Owlet is a Typed Spreadsheet UI library for ScalaJS. It is built on top of Monix and Typelevel Cats to combine predefined input fields to a reactive user interface, just like what you would done in spreadsheet. Owlet is inspired by the PureScript library Flare.

Do one thing and do it well micro birds library series

libraryDependencies += "us.oyanglul" %%% "owlet" % "<maven version>"

resolvers += "jitpack" at "https://jitpack.io"
libraryDependencies += "com.github.jcouyang" % "owlet" % "<jitpact version>"

import us.oyanglul.owlet._
import DOM._
val a1 = number("a1", 1)
val a2 = number("a2", 2)
val a3 = number("a3", 3)
val sum = fx[List, Double, Double](_.sum, List(a1, a2, a3))
render(a1 &> a2 &> a3 &> sum, "#app")

or

val a1 = number("a1", 1)
val a2 = number("a2", 2)
val a3 = number("a3", 3)
val sum = a1 |+| a2 |+| a3
renderOutput(sum, "#app")

You know spreadsheet is 2D, when we have monad, it became 3D

!!!Monad Warning!!!

val numOfItem = int("noi", 3)
val items = numOfItem
  .flatMap(
    no => (0 to no).toList.parTraverse(i => string("inner", i.toString))
  )

• imagine that numOfItem lives in dimension (x=1, y=1, z=0)
• then items live in dimension (x=1,y=1,z=1)

you can render either numOfItem or items seperatly, for they live in diffenrent z axis (which means render items you won't able to see numOfItem even it's flatMap from there

but you can some how connect the dots with magic &>

renderOutput(numOfItem &> items, "#output")

Anyway, just keep in mind that monad ops map ap flatMap... will lift your z axis parMap parAp parXXX instead, will keep them in the same z axis

• Tutorial
• Tweaking Owlet with Lens
• Todo MVC Completed
• API Doc