>>>>             , Animation.to [Animation.opacity 1]
>>>>>>             ]
>>>>>>             model.storyTextStyle
>>>>>>       in
>>>>>>       { model
>>>>>>           | storyTextStyle = newStyle
>>>>>>       }
>>>>>>       ! [ ]
>>>>>> ```
>>>>>>
>>>>>> ... all this compiles and I've tested `FadeInOut` with Debug.crash to 
>>>>>> make sure it's called - and it is definitely being called when I click 
>>>>>> the 
>>>>>> button.
>>>>>> But, my `SendStoryComponents`, which generates the new text to fade 
>>>>>> is, is never called.
>>>>>> Here's `SendStoryComponents` (it uses a port that does some fun stuff 
>>>>>> with nlp-compromise.js to generate a random story based on user input 
>>>>>> and 
>>>>>> story templates)
>>>>>>
>>>>>> ```
>>>>>> SendStoryComponents ->
>>>>>>       let
>>>>>>         words = 
>>>>>>           model.words
>>>>>>
>>>>>>         toList string =
>>>>>>           String.Extra.clean string
>>>>>>           |> String.split " "
>>>>>>
>>>>>>
>>>>>>         words' =
>>>>>>           { places = toList model.places 
>>>>>>           , livingThings = toList model.livingThings
>>>>>>           , objects = toList model.objects
>>>>>>           , actions = toList model.actions
>>>>>>           , moods = toList model.moods
>>>>>>           }
>>>>>>
>>>>>>         model' =
>>>>>>           { model 
>>>>>>               | words = words'
>>>>>>           }
>>>>>>       in
>>>>>>       (model', sendStoryComponents(model'.words, 
>>>>>> StoryTemplates.stories))
>>>>>> ```
>>>>>> (`SendStoryComponents` does work, if I don't call it through the 
>>>>>> `FadeInOut` message.)
>>>>>>
>>>>>> Can anyone tell by looking at that why `Animation.Messenger.send` 
>>>>>> might not be calling `SendStoryComponents` ?
>>>>>>
>>>>>

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