shadaj/slinky

Everything about Slinky -- issues, ideas for features, where it's being used, and more

Joan Goyeau

@joan38

@mcallisto In my project I have:

  @JSImport("./images/argus-logo.svg", JSImport.Default) @js.native
  object ArgusLogo extends js.Object

And that file is in src/main/js/images/argus-logo.svg

And my webpack config contains:

module.exports = {
  module: {
    rules: [
      { test: new RegExp("\\.css$"), use: ["style-loader", "css-loader"] },
      { test: new RegExp("\\.(svg|png|jpg|gif)$"), use: "file-loader" }
    ]
  }
}

Took me some time to figure this out but works great

mcallisto

@mcallisto

Took me some time to figure this out but works great

@joan38 thank you! I have been helped to find a somehow simpler solution, identifying the correct relative dir (in relation to target). I will add it to a demo and post here the details.

mn98

@mn98

@shadaj @joan38 I've been using Play+Slinky so I'm curious to understand how you do all the routing/json/sse/streaming between the client and server with just Slinky. Or have I misunderstood and there is no jvm 'server' in this case?
I'm quite new to JS app dev generally so please feel free to spell out the obvious to me!

Ramnivas Laddad

@ramnivas

@mn98 We don't use Play, but based on our experience, routing will be handled in client (we use React Router). In our case, the server (written in Scala) simply provides the API (a mix of REST and GraphQL); the client is otherwise disconnected from the server implementation.

You can see more details in https://www.youtube.com/watch?v=pBtsgex2gUE and https://www.youtube.com/watch?v=G4GQIbzMfjU

mn98

@mn98

@ramnivas thanks very much, I shall do some homework!

František Kocun

@fokot

@mn98 or you can use https://github.com/lihaoyi/autowire if you want to call scala function in code which in reality will be call to server

Pascal Mengelt

@pme123

I was wondering if there is an example with the following 'features':

sbt multi-modules (server / client / shared)
using a CSS library like Semantic-UI
using REST-APIs and Websockets
Examples or Projects that use parts of my list are of course also welcome;).

2 replies

Gabor Juhasz

@gjuhasz86

hi, is there a way to create a component that has a generic type parameter?

@react class MyComponent[T] extends Component { ... }

Pascal Mengelt

@pme123

small bug in documentation ( https://slinky.dev/docs/the-tag-api/ )?

input(onChange := (event) => {
  println("the value of this input element was changed!")
})

does not work - this works:

input(onChange := (event => {
        println(s"the value of this input element was changed!")
      }))

Only difference are the parentheses.

Peter Storm

@peterstorm

Can we use Webworkers in Slinky?

Ramnivas Laddad

@ramnivas

Yes, you may.

Gabor Juhasz

@gjuhasz86

hi, is there anything special needed to get onKeyPress working? Looks like it never gets called.
https://scalafiddle.io/sf/qJcjX5e/18 (couldn't make it work locally either)

Ramnivas Laddad

@ramnivas

If you change your element to input, it works fine (unless the element has focus, it won't receive any key events):

      input(
        onClick:= (_ => println(s"MOUSE")),
        onKeyPress:= (_ => println(s"KEYBOARD"))
      )

Also, onKeyPress is deprecated (but works), so you should be using onKeyDown (https://developer.mozilla.org/en-US/docs/Web/API/Document/keypress_event)

Gabor Juhasz

@gjuhasz86

Thanks, although it looks like even input only fires the keyPress/keyDown events when it is focused. That's not really feasible for my use case.

Pascal Mengelt

@pme123

Hi, I write a blog, translating the intro tutorial of react to Slinky. Before I publish it, I thought to get some feedback from Slinky cracks;).

Alexis Hernandez

@AlexITC

Is there any example for functional components depending on generic types? apparently, def component[D] = FuncionalComponent[Props[D]] {...} is not enough

@react must annotate:
[error]   - a class that extends (Stateless)Component,
[error]   - an object that extends ExternalComponent(WithAttributes)(WithRefType)
[error]   - an object defining a `val component = FunctionalComponent(...)`
[error]   @react class RemoteDataLoaderComponent {

I have tried some variations without luck

Alexis Hernandez

@AlexITC

correction, my only approach until now is defining a base trait that uses the generic type, requiring to extend such component every time, I'd like to get to use functions only:

trait RemoteDataLoaderBase[D] {
  case class Props(fetcher: () => Future[D], render: D => ReactElement)

  val theComponent: FunctionalComponent[Props] = FunctionalComponent[Props] { ...}
}

@react object MyProductsSummaryLoader extends RemoteDataLoaderBase[GetTrackedProductsResponse] {
  val component = theComponent
}

Alexis Hernandez

@AlexITC

Another question, I'm struggling to force a refresh for the whole component, given react-faq, something as simple as this custom hook should be enough, but for some reason, it isn't, I have added debug logs, and the counter gets updated properly but the component isn't rendered again as expected:

  def forceRefresh() = {
    val (_, increment) = Hooks.useReducer[Int, Int](_ + _, 0)
    () => increment(1)
  }

Ramnivas Laddad

@ramnivas

@AlexITC We use https://github.com/kladdad/use-slinky-hooks/blob/master/src/main/scala/com/payalabs/slinky/hooks/GenericHooks.scala#L24

Alexis Hernandez

@AlexITC

thanks, it's basically the same as what I posted, I think my problem relates to a component that uses the Hooks.setEffect(..., ""), which prevents the effect from running multiple times, unfortunately, I have no idea how to force such effect to run again without getting in executed indefinitely

Shadaj Laddad

@shadaj

@pme123 just took a look at your blog post, and it looks great! It's awesome to see how easy it was to port some JavaScript code to Scala.js with Slinky!

Alexis Hernandez

@AlexITC

Anyway, I ended up writing this: https://github.com/wiringbits/cazadescuentos/blob/master/lib/ui/src/main/scala/net/wiringbits/cazadescuentos/ui/components/RemoteDataLoaderBase.scala

I'm not 100% happy with the solution but it works, thanks for the help

Pascal Mengelt

@pme123

@shadaj yeah really great work you and the Slinky community did -keep up the excellent work:). By the way I saw that the link not works anymore - here is the published one:
https://pme123.medium.com/slinky-doing-react-the-scala-way-f78ccf42bf8f

Peter Storm

@peterstorm

Is there anything wrong with just depending on a CSS framework by getting it in the index.html file, and then just adding classes in the code?

Peter Storm

@peterstorm

Im trying to use the ScalablyTyped plugin for typescript types, but it hangs on trying to build the standard library or something?

Phase3Compile.scala:125 Building C:\Users\phn.ivy2\local\org.scalablytyped\std_sjs1_2.13\4.0-34aa7a\jars\std_sjs1_2.13.jar... [thread => 177, project => conn...

Anyone have experience with that? It's been going for ages and complains about spending too much time garbarge collecting

Im using sbt

Alexis Hernandez

@AlexITC

You need to increase the memory, latest versions need a lot, this worked for me, create .sbtopts with

-J-Xmx4G
-J-XX:MaxMetaspaceSize=4G
-J-XX:+CMSClassUnloadingEnabled

Peter Storm

@peterstorm

Thanks that worked!

Pascal Mengelt

@pme123

Is there an example on how to integrate JavaScript code that is not a React Component? According to the doc are External Components just for them.
I have the following I want to use with Slinky. Using External Components did not work.

import Modeler from 'bpmn-js/lib/Modeler';

const modeler = new Modeler({
  container: $modelerContainer,
  moddleExtensions: {
    custom: customModdleExtension
  },
  keyboard: {
    bindTo: document.body
  }
});

nafg

@nafg

@pme123 just refer to regular scala.js docs

Pascal Mengelt

@pme123

@nafg - thanks I found my problem - see https://stackoverflow.com/questions/64740345/how-to-translate-javascript-class-to-scalajs/64741174#64741174

Peter Storm

@peterstorm

Is it possible to import an scss file and use the classes defined in that?

Peter Storm

@peterstorm

Is it just like example app, where you just import it as an js object, and make the styles available via a private val?

Peter Storm

@peterstorm

And how do I do an aria-hidden, I can see there's a WithDash class, but I'm unsure of the syntax

Peter Storm

@peterstorm

Ah it was in the docs

But I get this error when I try to do it to an svg tag:

type mismatch;
 found   : slinky.core.AttrPair[slinky.web.html._aria_attr.type]
 required: slinky.core.TagMod[slinky.web.svg.svg.tag.type]

Peter Storm

@peterstorm

Hmm does sass loading even work in scala JS / slinky?

Peter Storm

@peterstorm

Ok, figured out the sass part, but still dont understand the type mismatch above

Mardo Del Cid

@mardo

Hi Guys, I think 0.6.6 doesn’t come with IntelliJ support. I’m testing on IntelliJ 2020.2.3. 0.6.5 works for me though.

Peter Storm

@peterstorm

No one able to help with this please?

Error is this: type mismatch; found : slinky.core.AttrPair[slinky.web.html._aria_attr.type] required: slinky.core.TagMod[slinky.web.svg.svg.tag.type]

nafg

@nafg

Just a guess, are you missing an import?

scalajs-react has similar types and it relies on an implicit, which means you need a certain import

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