andrewmacmurray / elm-simple-animation Goto Github PK
View Code? Open in Web Editor NEWstateless animation utils for Elm
Home Page: https://package.elm-lang.org/packages/andrewMacmurray/elm-simple-animation/latest/
License: MIT License
stateless animation utils for Elm
Home Page: https://package.elm-lang.org/packages/andrewMacmurray/elm-simple-animation/latest/
License: MIT License
Could be nice to have an option to make an animation yoyo back to it's first frame
For something like this animation:
Instead of writing:
pulseOpacity : Animation
pulseOpacity =
Animation.steps
{ startAt = [ P.opacity 1 ]
, options = [ Animation.loop ]
}
[ Animation.step 800 [ P.opacity 0 ]
, Animation.step 800 [ P.opacity 1 ]
]
You could have a shorthand like:
pulseOpacity : Animation
pulseOpacity =
Animation.fromTo
{ duration = 800
, options = [ Animation.loop, Animation.yoyo ]
}
[ P.opacity 1 ]
[ P.opacity 0 ]
A few of the code examples have things like P.x
in them. I had no idea what this was until I opened up the documentation on elm-packages and saw that one of the modules is Simple.Animation.Property
. From there I inferred that P was an alias for Simple.Animation.Property
.
I think it would be easier if, for example,
animatedDot : Html msg
animatedDot =
Animated.div expandFade [ class "dot" ] []
expandFade : Animation
expandFade =
Animation.fromTo
{ duration = 2000
, options = [ Animation.loop ]
}
[ P.opacity 1, P.scale 1 ]
[ P.opacity 0, P.scale 2 ]
was instead
import Simple.Animated as Animated
import Simple.Animation as Animation
import SimpleAnimation.Property as P
animatedDot : Html msg
animatedDot =
Animated.div expandFade [ class "dot" ] []
expandFade : Animation
expandFade =
Animation.fromTo
{ duration = 2000
, options = [ Animation.loop ]
}
[ P.opacity 1, P.scale 1 ]
[ P.opacity 0, P.scale 2 ]
Have been meaning to do this for ages! Adding an Animated.elmCss
helper would cover a lot of the common Html
packages elm folks use.
A lot of the thought has been done in #20, so ideally the helper would look something like this:
import Html.Styled as Htmls
import Html.Styled.Attributes as Attr
import Simple.Animation exposing (Animation)
import Simple.Animation.Animated as Animated
animatedStyleNode :
(List (Htmls.Attribute msg) -> List (Htmls.Html msg) -> Htmls.Html msg)
-> Animation
-> List (Htmls.Attribute msg)
-> List (Htmls.Html msg)
-> Htmls.Html msg
animatedStyleNode =
Animated.elmCss
{ text = Htmls.text
, node = Htmls.node
, class = Attr.class
}
It could be nice to have a way to fire events when an animation or transition finishes - a recent example from the elm slack was animating something before a page transition.
One way of doing this could be to use the browser's animationend
/ transitionend
events https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/animationend_event
Here's a minimal example of that approach - https://ellie-app.com/cZPWSKSXcPZa1
Things I'd like to find out before anything like this gets added:
elm-ui
and svg
wrappers?This is created as a discussion for PR #14 .
I thought that adding Animation.empty would make it easier to match either no animation or some animation depending on the model.
My thinking is
animatedEl
( if shouldAnimate then
expandFade
else
Animation.empty
)
@andrewMacmurray mentioned that he usually makes conditional animations like:
if shouldAnimate then
Animated.div expandFade [] [ element ]
else
element
(For understanding both use the expandFade animation from the docs.)
In my opinion both work just fine (Andrew's might be slightly more performant, but I haven't tested it, but I can't imagine it is but much ). I just like the flexibility of being able to drop in an empty animation because both "Do I want this element to animate or not" and "Do I want an animated element or not" now have direct answers.
I'm interested what others think?
Thanks!
Also I am curious, should the name be Animation.empty
because that is what the code is doing, or should it be Animation.none
because that is what the intent is?
A few people have struggled to setup an elm-ui
example when starting out with the library, this could be a sign that the docs aren't clear enough.
Some ideas:
Any other ideas, thoughts are welcome!
First of all, thanks for this Andrew.
I want to share some code that I think It's working for me.
Please consider (after making any changes you think necessary) making it available for others on the wiki, or readme or any where you see fit.
I know you give concise instructions about this, in the documentation.
But having this code available, might save some time and make it easy to adopt this package.
The code is about using Simple.Animation.Animated.custom
with the packages: rffeldman/elm-css
and matheus23/elm-default-tailwind-modules
.
Here is it:
import Html.Styled as Htmls exposing (Html, div, text)
import Html.Styled.Attributes as Attr exposing (class, css)
import Tailwind.Utilities as Tw
animaStyleNode :
(List (Htmls.Attribute msg) -> List (Htmls.Html msg) -> Htmls.Html msg)
-> Animation
-> List (Htmls.Attribute msg)
-> List (Htmls.Html msg)
-> Htmls.Html msg
animaStyleNode node animation attributes children =
Animated.custom
(\className stylesheet ->
node
(class className :: attributes)
(Htmls.node
"style"
[]
[ text stylesheet ]
:: children
)
)
animation
htmlsExample : Htmls.Html msg
htmlsExample =
animaStyleNode div
flash
[ css [ Tw.text_white, Tw.text_center, Tw.mx_4, Tw.p_6 ] ]
[ text "I'm animating!" ]
flash : Animation
flash =
Animation.steps
{ startAt = [ P.opacity 0, P.backgroundColor "#0382c8" ]
, options = [ Animation.loop ]
}
[ Animation.step 1000 [ P.opacity 1, P.backgroundColor "rgb(19 228 187)" ]
, Animation.step 1000 [ P.opacity 0, P.backgroundColor "#0382c8" ]
]
I think this way of styling (with tailwindcss) is gaining momentum.
A am also very interested in seeing what changes you would make to the code.
Regards,
Given that Simple.Transition
is in the process of being added in #8 it might be nice to have a shared space for the extended eases (e.g. all the ones that make use of Cubic
) so that both Animation
and Transition
can use them
I only just thought of this after I published 1.0.0
๐คฆ but using a record to inject external dependencies (like for elm-ui
https://package.elm-lang.org/packages/andrewMacmurray/elm-simple-animation/latest/Simple-Animated#UiOptions) could be a nice, low mental overhead pattern to use for other ones
So Simple.Animated.svg
would become:
animatedSvg =
Simple.Animated.svg
{ class = Svg.Attributes.class
}
It could be nice to include a module to leverage CSS transitions nicely from elm
Perhaps something like:
transition : Html.Attribute msg
transition =
Transition.all
{ duration = 500
, options = [ Transition.delay 100 ]
}
[ Transition.opacity
, Transition.color
]
transitionCustom : Html.Attribute msg
transitionCustom =
Transition.properties
[ Transition.opacity 200 [ Transition.delay 100 ]
, Transition.color 500 [ Transition.easeInOut ]
]
A very common pattern in web-uis is to have sortable / filterable collections. These often need some reasonably complex state machinery to animate them.
I wonder if it could be nice to come up with a few examples and see if there are any common patterns that could be extracted into collection helpers.
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