General questions should be asked on StackOverflow, not here. This room focuses on development of Binding.scala.
I'm trying to figure out how to use the binding library in Scala (so without the DOM)
I'm not sure whether you recommend this, but it looks pretty slick since all the listener features are in there
I'd expect it to be something like BindingInstances.bind(Vars(...))(xs => Constant(xs)).. But I can't really get it to react to changes in the Var
Sorry *Vars
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I think you can simply use for/yield on Vars.
val prefix = new Var("ForYield")
val source = Vars(1, 2, 3)
val mapped = (for {
sourceElement <- source
i <- Constants((0 until sourceElement): _*)
} yield {
raw"""${prefix.each} $i/$sourceElement"""
})
mapped.watch()
Note that data-binding is disabled by default. You must call
watch() after you setup all binding expressions.
Hey, and thanks for all the great work. I really like your library as an alternative to all the other reactive frameworks
Hrm.. I really need to read up on my monads.
So a more specific question could be; if I'd like to extract the sequence to perform some calculation on it reactively, how would you do this within your framework? I assume a for..yield isn't going to cut it because there's no way to escape from the monad scope.
This kind of expression is pure because it simply create some new BindingSeq instead of affecting the real world.
However, if I understand your question correctly, you were asking how to change the real world. For Scala.js target, you invoke dom.render to mount a Binding or BindingSeq into a DOM document. For JVM target, you have to create your own SingleMountPoint or MultiMountPoint then invoke watch method on your mount points. In your mount point instance, you will implement some abstract methods to handle data changing events.
Note that these abstract methods are
protected. You have to click Show all button to see them in the scaladoc.
@Jegp FYI
I am new to using Binding.scala and i have just started learning. I really interested and starting to like it. I have some issues where i am stuck, i am not able to figure out about adding a css.file to the main page. I tried all the four ways of adding style/ stylesheet to the page but not able to do it. Second thing is that i have to say fastOptJS, followed by assets and then by assetsTarget everytime i want to compile and run my webpage? How can i write the index.html without the resource generator in the build.sbt. Can you please help me?
@SpringBean Did the tutorial of Scala.js resolve your problem?
@Atry thank you. yes i did try the sbt project style , but it did not work. And how do i add a style sheet to this code for example https://thoughtworksinc.github.io/Binding.scala/#0
@Atry thank you. yes i did try the sbt project style , but it did not work. And how do i add a style sheet to this code for example https://thoughtworksinc.github.io/Binding.scala/#0