Fix events, fix per komponent hash

.gitignore

@@ -1,4 +1,4 @@
 # Created by .ignore support plugin (hsz.mobi)
 web/js/generated
-gradle.propertiesx
+gradle.properties
 local.properties

build.gradle.kts

@@ -1,11 +1,11 @@
 
 plugins {
-    kotlin("multiplatform") version "1.4.30"
+    kotlin("multiplatform") version "1.4.32"
     `maven-publish`
 }
 
 group = "nl.astraeus"
-version = "0.2.5-SNAPSHOT"
+version = "0.2.6-SNAPSHOT"
 
 repositories {
     mavenCentral()

komp.ipr

@@ -257,6 +257,10 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/komp.iml" filepath="$PROJECT_DIR$/komp.iml" />
+      <module fileurl="file://$PROJECT_DIR$/komp.commonMain.iml" filepath="$PROJECT_DIR$/komp.commonMain.iml" />
+      <module fileurl="file://$PROJECT_DIR$/komp.commonTest.iml" filepath="$PROJECT_DIR$/komp.commonTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/komp.jsMain.iml" filepath="$PROJECT_DIR$/komp.jsMain.iml" />
+      <module fileurl="file://$PROJECT_DIR$/komp.jsTest.iml" filepath="$PROJECT_DIR$/komp.jsTest.iml" />
       <module fileurl="file://$PROJECT_DIR$/komp_main.iml" filepath="$PROJECT_DIR$/komp_main.iml" group="komp" />
       <module fileurl="file://$PROJECT_DIR$/komp_test.iml" filepath="$PROJECT_DIR$/komp_test.iml" group="komp" />
     </modules>
@@ -362,41 +366,130 @@
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
   </component>
+  <component name="accountSettings">
+    <option name="activeRegion" value="us-east-1" />
+    <option name="recentlyUsedRegions">
+      <list>
+        <option value="us-east-1" />
+      </list>
+    </option>
+  </component>
+  <component name="libraries-with-intellij-classes">
+    <option name="intellijApiContainingLibraries">
+      <list>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="ideaIU" />
+          <option name="groupId" value="com.jetbrains.intellij.idea" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="ideaIU" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="ideaIC" />
+          <option name="groupId" value="com.jetbrains.intellij.idea" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="ideaIC" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="pycharmPY" />
+          <option name="groupId" value="com.jetbrains.intellij.pycharm" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="pycharmPY" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="pycharmPC" />
+          <option name="groupId" value="com.jetbrains.intellij.pycharm" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="pycharmPC" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="clion" />
+          <option name="groupId" value="com.jetbrains.intellij.clion" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="clion" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="riderRD" />
+          <option name="groupId" value="com.jetbrains.intellij.rider" />
+        </LibraryCoordinatesState>
+        <LibraryCoordinatesState>
+          <option name="artifactId" value="riderRD" />
+          <option name="groupId" value="com.jetbrains" />
+        </LibraryCoordinatesState>
+      </list>
+    </option>
+  </component>
   <component name="libraryTable">
-    <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-common:1.3.70" type="kotlin.common">
+    <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-common:1.4.30" type="kotlin.common">
       <CLASSES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.70/3fa8dd6c896d635e78201e5e811545f3846dec04/kotlin-stdlib-common-1.3.70.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.4.30/bb9a3173350f55732416ee27956ea8f9b81f4dbb/kotlin-stdlib-common-1.4.30.jar!/" />
       </CLASSES>
       <JAVADOC />
       <SOURCES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.70/6eefff69d45d17fb1b50591729853e9f6a15d09/kotlin-stdlib-common-1.3.70-sources.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.4.30/9427471650876e86fdb0dd878f147ff15c57eac0/kotlin-stdlib-common-1.4.30-sources.jar!/" />
       </SOURCES>
     </library>
-    <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.3.70" type="kotlin.js">
+    <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.4.30" type="kotlin.js">
       <CLASSES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.70/41513becdc85a89799b74028a81c39c364ba3465/kotlin-stdlib-js-1.3.70.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.4.30/6c66d1db9c724b087c3a6f37aecffd24d0b14f26/kotlin-stdlib-js-1.4.30.jar!/" />
       </CLASSES>
       <JAVADOC />
       <SOURCES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.70/8b0cd54438c595bb7c2c5e1e4a77a61f0eb39af5/kotlin-stdlib-js-1.3.70-sources.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.4.30/5729944dc91bf28689461fe44b9e401fd41a84a7/kotlin-stdlib-js-1.4.30-sources.jar!/" />
       </SOURCES>
     </library>
-    <library name="Gradle: org.jetbrains.kotlinx:kotlinx-html-common:0.7.1" type="kotlin.common">
+    <library name="Gradle: org.jetbrains.kotlin:kotlin-test-annotations-common:1.4.30" type="kotlin.common">
       <CLASSES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-common/0.7.1/26651a49fdc0e6abf8a61182b01d6bb0a6bb427e/kotlinx-html-common-0.7.1.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-annotations-common/1.4.30/e77a76b23fc3007baf57a9d3354fdd318fe1fa88/kotlin-test-annotations-common-1.4.30.jar!/" />
       </CLASSES>
       <JAVADOC />
       <SOURCES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-common/0.7.1/5aba2eaa4e02d75d6e526900ee69d4e20a0d6d94/kotlinx-html-common-0.7.1-sources.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-annotations-common/1.4.30/57512e29ee20defe37d54ce19507d599b0f2113/kotlin-test-annotations-common-1.4.30-sources.jar!/" />
       </SOURCES>
     </library>
-    <library name="Gradle: org.jetbrains.kotlinx:kotlinx-html-js:0.7.1" type="kotlin.js">
+    <library name="Gradle: org.jetbrains.kotlin:kotlin-test-common:1.4.30" type="kotlin.common">
       <CLASSES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-js/0.7.1/f3a744916effcbe728d38e4bfd732f9694d18fa9/kotlinx-html-js-0.7.1.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-common/1.4.30/823ed87441680d1334a1f0d23781c0089e16c0a6/kotlin-test-common-1.4.30.jar!/" />
       </CLASSES>
       <JAVADOC />
       <SOURCES>
-        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-js/0.7.1/435518751d3af45577f8af5f64c4850bc5989af2/kotlinx-html-js-0.7.1-sources.jar!/" />
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-common/1.4.30/d1818d1bdc457b51289f006884a260b56a55cb77/kotlin-test-common-1.4.30-sources.jar!/" />
+      </SOURCES>
+    </library>
+    <library name="Gradle: org.jetbrains.kotlin:kotlin-test-js:1.4.30" type="kotlin.js">
+      <CLASSES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-js/1.4.30/5b1cb1ec31a344f6aa1047d6cae3a268825cb724/kotlin-test-js-1.4.30.jar!/" />
+      </CLASSES>
+      <JAVADOC />
+      <SOURCES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-test-js/1.4.30/8e70170db077d3f421c3fb6d24468b3938990f4a/kotlin-test-js-1.4.30-sources.jar!/" />
+      </SOURCES>
+    </library>
+    <library name="Gradle: org.jetbrains.kotlinx:kotlinx-html-common:0.7.2" type="kotlin.common">
+      <CLASSES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-common/0.7.2/7da838083337896b558cab2884c4118709a58769/kotlinx-html-metadata-0.7.2.jar!/" />
+      </CLASSES>
+      <JAVADOC />
+      <SOURCES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-common/0.7.2/866bbbfe0a81d49cdf19fd149adafbb938b35be4/kotlinx-html-common-0.7.2-sources.jar!/" />
+      </SOURCES>
+    </library>
+    <library name="Gradle: org.jetbrains.kotlinx:kotlinx-html-js:0.7.2" type="kotlin.js">
+      <CLASSES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-js/0.7.2/baf7e494e549776d0ae3e0ee225804a513f5dc26/kotlinx-html-jslegacy-0.7.2.jar!/" />
+      </CLASSES>
+      <JAVADOC />
+      <SOURCES>
+        <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-html-js/0.7.2/b09bfd3565058174afa3fd0888743f8b8dca5406/kotlinx-html-js-0.7.2-sources.jar!/" />
       </SOURCES>
     </library>
   </component>

komp.jsTest.iml

@@ -5,8 +5,8 @@
       <configuration version="3" platform="JavaScript " allPlatforms="JS []" useProjectSettings="false" isTestModule="true" externalProjectId="komp" pureKotlinSourceFolders="$MODULE_DIR$/src/jsMain/kotlin;/home/rnentjes/Development/komp/komp/build/externals/komp-jsLegacy/src;/home/rnentjes/Development/komp/komp/build/externals/komp-jsIr/src;/home/rnentjes/Development/komp/komp/src/jsTest/kotlin;/home/rnentjes/Development/komp/komp/src/commonMain/kotlin">
         <dependsOnModuleNames>komp:commonTest</dependsOnModuleNames>
         <sourceSets>
-          <sourceSet>komp.commonTest</sourceSet>
           <sourceSet>komp.jsMain</sourceSet>
+          <sourceSet>komp.commonTest</sourceSet>
           <sourceSet>komp.commonMain</sourceSet>
         </sourceSets>
         <newMppModelJpsModuleKind>COMPILATION_AND_SOURCE_SET_HOLDER</newMppModelJpsModuleKind>

src/jsMain/kotlin/nl/astraeus/komp/DiffPatch.kt

@@ -6,7 +6,7 @@ import org.w3c.dom.events.Event
 const val HASH_VALUE = "komp-hash-value"
 
 //const val HASH_ATTRIBUTE = "data-komp-hash"
-const val EVENT_ATTRIBUTE = "data-komp-events"
+const val EVENT_PROPERTY = "komp-events"
 
 fun Node.getKompHash(): Int = this.asDynamic()[HASH_VALUE] as? Int? ?: -1
 
@@ -32,6 +32,8 @@ object DiffPatch {
         oldNode is HTMLElement &&
             newNode is HTMLElement &&
             oldNode.nodeName == newNode.nodeName &&
+            oldNode.getKompHash() != -1 &&
+            newNode.getKompHash() != -1 &&
             oldNode.getKompHash() == newNode.getKompHash()
         )
   }
@@ -81,10 +83,10 @@ object DiffPatch {
         if (Komponent.logReplaceEvent) {
           console.log("Update children", oldNode.nodeName, newNode.nodeName)
         }
+        updateKomponentOnNode(oldNode, newNode)
         updateChildren(oldNode, newNode)
         oldNode.setKompHash(newNode.getKompHash())
 
-        updateKomponentOnNode(oldNode, newNode)
         return oldNode
       }
     }
@@ -94,7 +96,6 @@ object DiffPatch {
     }
 
     oldNode.parentNode?.replaceChild(newNode, oldNode)
-    //replaceNode(oldNode, newNode)
     return newNode
   }
 
@@ -123,21 +124,8 @@ object DiffPatch {
 
     if (newNode is HTMLInputElement && oldNode is HTMLInputElement) {
       oldNode.value = newNode.value
+      oldNode.checked = newNode.checked
     }
-
-/*
-    for (index in 0 until newNode.attributes.length) {
-      val attr = newNode.attributes[index]
-
-      if (attr != null) {
-        val oldAttr = oldNode.attributes[attr.name]
-
-        if (oldAttr == null || oldAttr.value != attr.value) {
-          oldNode.setAttribute(attr.name, attr.value)
-        }
-      }
-    }
-*/
   }
 
   private fun updateChildren(oldNode: HTMLElement, newNode: HTMLElement) {
@@ -278,86 +266,32 @@ object DiffPatch {
   }
 
   private fun updateEvents(oldNode: HTMLElement, newNode: HTMLElement) {
-    val oldEvents = mutableListOf<String>()
+    val oldEvents = (oldNode.asDynamic()[EVENT_PROPERTY] as? MutableList<String>) ?: mutableListOf()
-    oldEvents.addAll((oldNode.getAttribute(EVENT_ATTRIBUTE) ?: "").split(","))
+    val newEvents = (newNode.asDynamic()[EVENT_PROPERTY] as? MutableList<String>) ?: mutableListOf()
-
-    val newEvents = (newNode.getAttribute(EVENT_ATTRIBUTE) ?: "").split(",")
 
     if (Komponent.logReplaceEvent) {
-      console.log("Update events", oldNode.getAttribute(EVENT_ATTRIBUTE), newNode.getAttribute(EVENT_ATTRIBUTE))
+      console.log("Update events", oldNode.getAttribute(EVENT_PROPERTY), newNode.getAttribute(EVENT_PROPERTY))
-    }
-
-    for (event in newEvents) {
-      if (event.isNotBlank()) {
-        val oldNodeEvent = oldNode.asDynamic()["event-$event"]
-        val newNodeEvent = newNode.asDynamic()["event-$event"]
-        if (oldNodeEvent != null) {
-          if (Komponent.logReplaceEvent) {
-            console.log("Remove old event $event")
-          }
-          oldNode.removeEventListener(event, oldNodeEvent as ((Event) -> Unit), null)
-        }
-        if (newNodeEvent != null) {
-          if (Komponent.logReplaceEvent) {
-            console.log("Set event $event on", oldNode)
-          }
-          oldNode.setEvent(event, newNodeEvent as ((Event) -> Unit))
-        }
-        oldEvents.remove(event)
-      }
     }
 
     for (event in oldEvents) {
-      if (event.isNotBlank()) {
+      oldNode.removeKompEvent(event)
-        val oldNodeEvent = oldNode.asDynamic()["event-$event"]
+    }
-        if (oldNodeEvent != null) {
+
-          oldNode.removeEventListener(event, oldNodeEvent as ((Event) -> Unit), null)
+    for (event in newEvents) {
+      val newNodeEvent = newNode.asDynamic()["event-$event"]
+
+      if (newNodeEvent != null) {
+        if (Komponent.logReplaceEvent) {
+          console.log("Set event $event on", oldNode)
         }
+        oldNode.setKompEvent(event, newNodeEvent as ((Event) -> Unit))
       }
     }
 
-    newNode.getAttribute(EVENT_ATTRIBUTE)?.also {
+    if (newEvents.isEmpty()) {
-      oldNode.setAttribute(EVENT_ATTRIBUTE, it)
+      oldNode.asDynamic()[EVENT_PROPERTY] = null
-    }
+    } else {
-  }
+      oldNode.asDynamic()[EVENT_PROPERTY] = newNode.asDynamic()[EVENT_PROPERTY]
-
-  private fun replaceNode(oldNode: Node, newNode: Node) {
-    oldNode.parentNode?.also { parent ->
-      val clone = newNode.cloneNode(true)
-      cloneEvents(clone, newNode)
-      parent.replaceChild(clone, oldNode)
-    }
-  }
-
-  private fun cloneEvents(destination: Node, source: Node) {
-    if (source is HTMLElement && destination is HTMLElement) {
-      val events = (source.getAttribute(EVENT_ATTRIBUTE) ?: "").split(",")
-      for (event in events) {
-        if (event.isNotBlank()) {
-          if (Komponent.logReplaceEvent) {
-            console.log("Clone event $event on", source)
-          }
-
-          val foundEvent = source.asDynamic()["event-$event"]
-          if (foundEvent != null) {
-            if (Komponent.logReplaceEvent) {
-              console.log("Clone add eventlistener", foundEvent)
-            }
-            destination.setEvent(event, foundEvent as ((Event) -> Unit))
-          } else {
-            if (Komponent.logReplaceEvent) {
-              console.log("Event not found $event", source)
-            }
-          }
-        }
-      }
-    }
-    for (index in 0 until source.childNodes.length) {
-      destination.childNodes[index]?.also { destinationChild ->
-        source.childNodes[index]?.also { sourceChild ->
-          cloneEvents(destinationChild, sourceChild)
-        }
-      }
     }
   }
 

src/jsMain/kotlin/nl/astraeus/komp/HtmlBuilder.kt

@@ -7,29 +7,57 @@ import org.w3c.dom.css.CSSStyleDeclaration
 import org.w3c.dom.events.Event
 
 @Suppress("NOTHING_TO_INLINE")
-inline fun HTMLElement.setEvent(name: String, noinline callback: (Event) -> Unit) {
+inline fun HTMLElement.setKompEvent(name: String, noinline callback: (Event) -> Unit) {
   val eventName = if (name.startsWith("on")) {
     name.substring(2)
   } else {
     name
   }
   addEventListener(eventName, callback, null)
+
   if (Komponent.updateStrategy == UpdateStrategy.DOM_DIFF) {
     //asDynamic()[name] = callback
-    val events = getAttribute(EVENT_ATTRIBUTE) ?: ""
+    val events: MutableList<String> = (asDynamic()[EVENT_PROPERTY] as? MutableList<String>) ?: mutableListOf()
 
-    setAttribute(
+    events.add(eventName)
-      EVENT_ATTRIBUTE,
+    asDynamic()[EVENT_PROPERTY] = events
-        if (events.isBlank()) {
-          eventName
-        } else {
-          "$events,$eventName"
-        }
-    )
     asDynamic()["event-$eventName"] = callback
   }
 }
 
+@Suppress("NOTHING_TO_INLINE")
+inline fun HTMLElement.removeKompEvent(name: String) {
+  val eventName = if (name.startsWith("on")) {
+    name.substring(2)
+  } else {
+    name
+  }
+
+  removeEventListener(eventName, asDynamic()["event-$eventName"] as ((Event) -> Unit), null)
+
+  if (Komponent.updateStrategy == UpdateStrategy.DOM_DIFF) {
+    //asDynamic()[name] = callback
+    val events: MutableList<String> = (asDynamic()[EVENT_PROPERTY] as? MutableList<String>) ?: mutableListOf()
+
+    events.remove(eventName)
+    asDynamic()["event-$eventName"] = null
+  }
+}
+
+fun HTMLElement.clearEvents() {
+  if (Komponent.updateStrategy == UpdateStrategy.DOM_DIFF) {
+    //asDynamic()[name] = callback
+    val events = getAttribute(EVENT_PROPERTY) ?: ""
+
+    for (eventName in events.split(",")) {
+      if (eventName.isNotBlank()) {
+        val event: (Event) -> Unit = asDynamic()["event-$eventName"]
+        removeEventListener(eventName, event)
+      }
+    }
+  }
+}
+
 interface HtmlConsumer : TagConsumer<HTMLElement> {
   fun append(node: Node)
 }
@@ -43,8 +71,9 @@ fun HTMLElement.setStyles(cssStyle: CSSStyleDeclaration) {
 }
 
 class HtmlBuilder(
-    val komponent: Komponent,
+  val komponent: Komponent,
-    val document: Document
+  val document: Document,
+  val baseHash: Int
 ) : HtmlConsumer {
   private val path = arrayListOf<HTMLElement>()
   private var lastLeaved: HTMLElement? = null
@@ -80,7 +109,7 @@ class HtmlBuilder(
     when {
       path.isEmpty()                                                 -> throw IllegalStateException("No current tag")
       path.last().tagName.toLowerCase() != tag.tagName.toLowerCase() -> throw IllegalStateException("Wrong current tag")
-      else                                                           -> path.last().setEvent(event, value)
+      else -> path.last().setKompEvent(event, value)
     }
   }
 
@@ -161,13 +190,10 @@ class HtmlBuilder(
           hash = hash * 37 + key_value.hashCode()
         }
       }
-
-
     }
 
     if (Komponent.updateStrategy == UpdateStrategy.DOM_DIFF) {
-      element.setKompHash(hash)
+      element.setKompHash(baseHash * 53 + hash)
-      //element.setAttribute(DiffPatch.HASH_ATTRIBUTE, hash.toString(16))
     }
     lastLeaved = path.removeAt(path.lastIndex)
   }
@@ -221,7 +247,8 @@ class HtmlBuilder(
 
   companion object {
     fun create(content: HtmlBuilder.() -> Unit): HTMLElement {
-      val consumer = HtmlBuilder(DummyKomponent(), document)
+      val komponent = DummyKomponent()
+      val consumer = HtmlBuilder(komponent, document, komponent.hashCode())
       content.invoke(consumer)
       return consumer.finalize()
     }

src/jsMain/kotlin/nl/astraeus/komp/Komponent.kt

@@ -70,8 +70,14 @@ abstract class Komponent {
   val declaredStyles: MutableMap<String, CSSStyleDeclaration> = HashMap()
 
   open fun create(): HTMLElement {
-    val consumer = HtmlBuilder(this, document)
+    val consumer = HtmlBuilder(this, document, this.createIndex)
-    consumer.render()
+    try {
+      consumer.render()
+    } catch (e: Throwable) {
+      println("Exception occurred in ${this::class.simpleName}.render() call!")
+
+      throw e
+    }
     val result = consumer.finalize()
 
     if (result.id.isBlank()) {
@@ -188,9 +194,8 @@ abstract class Komponent {
 
       todo.forEach { next ->
         val element = next.element
-        console.log("update element", element)
+
         if (element is HTMLElement) {
-          console.log("by id", document.getElementById(element.id))
           if (document.getElementById(element.id) != null) {
             if (next.dirty) {
               if (logRenderEvent) {