Add -xsource:3

bootstrap4/.js/src/main/scala/io/udash/bootstrap/alert/DismissibleUdashAlert.scala

@@ -1,17 +1,17 @@
 package io.udash.bootstrap
 package alert
 
-import io.udash._
+import io.udash.*
 import io.udash.bindings.modifiers.Binding
 import io.udash.bootstrap.button.{UdashButton, UdashButtonOptions}
 import io.udash.bootstrap.utils.{BootstrapStyles, BootstrapTags}
 import org.scalajs.dom.Element
-import scalatags.JsDom.all._
+import scalatags.JsDom.all.*
+import com.avsystem.commons.SharedExtensions.universalOps
 
 final class DismissibleUdashAlert private[alert](
   alertStyle: ReadableProperty[BootstrapStyles.Color], override val componentId: ComponentId
 )(content: Binding.NestedInterceptor => Modifier) extends UdashAlertBase(alertStyle, componentId) {
-  import io.udash.css.CssView._
 
   private val _dismissed = Property[Boolean](false)
 

bootstrap4/.js/src/main/scala/io/udash/bootstrap/button/UdashButton.scala

@@ -1,17 +1,18 @@
 package io.udash.bootstrap
 package button
 
+import io.udash.*
 import com.avsystem.commons.Opt
-import com.avsystem.commons.misc.{AbstractCase, AbstractNamedEnumCompanion, AbstractValueEnum, AbstractValueEnumCompanion, EnumCtx, NamedEnum, SealedEnumCompanion}
-import io.udash._
+import com.avsystem.commons.misc.AbstractCase
 import io.udash.bindings.modifiers.Binding
 import io.udash.bootstrap.button.UdashButton.{ButtonClickEvent, ButtonTag, UdashButtonJQuery}
-import io.udash.bootstrap.utils._
+import io.udash.bootstrap.utils.*
 import io.udash.wrappers.jquery.{JQuery, jQ}
 import org.scalajs.dom
-import org.scalajs.dom._
+import org.scalajs.dom.*
 import scalatags.JsDom
-import scalatags.JsDom.all._
+import scalatags.JsDom.all.*
+import com.avsystem.commons.SharedExtensions.universalOps
 
 import scala.scalajs.js
 
@@ -41,7 +42,7 @@ final class UdashButton private(
   options: UdashButtonOptions
 )(content: Binding.NestedInterceptor => Modifier) extends UdashBootstrapComponent with Listenable {
 
-  import io.udash.css.CssView._
+  import io.udash.css.CssView.*
 
   override type EventType = ButtonClickEvent
 

bootstrap4/.js/src/main/scala/io/udash/bootstrap/datepicker/UdashDatePicker.scala

@@ -1,16 +1,15 @@
 package io.udash.bootstrap
 package datepicker
 
-import java.{util => ju}
-
-import com.avsystem.commons.SharedExtensions._
+import java.util as ju
 import com.avsystem.commons.misc.{AbstractCase, AbstractValueEnum, AbstractValueEnumCompanion, EnumCtx}
-import io.udash._
+import com.avsystem.commons.SharedExtensions.*
+import io.udash.*
 import io.udash.bootstrap.utils.UdashIcons.FontAwesome
 import io.udash.bootstrap.utils.{BootstrapStyles, BootstrapTags, UdashBootstrapComponent}
 import io.udash.css.{CssStyle, CssStyleName}
 import io.udash.logging.CrossLogging
-import io.udash.wrappers.jquery._
+import io.udash.wrappers.jquery.*
 import org.scalajs.dom.{Element, document}
 
 import scala.scalajs.js
@@ -24,9 +23,8 @@ final class UdashDatePicker private[datepicker](
   override val componentId: ComponentId
 ) extends UdashBootstrapComponent with Listenable with CrossLogging {
 
-  import UdashDatePicker._
-  import io.udash.css.CssView._
-  import scalatags.JsDom.all._
+  import UdashDatePicker.*
+  import scalatags.JsDom.all.*
 
   override type EventType = UdashDatePicker.DatePickerEvent
 

bootstrap4/.js/src/main/scala/io/udash/bootstrap/form/UdashForm.scala

@@ -40,7 +40,7 @@ final class UdashForm private(
 
   override val render: Form =
     form(formStyle)(
-      onsubmit :+= { _: Event => fire(new UdashForm.FormEvent(this, UdashForm.FormEvent.EventType.Submit)); true },
+      onsubmit :+= { (_: Event) => fire(new UdashForm.FormEvent(this, UdashForm.FormEvent.EventType.Submit)); true },
       content(new FormElementsFactory(nestedInterceptor, inputValidationTrigger, selectValidationTrigger, this))
     ).render
 }
@@ -792,7 +792,7 @@ final class FormElementsFactory(
           val validationResult = Property[Option[ValidationResult]](None)
           Seq(
             eventBasedModifiers(validationResult),
-            onblur :+= { _: Event =>
+            onblur :+= { (_: Event) =>
               startValidation(validationResult, triggerGroup = true)
               false
             }

bootstrap4/.js/src/main/scala/io/udash/bootstrap/form/Validator.scala

@@ -30,7 +30,7 @@ object Invalid {
     Invalid(error +: errors)
 
   def apply(error: String, errors: String*): Invalid[ValidationError] =
-    this ((error +: errors).map(DefaultValidationError))
+    this ((error +: errors).map(DefaultValidationError.apply))
 }
 
 trait Validator[-ArgumentType] {

bootstrap4/.js/src/main/scala/io/udash/bootstrap/tooltip/UdashPopover.scala

@@ -46,7 +46,7 @@ object UdashPopover extends TooltipUtils[UdashPopover] {
     new UdashPopover(tp)
   }
 
-  override protected val defaultPlacement = Placement.Right
+  override protected val defaultPlacement: StaticPlacement = Placement.Right
   override protected val defaultTemplate: String = {
     import io.udash.css.CssView._
     import scalatags.Text.all._

bootstrap4/.js/src/main/scala/io/udash/bootstrap/tooltip/UdashTooltip.scala

@@ -46,7 +46,7 @@ object UdashTooltip extends TooltipUtils[UdashTooltip] {
     new UdashTooltip(tp)
   }
 
-  override protected val defaultPlacement = Placement.Top
+  override protected val defaultPlacement: StaticPlacement = Placement.Top
   override protected val defaultTemplate: String = {
     import io.udash.css.CssView._
     import scalatags.Text.all._

bootstrap4/.js/src/main/scala/io/udash/bootstrap/utils/UdashBootstrapComponent.scala

@@ -2,11 +2,12 @@ package io.udash.bootstrap.utils
 
 import io.udash.bindings.modifiers.Binding
 import io.udash.component.Component
-import io.udash.wrappers.jquery._
+import io.udash.css.CssView
+import io.udash.wrappers.jquery.*
 import org.scalajs.dom.Element
 
 /** Base trait for Bootstrap components. */
-trait UdashBootstrapComponent extends Component {
+trait UdashBootstrapComponent extends Component with CssView {
   override val render: Element
 
   protected class JQueryOnBinding(selector: JQuery, event: EventName, callback: JQueryCallback) extends Binding {

bootstrap4/.js/src/test/scala/io/udash/bootstrap/button/UdashButtonTest.scala

@@ -1,10 +1,11 @@
 package io.udash.bootstrap.button
 
-import io.udash._
-import io.udash.bootstrap._
+import io.udash.*
+import io.udash.bootstrap.*
 import io.udash.bootstrap.utils.BootstrapStyles
 import io.udash.testing.UdashCoreFrontendTest
-import io.udash.wrappers.jquery._
+import io.udash.wrappers.jquery.*
+import com.avsystem.commons.SharedExtensions.*
 
 class UdashButtonTest extends UdashCoreFrontendTest {
 

bootstrap4/.js/src/test/scala/io/udash/bootstrap/datepicker/UdashDatePickerTest.scala

@@ -1,18 +1,18 @@
 package io.udash.bootstrap
 package datepicker
 
-import java.{util => ju}
+import java.util as ju
 
-import com.avsystem.commons._
-import io.udash._
+import io.udash.*
 import io.udash.bootstrap.datepicker.UdashDatePickerTest.JQueryDatePickerExt
 import io.udash.bootstrap.form.UdashInputGroup
 import io.udash.bootstrap.utils.UdashIcons.FontAwesome
 import io.udash.i18n.{Bundle, BundleHash, Lang, LocalTranslationProvider, TranslationKey}
 import io.udash.testing.AsyncUdashCoreFrontendTest
-import io.udash.wrappers.jquery._
+import io.udash.wrappers.jquery.*
 import org.scalajs.dom
-import scalatags.JsDom.all._
+import scalatags.JsDom.all.*
+import com.avsystem.commons.SharedExtensions.*
 
 import scala.concurrent.Future
 import scala.scalajs.js

build.sbt

@@ -71,6 +71,7 @@ val commonSettings = Seq(
     "-language:experimental.macros",
     "-Xfatal-warnings",
     "-Xlint:_,-missing-interpolator,-unused",
+    "-Xsource:3",
     "-Yrangepos",
     "-Ybackend-parallelism", "8",
     "-Ycache-plugin-class-loader:last-modified",

core/.js/src/main/scala/io/udash/Application.scala

@@ -61,7 +61,7 @@ class Application[HierarchyRoot >: Null <: GState[HierarchyRoot] : PropertyCreat
       onApplicationStarted(rootElement)
     }
     if (dom.document.readyState != DocumentReadyState.loading) onReady()
-    else dom.document.addEventListener("DOMContentLoaded", { _: Event => onReady() }, new EventListenerOptions {
+    else dom.document.addEventListener("DOMContentLoaded", { (_: Event) => onReady() }, new EventListenerOptions {
       once = true
       passive = true
     })

core/.js/src/main/scala/io/udash/bindings/Bindings.scala

@@ -375,9 +375,9 @@ object Bindings extends Bindings {
         val dyn: js.Dynamic = el.asInstanceOf[js.Dynamic]
         val existingCallbacks: js.Function1[T, Boolean] = dyn.selectDynamic(attr.name).asInstanceOf[js.Function1[T, Boolean]]
         if (existingCallbacks == null)
-          dyn.updateDynamic(attr.name) { e: T => if (callback(e) == true) e.preventDefault() }
+          dyn.updateDynamic(attr.name) { (e: T) => if (callback(e) == true) e.preventDefault() }
         else
-          dyn.updateDynamic(attr.name) { e: T =>
+          dyn.updateDynamic(attr.name) { (e: T) =>
             val preventDefault = callback(e)
             if (preventDefault == true) e.preventDefault()
             else existingCallbacks(e)

core/.js/src/main/scala/io/udash/bindings/inputs/TextInputsModifier.scala

@@ -32,18 +32,16 @@ private[bindings] abstract class TextInputsModifier(property: Property[String],
     }
 
     var propertyUpdateHandler: Int = 0
-    val callback = if (debounce.toMillis > 0) {
-      _: Event => {
-        if (propertyUpdateHandler != 0) window.clearTimeout(propertyUpdateHandler)
-        propertyUpdateHandler = window.setTimeout(() => {
-          updatePropertyValueForElement(t)
-        }, debounce.toMillis.toDouble)
-      }
-    } else {
-      _: Event => {
-        updatePropertyValueForElement(t)
-      }
-    }
+    val callback =
+      if (debounce.toMillis > 0)
+        (_: Event) => {
+          if (propertyUpdateHandler != 0) window.clearTimeout(propertyUpdateHandler)
+          propertyUpdateHandler = window.setTimeout(() => {
+            updatePropertyValueForElement(t)
+          }, debounce.toMillis.toDouble)
+        }
+      else
+        (_: Event) => updatePropertyValueForElement(t)
     setElementKeyUp(t, callback)
     setElementOnChange(t, callback)
     setElementOnInput(t, callback)

core/.js/src/main/scala/io/udash/component/ComponentId.scala

@@ -6,8 +6,7 @@ import org.scalajs.dom.Element
 import scalatags.JsDom.GenericAttr
 import scalatags.JsDom.all._
 
-
-final case class ComponentId private(value: String) extends AbstractCase with Modifier {
+final case class ComponentId(value: String) extends AbstractCase with Modifier {
   override def applyTo(t: Element): Unit = {
     t.id = value
   }

core/.js/src/test/scala/io/udash/bindings/TagsBindingTest.scala

@@ -626,7 +626,7 @@ class TagsBindingTest extends UdashFrontendTest with Bindings { bindings: Bindin
 
       p.set(new Model.WithSubTrait {
         override def i = 5
-        override def subType = new Model.SubTrait {
+        override def subType: Model.SubTrait = new Model.SubTrait {
           override def i = 7
         }
       })

guide/commons/.js/src/main/scala/io/udash/web/commons/components/Footer.scala

@@ -1,17 +1,19 @@
 package io.udash.web.commons.components
 
-import com.avsystem.commons._
+import com.avsystem.commons.Opt
+import io.udash.*
 import io.udash.css.CssStyle
 import io.udash.web.commons.config.ExternalUrls
 import io.udash.web.commons.styles.GlobalStyles
 import io.udash.web.commons.styles.components.FooterStyles
 import io.udash.web.commons.views.Image
 import org.scalajs.dom.html.Element
 import scalatags.JsDom
-import scalatags.JsDom.all._
+import scalatags.JsDom.all.*
 
 object Footer {
-  import io.udash.css.CssView._
+
+  import io.udash.css.CssView.*
   private val styles = FooterStyles
 
   private def template(wrapperStyle: Opt[CssStyle]): JsDom.TypedTag[Element] = footer(styles.footer)(

guide/commons/.js/src/main/scala/io/udash/web/commons/views/MarkdownView.scala

@@ -1,13 +1,13 @@
 package io.udash.web.commons.views
 
-import com.avsystem.commons._
-import com.avsystem.commons.misc.AbstractCase
-import io.udash._
-import io.udash.bootstrap._
+import com.avsystem.commons.misc.{AbstractCase, Opt}
+import io.udash.*
+import io.udash.bootstrap.*
 import io.udash.bootstrap.alert.UdashAlert
 import io.udash.web.guide.markdown.{MarkdownPage, MarkdownPageRPC}
 import io.udash.web.guide.styles.MarkdownStyles
 import org.scalajs.dom
+import com.avsystem.commons.SharedExtensions.*
 
 import scala.util.{Failure, Success}
 
@@ -67,7 +67,7 @@ final class MarkdownView(model: ReadableModelProperty[MarkdownModel]) extends Vi
   import io.udash.css.CssView._
   import scalatags.JsDom.all._
 
-  override val getTemplate: Modifier = ISeq(
+  override val getTemplate: Modifier = Seq(
     produce(model.roSubProp(_.error)) { error =>
       error.opt.filter(_.nonEmpty).map(e =>
         div(cls := "bootstrap")(

guide/guide/.js/src/main/scala/io/udash/web/guide/views/ContentView.scala

@@ -1,12 +1,12 @@
 package io.udash.web.guide.views
 
-import io.udash._
+import io.udash.*
 import io.udash.web.commons.styles.GlobalStyles
 import io.udash.web.guide.ContentState
 import io.udash.web.guide.components.GuideMenu
 import io.udash.web.guide.styles.partials.GuideStyles
-
-import scalatags.JsDom.tags2._
+import org.scalajs.dom.Element
+import scalatags.JsDom.tags2.*
 
 object ContentViewFactory extends StaticViewFactory[ContentState.type](() => new ContentView)
 
@@ -15,7 +15,7 @@ class ContentView extends ViewContainer {
 
   import scalatags.JsDom.all._
 
-  protected val child = main(GuideStyles.contentWrapper).render
+  override protected val child: Element = main(GuideStyles.contentWrapper).render
 
   private val content = main(GuideStyles.main)(
     div(GlobalStyles.body)(

guide/guide/.js/src/main/scala/io/udash/web/guide/views/RootView.scala

@@ -1,16 +1,17 @@
 package io.udash.web.guide.views
 
-import io.udash._
+import io.udash.*
 import io.udash.web.commons.components.Footer
 import io.udash.web.guide.RootState
 import io.udash.web.guide.components.Header
+import org.scalajs.dom.Element
 
 object RootViewFactory extends StaticViewFactory[RootState.type](() => new RootView)
 
 class RootView extends ViewContainer {
   import scalatags.JsDom.all._
 
-  protected val child = div().render
+  override protected val child: Element = div().render
 
   private val content = div(
     Header.getTemplate,

guide/guide/.js/src/main/scala/io/udash/web/guide/views/ViewContainer.scala

@@ -6,9 +6,6 @@ import org.scalajs.dom._
 
 import scala.scalajs.js
 
-/**
-  * Created by malchik on 2016-03-30.
-  */
 abstract class ViewContainer extends ContainerView {
   protected val child: Element
 

guide/guide/.js/src/main/scala/io/udash/web/guide/views/bootstrapping/BootstrappingView.scala

@@ -1,8 +1,9 @@
 package io.udash.web.guide.views.bootstrapping
 
-import io.udash._
+import io.udash.*
 import io.udash.web.guide.views.ViewContainer
-import io.udash.web.guide.{Context, _}
+import io.udash.web.guide.{Context, *}
+import org.scalajs.dom.Element
 import scalatags.JsDom
 
 case object BootstrappingViewFactory extends StaticViewFactory[BootstrappingState.type](() => new BootstrappingView)
@@ -11,7 +12,7 @@ class BootstrappingView extends ViewContainer {
   import Context._
   import JsDom.all._
 
-  protected val child = div().render
+  override protected val child: Element = div().render
 
   override def getTemplate: Modifier = div(
     h1("Application bootstrapping"),