From 736b80835f67c9c34657074ebcfbe0752bef1c18 Mon Sep 17 00:00:00 2001
From: Robert Jaros <rjaros@finn.pl>
Date: Thu, 17 Oct 2019 21:58:34 +0200
Subject: Move DSL builder functions out of the companion objects (#93)

---
 src/main/kotlin/pl/treksoft/kvision/core/Style.kt  | 39 +++++++-------
 src/main/kotlin/pl/treksoft/kvision/core/Widget.kt | 22 ++++----
 .../pl/treksoft/kvision/core/WidgetWrapper.kt      | 31 +++++------
 .../kotlin/pl/treksoft/kvision/form/FieldLabel.kt  | 28 +++++-----
 .../kotlin/pl/treksoft/kvision/form/FormPanel.kt   | 32 +++++------
 .../pl/treksoft/kvision/form/check/CheckBox.kt     | 28 +++++-----
 .../treksoft/kvision/form/check/CheckBoxInput.kt   | 29 +++++-----
 .../kotlin/pl/treksoft/kvision/form/check/Radio.kt | 28 +++++-----
 .../pl/treksoft/kvision/form/check/RadioGroup.kt   | 28 +++++-----
 .../treksoft/kvision/form/check/RadioGroupInput.kt | 28 +++++-----
 .../pl/treksoft/kvision/form/check/RadioInput.kt   | 29 +++++-----
 .../treksoft/kvision/form/select/SimpleSelect.kt   | 38 ++++++-------
 .../kvision/form/select/SimpleSelectInput.kt       | 29 +++++-----
 .../pl/treksoft/kvision/form/text/Password.kt      | 36 ++++++-------
 .../kotlin/pl/treksoft/kvision/form/text/Text.kt   | 28 +++++-----
 .../pl/treksoft/kvision/form/text/TextArea.kt      | 28 +++++-----
 .../pl/treksoft/kvision/form/text/TextAreaInput.kt | 28 +++++-----
 .../pl/treksoft/kvision/form/text/TextInput.kt     | 28 +++++-----
 src/main/kotlin/pl/treksoft/kvision/html/Button.kt | 38 +++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Canvas.kt | 30 +++++------
 src/main/kotlin/pl/treksoft/kvision/html/Div.kt    | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Footer.kt | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H1.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H2.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H3.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H4.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H5.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/H6.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Header.kt | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Icon.kt   | 26 +++++----
 src/main/kotlin/pl/treksoft/kvision/html/Iframe.kt | 32 ++++++-----
 src/main/kotlin/pl/treksoft/kvision/html/Image.kt  | 28 +++++-----
 src/main/kotlin/pl/treksoft/kvision/html/Link.kt   | 28 +++++-----
 src/main/kotlin/pl/treksoft/kvision/html/List.kt   | 28 +++++-----
 src/main/kotlin/pl/treksoft/kvision/html/P.kt      | 34 ++++++------
 .../kotlin/pl/treksoft/kvision/html/Section.kt     | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Span.kt   | 34 ++++++------
 src/main/kotlin/pl/treksoft/kvision/html/Tag.kt    | 30 +++++------
 .../kotlin/pl/treksoft/kvision/panel/DockPanel.kt  | 22 ++++----
 .../kotlin/pl/treksoft/kvision/panel/FlexPanel.kt  | 30 +++++------
 .../kotlin/pl/treksoft/kvision/panel/GridPanel.kt  | 40 +++++++-------
 .../kotlin/pl/treksoft/kvision/panel/HPanel.kt     | 36 ++++++-------
 src/main/kotlin/pl/treksoft/kvision/panel/Root.kt  | 47 ++++++++--------
 .../pl/treksoft/kvision/panel/SimplePanel.kt       | 22 ++++----
 .../kotlin/pl/treksoft/kvision/panel/SplitPanel.kt | 28 +++++-----
 .../kotlin/pl/treksoft/kvision/panel/StackPanel.kt | 26 ++++-----
 .../kotlin/pl/treksoft/kvision/panel/VPanel.kt     | 28 +++++-----
 .../pl/treksoft/kvision/state/StateBinding.kt      | 48 ++++++++---------
 src/main/kotlin/pl/treksoft/kvision/table/Cell.kt  | 63 +++++++++++-----------
 .../kotlin/pl/treksoft/kvision/table/HeaderCell.kt | 35 ++++++------
 src/main/kotlin/pl/treksoft/kvision/table/Row.kt   | 28 +++++-----
 src/main/kotlin/pl/treksoft/kvision/table/Table.kt | 32 ++++++-----
 52 files changed, 790 insertions(+), 880 deletions(-)

(limited to 'src/main/kotlin')

diff --git a/src/main/kotlin/pl/treksoft/kvision/core/Style.kt b/src/main/kotlin/pl/treksoft/kvision/core/Style.kt
index ff91c429..7c650e6c 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/Style.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/Style.kt
@@ -96,26 +96,25 @@ open class Style(className: String? = null, parentStyle: Style? = null, init: (S
     companion object {
         internal var counter = 0
         internal var styles = mutableListOf<Style>()
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Widget.style(className: String? = null, init: (Style.() -> Unit)? = null): Style {
-            val style = Style(className, null, init)
-            this.addCssClass(style)
-            return style
-        }
-
-        /**
-         * DSL builder extension function for cascading styles.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Style.style(className: String? = null, init: (Style.() -> Unit)? = null): Style {
-            return Style(className, this, init)
-        }
     }
+}
 
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Widget.style(className: String? = null, init: (Style.() -> Unit)? = null): Style {
+    val style = Style(className, null, init)
+    this.addCssClass(style)
+    return style
+}
+
+/**
+ * DSL builder extension function for cascading styles.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Style.style(className: String? = null, init: (Style.() -> Unit)? = null): Style {
+    return Style(className, this, init)
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
index 24543b1f..9b3e9226 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
@@ -810,16 +810,16 @@ open class Widget(classes: Set<String> = setOf()) : StyledComponent(), Component
 
     companion object {
         private var counter: Long = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.widget(classes: Set<String> = setOf(), init: (Widget.() -> Unit)? = null): Widget {
-            val widget = Widget(classes).apply { init?.invoke(this) }
-            this.add(widget)
-            return widget
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.widget(classes: Set<String> = setOf(), init: (Widget.() -> Unit)? = null): Widget {
+    val widget = Widget(classes).apply { init?.invoke(this) }
+    this.add(widget)
+    return widget
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/core/WidgetWrapper.kt b/src/main/kotlin/pl/treksoft/kvision/core/WidgetWrapper.kt
index 739cb99e..1d5ada90 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/WidgetWrapper.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/WidgetWrapper.kt
@@ -23,7 +23,6 @@ package pl.treksoft.kvision.core
 
 import com.github.snabbdom.VNode
 import pl.treksoft.kvision.panel.SimplePanel
-import kotlin.Unit
 
 /**
  * This class allows to wrap a component into separately styled DIV element.
@@ -55,21 +54,19 @@ open class WidgetWrapper(internal var wrapped: Component?, classes: Set<String>
         wrapped?.clearParent()
         wrapped = null
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.widgetWrapper(
-            wrapped: Component?,
-            classes: Set<String> = setOf(),
-            init: (WidgetWrapper.() -> Unit)? = null
-        ): WidgetWrapper {
-            val widgetWrapper = WidgetWrapper(wrapped, classes).apply { init?.invoke(this) }
-            this.add(widgetWrapper)
-            return widgetWrapper
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.widgetWrapper(
+    wrapped: Component?,
+    classes: Set<String> = setOf(),
+    init: (WidgetWrapper.() -> Unit)? = null
+): WidgetWrapper {
+    val widgetWrapper = WidgetWrapper(wrapped, classes).apply { init?.invoke(this) }
+    this.add(widgetWrapper)
+    return widgetWrapper
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/FieldLabel.kt b/src/main/kotlin/pl/treksoft/kvision/form/FieldLabel.kt
index 4684b1be..8413eb3c 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/FieldLabel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/FieldLabel.kt
@@ -46,20 +46,18 @@ open class FieldLabel(
     override fun getSnAttrs(): List<StringPair> {
         return super.getSnAttrs() + ("for" to forId)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.fieldLabel(
-            forId: String, content: String? = null, rich: Boolean = false,
-            classes: Set<String> = setOf("control-label"), init: (FieldLabel.() -> Unit)? = null
-        ): FieldLabel {
-            val fieldLabel = FieldLabel(forId, content, rich, classes).apply { init?.invoke(this) }
-            this.add(fieldLabel)
-            return fieldLabel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.fieldLabel(
+    forId: String, content: String? = null, rich: Boolean = false,
+    classes: Set<String> = setOf("control-label"), init: (FieldLabel.() -> Unit)? = null
+): FieldLabel {
+    val fieldLabel = FieldLabel(forId, content, rich, classes).apply { init?.invoke(this) }
+    this.add(fieldLabel)
+    return fieldLabel
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/FormPanel.kt b/src/main/kotlin/pl/treksoft/kvision/form/FormPanel.kt
index e8fa0a42..894ea4bc 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/FormPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/FormPanel.kt
@@ -28,6 +28,7 @@ import kotlinx.serialization.serializer
 import pl.treksoft.kvision.core.Container
 import pl.treksoft.kvision.core.StringBoolPair
 import pl.treksoft.kvision.core.StringPair
+import pl.treksoft.kvision.form.FormPanel.Companion.create
 import pl.treksoft.kvision.html.Div
 import pl.treksoft.kvision.panel.SimplePanel
 import pl.treksoft.kvision.types.KFile
@@ -390,21 +391,6 @@ open class FormPanel<K : Any>(
     }
 
     companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        inline fun <reified K : Any> Container.formPanel(
-            method: FormMethod? = null, action: String? = null, enctype: FormEnctype? = null,
-            type: FormType? = null, condensed: Boolean = false, classes: Set<String> = setOf(),
-            noinline init: (FormPanel<K>.() -> Unit)? = null
-        ): FormPanel<K> {
-            val formPanel = create<K>(method, action, enctype, type, condensed, classes)
-            init?.invoke(formPanel)
-            this.add(formPanel)
-            return formPanel
-        }
 
         @UseExperimental(ImplicitReflectionSerializer::class)
         inline fun <reified K : Any> create(
@@ -419,3 +405,19 @@ open class FormPanel<K : Any>(
 
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+inline fun <reified K : Any> Container.formPanel(
+    method: FormMethod? = null, action: String? = null, enctype: FormEnctype? = null,
+    type: FormType? = null, condensed: Boolean = false, classes: Set<String> = setOf(),
+    noinline init: (FormPanel<K>.() -> Unit)? = null
+): FormPanel<K> {
+    val formPanel = create<K>(method, action, enctype, type, condensed, classes)
+    init?.invoke(formPanel)
+    this.add(formPanel)
+    return formPanel
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBox.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBox.kt
index cb962850..ac25b30d 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBox.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBox.kt
@@ -191,19 +191,19 @@ open class CheckBox(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.checkBox(
-            value: Boolean = false, name: String? = null, label: String? = null,
-            rich: Boolean = false, init: (CheckBox.() -> Unit)? = null
-        ): CheckBox {
-            val checkBox = CheckBox(value, name, label, rich).apply { init?.invoke(this) }
-            this.add(checkBox)
-            return checkBox
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.checkBox(
+    value: Boolean = false, name: String? = null, label: String? = null,
+    rich: Boolean = false, init: (CheckBox.() -> Unit)? = null
+): CheckBox {
+    val checkBox = CheckBox(value, name, label, rich).apply { init?.invoke(this) }
+    this.add(checkBox)
+    return checkBox
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBoxInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBoxInput.kt
index ea58268d..ea8bf7db 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBoxInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/CheckBoxInput.kt
@@ -33,21 +33,18 @@ import pl.treksoft.kvision.core.Container
 open class CheckBoxInput(
     value: Boolean = false,
     classes: Set<String> = setOf()
-) : CheckInput(CheckInputType.CHECKBOX, value, classes) {
+) : CheckInput(CheckInputType.CHECKBOX, value, classes)
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.checkBoxInput(
-            value: Boolean = false,
-            classes: Set<String> = setOf(), init: (CheckInput.() -> Unit)? = null
-        ): CheckBoxInput {
-            val checkBoxInput = CheckBoxInput(value, classes).apply { init?.invoke(this) }
-            this.add(checkBoxInput)
-            return checkBoxInput
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.checkBoxInput(
+    value: Boolean = false,
+    classes: Set<String> = setOf(), init: (CheckInput.() -> Unit)? = null
+): CheckBoxInput {
+    val checkBoxInput = CheckBoxInput(value, classes).apply { init?.invoke(this) }
+    this.add(checkBoxInput)
+    return checkBoxInput
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/Radio.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/Radio.kt
index e9551196..bb73da60 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/Radio.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/Radio.kt
@@ -206,19 +206,19 @@ open class Radio(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.radio(
-            value: Boolean = false, extraValue: String? = null, name: String? = null, label: String? = null,
-            rich: Boolean = false, init: (Radio.() -> Unit)? = null
-        ): Radio {
-            val radio = Radio(value, extraValue, name, label, rich).apply { init?.invoke(this) }
-            this.add(radio)
-            return radio
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.radio(
+    value: Boolean = false, extraValue: String? = null, name: String? = null, label: String? = null,
+    rich: Boolean = false, init: (Radio.() -> Unit)? = null
+): Radio {
+    val radio = Radio(value, extraValue, name, label, rich).apply { init?.invoke(this) }
+    this.add(radio)
+    return radio
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroup.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroup.kt
index 14b426a3..bee57db4 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroup.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroup.kt
@@ -227,19 +227,19 @@ open class RadioGroup(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.radioGroup(
-            options: List<StringPair>? = null, value: String? = null, name: String? = null, inline: Boolean = false,
-            label: String? = null, rich: Boolean = false, init: (RadioGroup.() -> Unit)? = null
-        ): RadioGroup {
-            val radioGroup = RadioGroup(options, value, name, inline, label, rich).apply { init?.invoke(this) }
-            this.add(radioGroup)
-            return radioGroup
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.radioGroup(
+    options: List<StringPair>? = null, value: String? = null, name: String? = null, inline: Boolean = false,
+    label: String? = null, rich: Boolean = false, init: (RadioGroup.() -> Unit)? = null
+): RadioGroup {
+    val radioGroup = RadioGroup(options, value, name, inline, label, rich).apply { init?.invoke(this) }
+    this.add(radioGroup)
+    return radioGroup
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroupInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroupInput.kt
index d4301709..5a47c3ce 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroupInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioGroupInput.kt
@@ -174,19 +174,19 @@ open class RadioGroupInput(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.radioGroupInput(
-            options: List<StringPair>? = null, value: String? = null, name: String? = null, inline: Boolean = false,
-            init: (RadioGroupInput.() -> Unit)? = null
-        ): RadioGroupInput {
-            val radioGroupInput = RadioGroupInput(options, value, name, inline).apply { init?.invoke(this) }
-            this.add(radioGroupInput)
-            return radioGroupInput
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.radioGroupInput(
+    options: List<StringPair>? = null, value: String? = null, name: String? = null, inline: Boolean = false,
+    init: (RadioGroupInput.() -> Unit)? = null
+): RadioGroupInput {
+    val radioGroupInput = RadioGroupInput(options, value, name, inline).apply { init?.invoke(this) }
+    this.add(radioGroupInput)
+    return radioGroupInput
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioInput.kt
index 9c6a1670..72bb4cd0 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/check/RadioInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/check/RadioInput.kt
@@ -33,21 +33,18 @@ import pl.treksoft.kvision.core.Container
 open class RadioInput(
     value: Boolean = false,
     classes: Set<String> = setOf()
-) : CheckInput(CheckInputType.RADIO, value, classes) {
+) : CheckInput(CheckInputType.RADIO, value, classes)
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.radioInput(
-            value: Boolean = false,
-            classes: Set<String> = setOf(), init: (CheckInput.() -> Unit)? = null
-        ): RadioInput {
-            val checkBoxInput = RadioInput(value, classes).apply { init?.invoke(this) }
-            this.add(checkBoxInput)
-            return checkBoxInput
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.radioInput(
+    value: Boolean = false,
+    classes: Set<String> = setOf(), init: (CheckInput.() -> Unit)? = null
+): RadioInput {
+    val checkBoxInput = RadioInput(value, classes).apply { init?.invoke(this) }
+    this.add(checkBoxInput)
+    return checkBoxInput
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelect.kt b/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelect.kt
index bef14bfa..1bcef061 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelect.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelect.kt
@@ -186,24 +186,24 @@ open class SimpleSelect(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.simpleSelect(
-            options: List<StringPair>? = null,
-            value: String? = null,
-            emptyOption: Boolean = false,
-            name: String? = null,
-            label: String? = null,
-            rich: Boolean = false,
-            init: (SimpleSelect.() -> Unit)? = null
-        ): SimpleSelect {
-            val simpleSelect = SimpleSelect(options, value, emptyOption, name, label, rich).apply { init?.invoke(this) }
-            this.add(simpleSelect)
-            return simpleSelect
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.simpleSelect(
+    options: List<StringPair>? = null,
+    value: String? = null,
+    emptyOption: Boolean = false,
+    name: String? = null,
+    label: String? = null,
+    rich: Boolean = false,
+    init: (SimpleSelect.() -> Unit)? = null
+): SimpleSelect {
+    val simpleSelect = SimpleSelect(options, value, emptyOption, name, label, rich).apply { init?.invoke(this) }
+    this.add(simpleSelect)
+    return simpleSelect
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelectInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelectInput.kt
index 31d32052..bc99f514 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelectInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/select/SimpleSelectInput.kt
@@ -199,21 +199,18 @@ open class SimpleSelectInput(
     override fun blur() {
         getElementJQuery()?.blur()
     }
+}
 
-    companion object {
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.simpleSelectInput(
-            options: List<StringPair>? = null, value: String? = null, emptyOption: Boolean = false,
-            classes: Set<String> = setOf(), init: (SimpleSelectInput.() -> Unit)? = null
-        ): SimpleSelectInput {
-            val simpleSelectInput = SimpleSelectInput(options, value, emptyOption, classes).apply { init?.invoke(this) }
-            this.add(simpleSelectInput)
-            return simpleSelectInput
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.simpleSelectInput(
+    options: List<StringPair>? = null, value: String? = null, emptyOption: Boolean = false,
+    classes: Set<String> = setOf(), init: (SimpleSelectInput.() -> Unit)? = null
+): SimpleSelectInput {
+    val simpleSelectInput = SimpleSelectInput(options, value, emptyOption, classes).apply { init?.invoke(this) }
+    this.add(simpleSelectInput)
+    return simpleSelectInput
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/text/Password.kt b/src/main/kotlin/pl/treksoft/kvision/form/text/Password.kt
index 1d36516e..eb86f152 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/text/Password.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/text/Password.kt
@@ -35,23 +35,21 @@ import pl.treksoft.kvision.core.Container
 open class Password(value: String? = null, name: String? = null, label: String? = null, rich: Boolean = false) : Text(
     TextInputType.PASSWORD,
     value, name, label, rich
-) {
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.password(
-            value: String? = null,
-            name: String? = null,
-            label: String? = null,
-            rich: Boolean = false,
-            init: (Password.() -> Unit)? = null
-        ): Password {
-            val password = Password(value, name, label, rich).apply { init?.invoke(this) }
-            this.add(password)
-            return password
-        }
-    }
+)
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.password(
+    value: String? = null,
+    name: String? = null,
+    label: String? = null,
+    rich: Boolean = false,
+    init: (Password.() -> Unit)? = null
+): Password {
+    val password = Password(value, name, label, rich).apply { init?.invoke(this) }
+    this.add(password)
+    return password
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/text/Text.kt b/src/main/kotlin/pl/treksoft/kvision/form/text/Text.kt
index f493b06e..32fc1881 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/text/Text.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/text/Text.kt
@@ -66,20 +66,18 @@ open class Text(
         this.addInternal(input)
         this.addInternal(invalidFeedback)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.text(
-            type: TextInputType = TextInputType.TEXT, value: String? = null, name: String? = null,
-            label: String? = null, rich: Boolean = false, init: (Text.() -> Unit)? = null
-        ): Text {
-            val text = Text(type, value, name, label, rich).apply { init?.invoke(this) }
-            this.add(text)
-            return text
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.text(
+    type: TextInputType = TextInputType.TEXT, value: String? = null, name: String? = null,
+    label: String? = null, rich: Boolean = false, init: (Text.() -> Unit)? = null
+): Text {
+    val text = Text(type, value, name, label, rich).apply { init?.invoke(this) }
+    this.add(text)
+    return text
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/text/TextArea.kt b/src/main/kotlin/pl/treksoft/kvision/form/text/TextArea.kt
index ccf17892..47b6870c 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/text/TextArea.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/text/TextArea.kt
@@ -75,20 +75,18 @@ open class TextArea(
         this.addInternal(input)
         this.addInternal(invalidFeedback)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.textArea(
-            cols: Int? = null, rows: Int? = null, value: String? = null, name: String? = null,
-            label: String? = null, rich: Boolean = false, init: (TextArea.() -> Unit)? = null
-        ): TextArea {
-            val textArea = TextArea(cols, rows, value, name, label, rich).apply { init?.invoke(this) }
-            this.add(textArea)
-            return textArea
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.textArea(
+    cols: Int? = null, rows: Int? = null, value: String? = null, name: String? = null,
+    label: String? = null, rich: Boolean = false, init: (TextArea.() -> Unit)? = null
+): TextArea {
+    val textArea = TextArea(cols, rows, value, name, label, rich).apply { init?.invoke(this) }
+    this.add(textArea)
+    return textArea
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/text/TextAreaInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/text/TextAreaInput.kt
index 9fc89544..acad7853 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/text/TextAreaInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/text/TextAreaInput.kt
@@ -69,20 +69,18 @@ open class TextAreaInput(cols: Int? = null, rows: Int? = null, value: String? =
         }
         return sn
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.textAreaInput(
-            cols: Int? = null, rows: Int? = null, value: String? = null, classes: Set<String> = setOf(),
-            init: (TextAreaInput.() -> Unit)? = null
-        ): TextAreaInput {
-            val textAreaInput = TextAreaInput(cols, rows, value, classes).apply { init?.invoke(this) }
-            this.add(textAreaInput)
-            return textAreaInput
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.textAreaInput(
+    cols: Int? = null, rows: Int? = null, value: String? = null, classes: Set<String> = setOf(),
+    init: (TextAreaInput.() -> Unit)? = null
+): TextAreaInput {
+    val textAreaInput = TextAreaInput(cols, rows, value, classes).apply { init?.invoke(this) }
+    this.add(textAreaInput)
+    return textAreaInput
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/form/text/TextInput.kt b/src/main/kotlin/pl/treksoft/kvision/form/text/TextInput.kt
index bc6e178d..d057dcbd 100644
--- a/src/main/kotlin/pl/treksoft/kvision/form/text/TextInput.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/form/text/TextInput.kt
@@ -77,20 +77,18 @@ open class TextInput(type: TextInputType = TextInputType.TEXT, value: String? =
         }
         return sn
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.textInput(
-            type: TextInputType = TextInputType.TEXT, value: String? = null, classes: Set<String> = setOf(),
-            init: (TextInput.() -> Unit)? = null
-        ): TextInput {
-            val textInput = TextInput(type, value, classes).apply { init?.invoke(this) }
-            this.add(textInput)
-            return textInput
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.textInput(
+    type: TextInputType = TextInputType.TEXT, value: String? = null, classes: Set<String> = setOf(),
+    init: (TextInput.() -> Unit)? = null
+): TextInput {
+    val textInput = TextInput(type, value, classes).apply { init?.invoke(this) }
+    this.add(textInput)
+    return textInput
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Button.kt b/src/main/kotlin/pl/treksoft/kvision/html/Button.kt
index aaa0f735..ec1d95f5 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Button.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Button.kt
@@ -155,25 +155,23 @@ open class Button(
         }
         return this
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.button(
-            text: String,
-            icon: String? = null,
-            style: ButtonStyle = ButtonStyle.PRIMARY,
-            type: ButtonType = ButtonType.BUTTON,
-            disabled: Boolean = false,
-            classes: Set<String> = setOf(),
-            init: (Button.() -> Unit)? = null
-        ): Button {
-            val button = Button(text, icon, style, type, disabled, classes).apply { init?.invoke(this) }
-            this.add(button)
-            return button
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.button(
+    text: String,
+    icon: String? = null,
+    style: ButtonStyle = ButtonStyle.PRIMARY,
+    type: ButtonType = ButtonType.BUTTON,
+    disabled: Boolean = false,
+    classes: Set<String> = setOf(),
+    init: (Button.() -> Unit)? = null
+): Button {
+    val button = Button(text, icon, style, type, disabled, classes).apply { init?.invoke(this) }
+    this.add(button)
+    return button
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Canvas.kt b/src/main/kotlin/pl/treksoft/kvision/html/Canvas.kt
index feb9a970..840d5dc7 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Canvas.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Canvas.kt
@@ -75,20 +75,20 @@ open class Canvas(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.canvas(
-            canvasWidth: Int? = null, canvasHeight: Int? = null, classes: Set<String> = setOf(),
-            init: (Canvas.() -> Unit)? = null
-        ): Canvas {
-            val canvas =
-                Canvas(canvasWidth, canvasHeight, classes).apply { init?.invoke(this) }
-            this.add(canvas)
-            return canvas
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.canvas(
+    canvasWidth: Int? = null, canvasHeight: Int? = null, classes: Set<String> = setOf(),
+    init: (Canvas.() -> Unit)? = null
+): Canvas {
+    val canvas =
+        Canvas(canvasWidth, canvasHeight, classes).apply { init?.invoke(this) }
+    this.add(canvas)
+    return canvas
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Div.kt b/src/main/kotlin/pl/treksoft/kvision/html/Div.kt
index 42d6b496..2ffabe49 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Div.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Div.kt
@@ -46,23 +46,21 @@ open class Div(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.div(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (Div.() -> Unit)? = null
-        ): Div {
-            val div = Div(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(div)
-            return div
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.div(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (Div.() -> Unit)? = null
+): Div {
+    val div = Div(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(div)
+    return div
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Footer.kt b/src/main/kotlin/pl/treksoft/kvision/html/Footer.kt
index 8b44dfc0..c71e346f 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Footer.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Footer.kt
@@ -46,23 +46,21 @@ open class Footer(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.footer(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (Footer.() -> Unit)? = null
-        ): Footer {
-            val footer = Footer(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(footer)
-            return footer
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.footer(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (Footer.() -> Unit)? = null
+): Footer {
+    val footer = Footer(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(footer)
+    return footer
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H1.kt b/src/main/kotlin/pl/treksoft/kvision/html/H1.kt
index 894baf72..6a3ac9cc 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H1.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H1.kt
@@ -46,23 +46,21 @@ open class H1(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h1(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H1.() -> Unit)? = null
-        ): H1 {
-            val h1 = H1(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h1)
-            return h1
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h1(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H1.() -> Unit)? = null
+): H1 {
+    val h1 = H1(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h1)
+    return h1
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H2.kt b/src/main/kotlin/pl/treksoft/kvision/html/H2.kt
index 54e12b4a..7bdd3473 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H2.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H2.kt
@@ -46,23 +46,21 @@ open class H2(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h2(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H2.() -> Unit)? = null
-        ): H2 {
-            val h2 = H2(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h2)
-            return h2
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h2(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H2.() -> Unit)? = null
+): H2 {
+    val h2 = H2(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h2)
+    return h2
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H3.kt b/src/main/kotlin/pl/treksoft/kvision/html/H3.kt
index af71cdc5..1a2efdbb 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H3.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H3.kt
@@ -46,23 +46,21 @@ open class H3(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h3(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H3.() -> Unit)? = null
-        ): H3 {
-            val h3 = H3(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h3)
-            return h3
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h3(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H3.() -> Unit)? = null
+): H3 {
+    val h3 = H3(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h3)
+    return h3
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H4.kt b/src/main/kotlin/pl/treksoft/kvision/html/H4.kt
index 9c1b92ab..ae00b8a7 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H4.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H4.kt
@@ -46,23 +46,21 @@ open class H4(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h4(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H4.() -> Unit)? = null
-        ): H4 {
-            val h4 = H4(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h4)
-            return h4
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h4(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H4.() -> Unit)? = null
+): H4 {
+    val h4 = H4(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h4)
+    return h4
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H5.kt b/src/main/kotlin/pl/treksoft/kvision/html/H5.kt
index ac993c4d..c40a0658 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H5.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H5.kt
@@ -46,23 +46,21 @@ open class H5(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h5(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H5.() -> Unit)? = null
-        ): H5 {
-            val h5 = H5(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h5)
-            return h5
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h5(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H5.() -> Unit)? = null
+): H5 {
+    val h5 = H5(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h5)
+    return h5
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/H6.kt b/src/main/kotlin/pl/treksoft/kvision/html/H6.kt
index eaef18ff..048ab5df 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/H6.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/H6.kt
@@ -46,23 +46,21 @@ open class H6(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.h6(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (H6.() -> Unit)? = null
-        ): H6 {
-            val h6 = H6(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(h6)
-            return h6
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.h6(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (H6.() -> Unit)? = null
+): H6 {
+    val h6 = H6(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(h6)
+    return h6
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Header.kt b/src/main/kotlin/pl/treksoft/kvision/html/Header.kt
index 94a9c079..e62e884e 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Header.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Header.kt
@@ -46,23 +46,21 @@ open class Header(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.header(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (Header.() -> Unit)? = null
-        ): Header {
-            val header = Header(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(header)
-            return header
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.header(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (Header.() -> Unit)? = null
+): Header {
+    val header = Header(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(header)
+    return header
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Icon.kt b/src/main/kotlin/pl/treksoft/kvision/html/Icon.kt
index a9fb03db..a54df1d6 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Icon.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Icon.kt
@@ -42,19 +42,17 @@ open class Icon(icon: String) : Tag(TAG.SPAN) {
         icon.split(" ").forEach { cl.add(it to true) }
         return cl
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.icon(
-            icon: String, init: (Icon.() -> Unit)? = null
-        ): Icon {
-            val i = Icon(icon).apply { init?.invoke(this) }
-            this.add(i)
-            return i
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.icon(
+    icon: String, init: (Icon.() -> Unit)? = null
+): Icon {
+    val i = Icon(icon).apply { init?.invoke(this) }
+    this.add(i)
+    return i
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Iframe.kt b/src/main/kotlin/pl/treksoft/kvision/html/Iframe.kt
index a3a067ba..dad33ed4 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Iframe.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Iframe.kt
@@ -132,22 +132,20 @@ open class Iframe(
     open fun getIframeWindow(): Window {
         return getElementJQueryD()[0].contentWindow
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.iframe(
-            src: String? = null, srcdoc: String? = null, name: String? = null, iframeWidth: Int? = null,
-            iframeHeight: Int? = null, sandbox: Set<Sandbox>? = null, classes: Set<String> = setOf(),
-            init: (Iframe.() -> Unit)? = null
-        ): Iframe {
-            val iframe =
-                Iframe(src, srcdoc, name, iframeWidth, iframeHeight, sandbox, classes).apply { init?.invoke(this) }
-            this.add(iframe)
-            return iframe
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.iframe(
+    src: String? = null, srcdoc: String? = null, name: String? = null, iframeWidth: Int? = null,
+    iframeHeight: Int? = null, sandbox: Set<Sandbox>? = null, classes: Set<String> = setOf(),
+    init: (Iframe.() -> Unit)? = null
+): Iframe {
+    val iframe =
+        Iframe(src, srcdoc, name, iframeWidth, iframeHeight, sandbox, classes).apply { init?.invoke(this) }
+    this.add(iframe)
+    return iframe
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Image.kt b/src/main/kotlin/pl/treksoft/kvision/html/Image.kt
index 81873088..6496b042 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Image.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Image.kt
@@ -99,20 +99,18 @@ open class Image(
         }
         return cl
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.image(
-            src: ResString, alt: String? = null, responsive: Boolean = false, shape: ImageShape? = null,
-            centered: Boolean = false, classes: Set<String> = setOf(), init: (Image.() -> Unit)? = null
-        ): Image {
-            val image = Image(src, alt, responsive, shape, centered, classes).apply { init?.invoke(this) }
-            this.add(image)
-            return image
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.image(
+    src: ResString, alt: String? = null, responsive: Boolean = false, shape: ImageShape? = null,
+    centered: Boolean = false, classes: Set<String> = setOf(), init: (Image.() -> Unit)? = null
+): Image {
+    val image = Image(src, alt, responsive, shape, centered, classes).apply { init?.invoke(this) }
+    this.add(image)
+    return image
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Link.kt b/src/main/kotlin/pl/treksoft/kvision/html/Link.kt
index 63104248..2c2f1723 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Link.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Link.kt
@@ -83,20 +83,18 @@ open class Link(
         }
         return this
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.link(
-            label: String, url: String? = null, icon: String? = null, image: ResString? = null,
-            classes: Set<String> = setOf(), init: (Link.() -> Unit)? = null
-        ): Link {
-            val link = Link(label, url, icon, image, classes).apply { init?.invoke(this) }
-            this.add(link)
-            return link
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.link(
+    label: String, url: String? = null, icon: String? = null, image: ResString? = null,
+    classes: Set<String> = setOf(), init: (Link.() -> Unit)? = null
+): Link {
+    val link = Link(label, url, icon, image, classes).apply { init?.invoke(this) }
+    this.add(link)
+    return link
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/List.kt b/src/main/kotlin/pl/treksoft/kvision/html/List.kt
index cf3f8be6..1d26007c 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/List.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/List.kt
@@ -133,20 +133,18 @@ open class ListTag(
         }
         return cl
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.listTag(
-            type: ListType, elements: List<String>? = null, rich: Boolean = false,
-            classes: Set<String> = setOf(), init: (ListTag.() -> Unit)? = null
-        ): ListTag {
-            val listTag = ListTag(type, elements, rich, classes, init)
-            this.add(listTag)
-            return listTag
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.listTag(
+    type: ListType, elements: List<String>? = null, rich: Boolean = false,
+    classes: Set<String> = setOf(), init: (ListTag.() -> Unit)? = null
+): ListTag {
+    val listTag = ListTag(type, elements, rich, classes, init)
+    this.add(listTag)
+    return listTag
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/P.kt b/src/main/kotlin/pl/treksoft/kvision/html/P.kt
index feadc54a..d5bb2c4d 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/P.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/P.kt
@@ -46,23 +46,21 @@ open class P(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.p(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (P.() -> Unit)? = null
-        ): P {
-            val p = P(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(p)
-            return p
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.p(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (P.() -> Unit)? = null
+): P {
+    val p = P(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(p)
+    return p
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Section.kt b/src/main/kotlin/pl/treksoft/kvision/html/Section.kt
index 94413943..43dd8fcf 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Section.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Section.kt
@@ -46,23 +46,21 @@ open class Section(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.section(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (Section.() -> Unit)? = null
-        ): Section {
-            val section = Section(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(section)
-            return section
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.section(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (Section.() -> Unit)? = null
+): Section {
+    val section = Section(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(section)
+    return section
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Span.kt b/src/main/kotlin/pl/treksoft/kvision/html/Span.kt
index bc5e93cd..862d0b2f 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Span.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Span.kt
@@ -46,23 +46,21 @@ open class Span(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.span(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(),
-            init: (Span.() -> Unit)? = null
-        ): Span {
-            val span = Span(content, rich, align, classes).apply { init?.invoke(this) }
-            this.add(span)
-            return span
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.span(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(),
+    init: (Span.() -> Unit)? = null
+): Span {
+    val span = Span(content, rich, align, classes).apply { init?.invoke(this) }
+    this.add(span)
+    return span
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/html/Tag.kt b/src/main/kotlin/pl/treksoft/kvision/html/Tag.kt
index a5e855ae..aefd3730 100644
--- a/src/main/kotlin/pl/treksoft/kvision/html/Tag.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/html/Tag.kt
@@ -192,21 +192,19 @@ open class Tag(
         else
             content += translate(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.tag(
-            type: TAG, content: String? = null, rich: Boolean = false, align: Align? = null,
-            classes: Set<String> = setOf(), attributes: Map<String, String> = mapOf(),
-            init: (Tag.() -> Unit)? = null
-        ): Tag {
-            val tag = Tag(type, content, rich, align, classes, attributes, init)
-            this.add(tag)
-            return tag
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.tag(
+    type: TAG, content: String? = null, rich: Boolean = false, align: Align? = null,
+    classes: Set<String> = setOf(), attributes: Map<String, String> = mapOf(),
+    init: (Tag.() -> Unit)? = null
+): Tag {
+    val tag = Tag(type, content, rich, align, classes, attributes, init)
+    this.add(tag)
+    return tag
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/DockPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/DockPanel.kt
index b871abfa..59c61637 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/DockPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/DockPanel.kt
@@ -197,17 +197,15 @@ open class DockPanel(classes: Set<String> = setOf(), init: (DockPanel.() -> Unit
         removeAt(Side.DOWN)
         return this
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.dockPanel(classes: Set<String> = setOf(), init: (DockPanel.() -> Unit)? = null): DockPanel {
-            val dockPanel = DockPanel(classes, init)
-            this.add(dockPanel)
-            return dockPanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.dockPanel(classes: Set<String> = setOf(), init: (DockPanel.() -> Unit)? = null): DockPanel {
+    val dockPanel = DockPanel(classes, init)
+    this.add(dockPanel)
+    return dockPanel
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/FlexPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/FlexPanel.kt
index 010f7cba..436ade22 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/FlexPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/FlexPanel.kt
@@ -218,23 +218,21 @@ open class FlexPanel(
         }
         return snstyle
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.flexPanel(
-            direction: FlexDir? = null, wrap: FlexWrap? = null, justify: FlexJustify? = null,
-            alignItems: FlexAlignItems? = null, alignContent: FlexAlignContent? = null,
-            spacing: Int? = null, classes: Set<String> = setOf(), init: (FlexPanel.() -> Unit)? = null
-        ): FlexPanel {
-            val flexPanel = FlexPanel(direction, wrap, justify, alignItems, alignContent, spacing, classes, init)
-            this.add(flexPanel)
-            return flexPanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.flexPanel(
+    direction: FlexDir? = null, wrap: FlexWrap? = null, justify: FlexJustify? = null,
+    alignItems: FlexAlignItems? = null, alignContent: FlexAlignContent? = null,
+    spacing: Int? = null, classes: Set<String> = setOf(), init: (FlexPanel.() -> Unit)? = null
+): FlexPanel {
+    val flexPanel = FlexPanel(direction, wrap, justify, alignItems, alignContent, spacing, classes, init)
+    this.add(flexPanel)
+    return flexPanel
 }
 
 /**
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/GridPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/GridPanel.kt
index 1f5efbb4..1598753b 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/GridPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/GridPanel.kt
@@ -255,28 +255,26 @@ open class GridPanel(
         }
         return snstyle
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.gridPanel(
-            autoColumns: String? = null, autoRows: String? = null, autoFlow: GridFlow? = null,
-            templateColumns: String? = null, templateRows: String? = null, templateAreas: List<String>? = null,
-            columnGap: Int? = null, rowGap: Int? = null, justifyItems: GridJustify? = null,
-            alignItems: GridAlign? = null, justifyContent: GridJustifyContent? = null,
-            alignContent: GridAlignContent? = null, classes: Set<String> = setOf(), init: (GridPanel.() -> Unit)? = null
-        ): GridPanel {
-            val gridPanel = GridPanel(
-                autoColumns, autoRows, autoFlow, templateColumns, templateRows, templateAreas,
-                columnGap, rowGap, justifyItems, alignItems, justifyContent, alignContent, classes, init
-            )
-            this.add(gridPanel)
-            return gridPanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.gridPanel(
+    autoColumns: String? = null, autoRows: String? = null, autoFlow: GridFlow? = null,
+    templateColumns: String? = null, templateRows: String? = null, templateAreas: List<String>? = null,
+    columnGap: Int? = null, rowGap: Int? = null, justifyItems: GridJustify? = null,
+    alignItems: GridAlign? = null, justifyContent: GridJustifyContent? = null,
+    alignContent: GridAlignContent? = null, classes: Set<String> = setOf(), init: (GridPanel.() -> Unit)? = null
+): GridPanel {
+    val gridPanel = GridPanel(
+        autoColumns, autoRows, autoFlow, templateColumns, templateRows, templateAreas,
+        columnGap, rowGap, justifyItems, alignItems, justifyContent, alignContent, classes, init
+    )
+    this.add(gridPanel)
+    return gridPanel
 }
 
 class GridWrapper(
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/HPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/HPanel.kt
index 0700e88a..ccc77b0f 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/HPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/HPanel.kt
@@ -47,24 +47,22 @@ open class HPanel(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.hPanel(
-            wrap: FlexWrap? = null,
-            justify: FlexJustify? = null,
-            alignItems: FlexAlignItems? = null,
-            spacing: Int? = null,
-            classes: Set<String> = setOf(),
-            init: (HPanel.() -> Unit)? = null
-        ): HPanel {
-            val hpanel = HPanel(wrap, justify, alignItems, spacing, classes, init)
-            this.add(hpanel)
-            return hpanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.hPanel(
+    wrap: FlexWrap? = null,
+    justify: FlexJustify? = null,
+    alignItems: FlexAlignItems? = null,
+    spacing: Int? = null,
+    classes: Set<String> = setOf(),
+    init: (HPanel.() -> Unit)? = null
+): HPanel {
+    val hpanel = HPanel(wrap, justify, alignItems, spacing, classes, init)
+    this.add(hpanel)
+    return hpanel
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/Root.kt b/src/main/kotlin/pl/treksoft/kvision/panel/Root.kt
index 7d06428a..111d4738 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/Root.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/Root.kt
@@ -211,30 +211,29 @@ class Root : SimplePanel {
         fun removeModal(modal: Widget) {
             modals.remove(modal)
         }
+    }
+}
 
-        /**
-         * Create new Root container based on ID
-         * @param id ID attribute of element in the main HTML file
-         * @param fixed if false, the container is rendered with Bootstrap "container-fluid" class,
-         * otherwise it's rendered with "container" class (default is false)
-         * @param init an initializer extension function
-         * @return the created Root container
-         */
-        fun Application.root(id: String, fixed: Boolean = false, init: Root.() -> Unit): Root {
-            return Root(id, fixed, init)
-        }
-
-        /**
-         * Create new Root container based on HTML element
-         * @param element HTML element in the DOM tree
-         * @param fixed if false, the container is rendered with Bootstrap "container-fluid" class,
-         * otherwise it's rendered with "container" class (default is false)
-         * @param init an initializer extension function
-         * @return the created Root container
-         */
-        fun Application.root(element: HTMLElement, fixed: Boolean = false, init: Root.() -> Unit): Root {
-            return Root(element, fixed, init)
-        }
+/**
+ * Create new Root container based on ID
+ * @param id ID attribute of element in the main HTML file
+ * @param fixed if false, the container is rendered with Bootstrap "container-fluid" class,
+ * otherwise it's rendered with "container" class (default is false)
+ * @param init an initializer extension function
+ * @return the created Root container
+ */
+fun Application.root(id: String, fixed: Boolean = false, init: Root.() -> Unit): Root {
+    return Root(id, fixed, init)
+}
 
-    }
+/**
+ * Create new Root container based on HTML element
+ * @param element HTML element in the DOM tree
+ * @param fixed if false, the container is rendered with Bootstrap "container-fluid" class,
+ * otherwise it's rendered with "container" class (default is false)
+ * @param init an initializer extension function
+ * @return the created Root container
+ */
+fun Application.root(element: HTMLElement, fixed: Boolean = false, init: Root.() -> Unit): Root {
+    return Root(element, fixed, init)
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/SimplePanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/SimplePanel.kt
index 91eeda80..915fa6a7 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/SimplePanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/SimplePanel.kt
@@ -101,17 +101,15 @@ open class SimplePanel(classes: Set<String> = setOf(), init: (SimplePanel.() ->
         children.forEach { it.dispose() }
         removeAll()
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.simplePanel(classes: Set<String> = setOf(), init: (SimplePanel.() -> Unit)? = null): SimplePanel {
-            val simplePanel = SimplePanel(classes, init)
-            this.add(simplePanel)
-            return simplePanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.simplePanel(classes: Set<String> = setOf(), init: (SimplePanel.() -> Unit)? = null): SimplePanel {
+    val simplePanel = SimplePanel(classes, init)
+    this.add(simplePanel)
+    return simplePanel
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/SplitPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/SplitPanel.kt
index 8b46ae0b..c7f4b3ac 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/SplitPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/SplitPanel.kt
@@ -98,22 +98,20 @@ open class SplitPanel(
             arrayOf()
         }
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.splitPanel(
-            direction: Direction = Direction.VERTICAL,
-            classes: Set<String> = setOf(), init: (SplitPanel.() -> Unit)? = null
-        ): SplitPanel {
-            val splitPanel = SplitPanel(direction, classes, init)
-            this.add(splitPanel)
-            return splitPanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.splitPanel(
+    direction: Direction = Direction.VERTICAL,
+    classes: Set<String> = setOf(), init: (SplitPanel.() -> Unit)? = null
+): SplitPanel {
+    val splitPanel = SplitPanel(direction, classes, init)
+    this.add(splitPanel)
+    return splitPanel
 }
 
 internal class Splitter(private val splitPanel: SplitPanel, direction: Direction) : Tag(
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/StackPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/StackPanel.kt
index 37dd449b..26bfcb8c 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/StackPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/StackPanel.kt
@@ -118,18 +118,18 @@ open class StackPanel(
 
     companion object {
         internal var counter = 0
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.stackPanel(
-            activateLast: Boolean = true, classes: Set<String> = setOf(), init: (StackPanel.() -> Unit)? = null
-        ): StackPanel {
-            val stackPanel = StackPanel(activateLast, classes, init)
-            this.add(stackPanel)
-            return stackPanel
-        }
     }
 }
+
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.stackPanel(
+    activateLast: Boolean = true, classes: Set<String> = setOf(), init: (StackPanel.() -> Unit)? = null
+): StackPanel {
+    val stackPanel = StackPanel(activateLast, classes, init)
+    this.add(stackPanel)
+    return stackPanel
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/panel/VPanel.kt b/src/main/kotlin/pl/treksoft/kvision/panel/VPanel.kt
index eb9c138e..e5d275d4 100644
--- a/src/main/kotlin/pl/treksoft/kvision/panel/VPanel.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/panel/VPanel.kt
@@ -46,20 +46,18 @@ open class VPanel(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.vPanel(
-            justify: FlexJustify? = null, alignItems: FlexAlignItems? = null, spacing: Int? = null,
-            classes: Set<String> = setOf(), init: (VPanel.() -> Unit)? = null
-        ): VPanel {
-            val vpanel = VPanel(justify, alignItems, spacing, classes, init)
-            this.add(vpanel)
-            return vpanel
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.vPanel(
+    justify: FlexJustify? = null, alignItems: FlexAlignItems? = null, spacing: Int? = null,
+    classes: Set<String> = setOf(), init: (VPanel.() -> Unit)? = null
+): VPanel {
+    val vpanel = VPanel(justify, alignItems, spacing, classes, init)
+    this.add(vpanel)
+    return vpanel
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
index adb7d3be..20cb2d8e 100644
--- a/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
@@ -49,7 +49,7 @@ class StateBinding<S : Any, CONT : Container, CONTENT>(
         }
     }
 
-    private fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
+    internal fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
         this.updateState = updateState
     }
 
@@ -57,32 +57,30 @@ class StateBinding<S : Any, CONT : Container, CONTENT>(
         unsubscribe()
         super.dispose()
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, CONT : Container> CONT.stateBinding(
-            observableState: ObservableState<S>,
-            factory: (CONT.(S) -> Unit)
-        ): StateBinding<S, CONT, Unit> {
-            return StateBinding(observableState, this, factory)
-        }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun <S : Any, CONT : Container> CONT.stateBinding(
+    observableState: ObservableState<S>,
+    factory: (CONT.(S) -> Unit)
+): StateBinding<S, CONT, Unit> {
+    return StateBinding(observableState, this, factory)
+}
 
-        /**
-         * DSL builder extension function for updateable redux content.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, CONT : Container, CONTENT> CONT.stateUpdate(
-            observableState: ObservableState<S>,
-            factory: (CONT.(S) -> CONTENT)
-        ): Updateable<S, CONTENT> {
-            return Updateable(StateBinding(observableState, this, factory)::setUpdateState)
-        }
-    }
+/**
+ * DSL builder extension function for updateable redux content.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun <S : Any, CONT : Container, CONTENT> CONT.stateUpdate(
+    observableState: ObservableState<S>,
+    factory: (CONT.(S) -> CONTENT)
+): Updateable<S, CONTENT> {
+    return Updateable(StateBinding(observableState, this, factory)::setUpdateState)
 }
 
 /**
diff --git a/src/main/kotlin/pl/treksoft/kvision/table/Cell.kt b/src/main/kotlin/pl/treksoft/kvision/table/Cell.kt
index 44646897..4cf72f77 100644
--- a/src/main/kotlin/pl/treksoft/kvision/table/Cell.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/table/Cell.kt
@@ -47,39 +47,36 @@ open class Cell(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Row.cell(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(), init: (Cell.() -> Unit)? = null
-        ): Cell {
-            val cell = Cell(content, rich, align, classes, init)
-            this.add(cell)
-            return cell
-        }
-
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Row.thcell(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            classes: Set<String> = setOf(), init: (HeaderCell.() -> Unit)? = null
-        ): HeaderCell {
-            val headerCell = HeaderCell(content, rich, align, Scope.ROW, classes, init)
-            this.add(headerCell)
-            return headerCell
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Row.cell(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(), init: (Cell.() -> Unit)? = null
+): Cell {
+    val cell = Cell(content, rich, align, classes, init)
+    this.add(cell)
+    return cell
+}
 
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Row.thcell(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    classes: Set<String> = setOf(), init: (HeaderCell.() -> Unit)? = null
+): HeaderCell {
+    val headerCell = HeaderCell(content, rich, align, Scope.ROW, classes, init)
+    this.add(headerCell)
+    return headerCell
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/table/HeaderCell.kt b/src/main/kotlin/pl/treksoft/kvision/table/HeaderCell.kt
index 14527f0f..f7f45784 100644
--- a/src/main/kotlin/pl/treksoft/kvision/table/HeaderCell.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/table/HeaderCell.kt
@@ -57,24 +57,21 @@ open class HeaderCell(
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Row.headerCell(
-            content: String? = null,
-            rich: Boolean = false,
-            align: Align? = null,
-            scope: Scope? = null,
-            classes: Set<String> = setOf(), init: (HeaderCell.() -> Unit)? = null
-        ): HeaderCell {
-            val cell = HeaderCell(content, rich, align, scope, classes, init)
-            this.add(cell)
-            return cell
-        }
-    }
-
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Row.headerCell(
+    content: String? = null,
+    rich: Boolean = false,
+    align: Align? = null,
+    scope: Scope? = null,
+    classes: Set<String> = setOf(), init: (HeaderCell.() -> Unit)? = null
+): HeaderCell {
+    val cell = HeaderCell(content, rich, align, scope, classes, init)
+    this.add(cell)
+    return cell
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/table/Row.kt b/src/main/kotlin/pl/treksoft/kvision/table/Row.kt
index 34ce3471..0681953f 100644
--- a/src/main/kotlin/pl/treksoft/kvision/table/Row.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/table/Row.kt
@@ -34,25 +34,21 @@ import pl.treksoft.kvision.html.Tag
 open class Row(classes: Set<String> = setOf(), init: (Row.() -> Unit)? = null) : Tag(
     TAG.TR, classes = classes
 ) {
-
     init {
         @Suppress("LeakingThis")
         init?.invoke(this)
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Table.row(
-            classes: Set<String> = setOf(), init: (Row.() -> Unit)? = null
-        ): Row {
-            val row = Row(classes, init)
-            this.add(row)
-            return row
-        }
-    }
-
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Table.row(
+    classes: Set<String> = setOf(), init: (Row.() -> Unit)? = null
+): Row {
+    val row = Row(classes, init)
+    this.add(row)
+    return row
 }
diff --git a/src/main/kotlin/pl/treksoft/kvision/table/Table.kt b/src/main/kotlin/pl/treksoft/kvision/table/Table.kt
index 6d7c9b6e..114e3dfa 100644
--- a/src/main/kotlin/pl/treksoft/kvision/table/Table.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/table/Table.kt
@@ -200,22 +200,20 @@ open class Table(
     override fun getChildren(): List<Component> {
         return tbody.getChildren()
     }
+}
 
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun Container.table(
-            headerNames: List<String>? = null,
-            types: Set<TableType> = setOf(), caption: String? = null, responsiveType: ResponsiveType? = null,
-            theadType: TheadType? = null, classes: Set<String> = setOf(), init: (Table.() -> Unit)? = null
-        ): Table {
-            val table =
-                Table(headerNames, types, caption, responsiveType, theadType, classes, init)
-            this.add(table)
-            return table
-        }
-    }
+/**
+ * DSL builder extension function.
+ *
+ * It takes the same parameters as the constructor of the built component.
+ */
+fun Container.table(
+    headerNames: List<String>? = null,
+    types: Set<TableType> = setOf(), caption: String? = null, responsiveType: ResponsiveType? = null,
+    theadType: TheadType? = null, classes: Set<String> = setOf(), init: (Table.() -> Unit)? = null
+): Table {
+    val table =
+        Table(headerNames, types, caption, responsiveType, theadType, classes, init)
+    this.add(table)
+    return table
 }
-- 
cgit