From eb52d41e4f148a7cfbbc157cfbfc30551e28a220 Mon Sep 17 00:00:00 2001
From: Cagatay Civici <cagatay.civici@gmail.com>
Date: Tue, 22 Sep 2020 14:22:00 +0300
Subject: [PATCH] Migrated accordion to V3

---
 src/components/accordion/Accordion.vue       |  98 +++++-
 src/components/accordiontab/AccordionTab.vue |  60 +---
 src/views/accordion/AccordionDemo.vue        |  38 ++-
 src/views/accordion/AccordionDoc.vue         | 309 ++++++++++---------
 src/views/tabview/TabViewDemo.vue            |  10 +-
 src/views/tabview/TabViewDoc.vue             |  28 +-
 6 files changed, 305 insertions(+), 238 deletions(-)

diff --git a/src/components/accordion/Accordion.vue b/src/components/accordion/Accordion.vue
index cf841b7e4..726f6c501 100755
--- a/src/components/accordion/Accordion.vue
+++ b/src/components/accordion/Accordion.vue
@@ -1,24 +1,110 @@
 <template>
     <div class="p-accordion p-component">
-        <slot></slot>
+        <div v-for="(tab,i) of tabs" :key="getKey(tab,i)" :class="getTabClass(i)">
+            <div :class="getTabHeaderClass(tab, i)">
+                <a role="tab" class="p-accordion-header-link" @click="onTabClick($event, tab, i)" @keydown="onTabKeydown($event, tab, i)" :tabindex="isTabDisabled(tab) ? null : '0'"
+                    :aria-expanded="isTabActive(i)" :id="getTabAriaId(i) + '_header'" :aria-controls="getTabAriaId(i) + '_content'">
+                    <span :class="getHeaderIcon(i)"></span>
+                    <span class="p-accordion-header-text" v-if="tab.props && tab.props.header">{{tab.props.header}}</span>
+                    <component :is="tab.children.header" v-if="tab.children && tab.children.header"></component>
+                </a>
+            </div>
+            <transition name="p-toggleable-content">
+                <div class="p-toggleable-content" v-show="isTabActive(i)"
+                    role="region" :id="getTabAriaId(i) + '_content'" :aria-labelledby="getTabAriaId(i) + '_header'">
+                    <div class="p-accordion-content">
+                        <component :is="tab"></component>
+                    </div>
+                </div>
+            </transition>
+        </div>
     </div>
 </template>
 
 <script>
+import UniqueComponentId from '../utils/UniqueComponentId';
+
 export default {
     props: {
-        multiple: Boolean
+        multiple: Boolean,
+        activeIndex: [Number,Array]
+    },
+    data() {
+        return {
+            d_activeIndex: this.activeIndex
+        }
+    },
+    watch: {
+        activeIndex(newValue) {
+            this.d_activeIndex = newValue;
+        }
     },
     methods: {
-        onToggle(tab) {
-            if (!this.multiple && !tab.d_active) {
-                this.$children.forEach(tab => tab.d_active = false);
+        onTabClick(event, tab, i) {
+            if (!this.isTabDisabled(tab)) {
+                const active = this.isTabActive(i);
+                const eventName = active ? 'tab-close' : 'tab-open';
+
+                if (this.multiple) {
+                    if (active) {
+                        this.d_activeIndex = this.d_activeIndex.filter(index => index !== i);
+                    }
+                    else {
+                        if (this.d_activeIndex)
+                            this.d_activeIndex.push(i);
+                        else
+                            this.d_activeIndex = [i];
+                    }
+                }
+                else {
+                    this.d_activeIndex = this.d_activeIndex === i ? null : i;
+                }
+
+                this.$emit('update:activeIndex', this.d_activeIndex);
+
+                this.$emit(eventName, {
+                    originalEvent: event,
+                    index: i
+                });
             }
+        },
+        onTabKeydown(event, tab, i) {
+            if (event.which === 13) {
+                this.onTabClick(event, i);
+            }
+        },
+        isTabActive(index) {
+            if (this.multiple)
+                return this.d_activeIndex && this.d_activeIndex.includes(index);
+            else
+                return index === this.d_activeIndex;
+        },
+        getKey(tab, i) {
+            return tab.props && tab.props.header ? tab.props.header : i;
+        },
+        isTabDisabled(tab) {
+            return tab.props && tab.props.disabled;
+        },
+        getTabClass(i) {
+            return ['p-accordion-tab', {'p-accordion-tab-active': this.isTabActive(i)}];
+        },
+        getTabHeaderClass(tab, i) {
+            return ['p-accordion-header', {'p-highlight': this.isTabActive(i), 'p-disabled': this.isTabDisabled(tab)}];
+        },
+        getTabAriaId(i) {
+            return this.ariaId + + '_' + i;
+        },
+        getHeaderIcon(i) {
+            const active = this.isTabActive(i);
+            return ['p-accordion-toggle-icon pi', {'pi-chevron-right': !active, 'pi-chevron-down': active}];
         }
     },
     computed: {
         tabs() {
-            return this.$children.filter(child => child.$vnode.tag.indexOf('accordiontab') !== -1);
+            return this.$slots.default().filter(child => child.type.name === 'accordiontab');
+        },
+        ariaId() {
+            return UniqueComponentId();
         }
     }
 }
diff --git a/src/components/accordiontab/AccordionTab.vue b/src/components/accordiontab/AccordionTab.vue
index 9c1b31d42..3b49a54c4 100755
--- a/src/components/accordiontab/AccordionTab.vue
+++ b/src/components/accordiontab/AccordionTab.vue
@@ -1,69 +1,13 @@
 <template>
-    <div :class="['p-accordion-tab', {'p-accordion-tab-active': d_active}]">
-        <div :class="['p-accordion-header', {'p-highlight': d_active, 'p-disabled': disabled}]">
-            <a role="tab" class="p-accordion-header-link" @click="onTabClick" @keydown="onTabKeydown" :tabindex="disabled ? null : '0'"
-                :aria-expanded="d_active" :id="ariaId + '_header'" :aria-controls="ariaId + '_content'">
-                <span :class="['p-accordion-toggle-icon pi', {'pi-chevron-right': !d_active, 'pi-chevron-down': d_active}]"></span>
-                <span class="p-accordion-header-text" v-if="header">{{header}}</span>
-                <slot name="header"></slot>
-            </a>
-        </div>
-        <transition name="p-toggleable-content">
-            <div class="p-toggleable-content" v-show="d_active"
-                role="region" :id="ariaId + '_content' " :aria-labelledby="ariaId + '_header'">
-                <div class="p-accordion-content">
-                    <slot></slot>
-                </div>
-            </div>
-        </transition>
-    </div>
+    <slot></slot>
 </template>
 
 <script>
-import UniqueComponentId from '../utils/UniqueComponentId';
-
 export default {
+    name: 'accordiontab',
     props: {
         header: null,
-        active: Boolean,
         disabled: Boolean
-    },
-    data() {
-        return {
-            d_active: this.active
-        }
-    },
-    watch: {
-        active(newValue) {
-            this.d_active = newValue;
-        }
-    },
-    methods: {
-        onTabClick(event) {
-            if (!this.disabled) {
-                this.$parent.onToggle(this);
-
-                const newActiveState = !this.d_active;
-                this.d_active = newActiveState;
-                this.$emit('update:active', newActiveState);
-
-                let eventName = newActiveState ? 'tab-open' : 'tab-close';
-                this.$parent.$emit(eventName, {
-                    originalEvent: event,
-                    tab: this
-                });
-            }
-        },
-        onTabKeydown(event) {
-            if (event.which === 13) {
-                this.onTabClick(event);
-            }
-        }
-    },
-    computed: {
-        ariaId() {
-            return UniqueComponentId();
-        }
     }
 }
 </script>
\ No newline at end of file
diff --git a/src/views/accordion/AccordionDemo.vue b/src/views/accordion/AccordionDemo.vue
index a2a207f50..3e4a63e06 100755
--- a/src/views/accordion/AccordionDemo.vue
+++ b/src/views/accordion/AccordionDemo.vue
@@ -10,8 +10,8 @@
         <div class="content-section implementation">
             <div class="card">
                 <h5>Default</h5>
-                <Accordion>
-                    <AccordionTab header="Header I" :active="true">
+                <Accordion :activeIndex="0">
+                    <AccordionTab header="Header I">
                         <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
                             ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
                             Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
@@ -29,8 +29,8 @@
                 </Accordion>
 
                 <h5>Multiple</h5>
-                <Accordion :multiple="true">
-                    <AccordionTab header="Header I" :active="true">
+                <Accordion :multiple="true" :activeIndex="[0]">
+                    <AccordionTab header="Header I">
                         <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
                             ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
                             Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
@@ -50,24 +50,24 @@
                 </Accordion>
 
                 <h5>Programmatic</h5>
-                <div style="padding: .5em 0 1em 0">
-                    <Button :icon="active1 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 1st" @click="active1 = !active1" class="p-button-text" />
-                    <Button :icon="active2 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 2nd" @click="active2 = !active2" class="p-button-text" style="margin-left: .5em" />
-                    <Button :icon="active3 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 3rd" @click="active3 = !active3" class="p-button-text" style="margin-left: .5em" />
+                <div class="p-pb-3">
+                    <Button @click="active = 0" class="p-button-text" label="Activate 1st" />
+                    <Button @click="active = 1" class="p-button-text  p-mr-2" label="Activate 2nd" />
+                    <Button @click="active = 2" class="p-button-text  p-mr-2" label="Activate 3rd" />
                 </div>
 
-                <Accordion :multiple="true">
-                    <AccordionTab header="Header I" :active="active1">
+                <Accordion v-model:activeIndex="active">
+                    <AccordionTab header="Header I">
                         <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
                             ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
                             Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
                     </AccordionTab>
-                    <AccordionTab header="Header II" :active="active2">
+                    <AccordionTab header="Header II">
                         <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
                             architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
                             voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.</p>
                     </AccordionTab>
-                    <AccordionTab header="Header III" :active="active3">
+                    <AccordionTab header="Header III">
                         <p>At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
                             cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
                             Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.</p>
@@ -75,9 +75,9 @@
                 </Accordion>
 
                 <h5>Custom Headers</h5>
-                <Accordion class="accordion-custom">
-                    <AccordionTab :active="true">
-                        <template v-slot:header>
+                <Accordion class="accordion-custom" :activeIndex="0">
+                    <AccordionTab>
+                        <template #header>
                             <i class="pi pi-calendar"></i>
                             <span>Header I</span>
                         </template>
@@ -86,7 +86,7 @@
                             Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
                     </AccordionTab>
                     <AccordionTab>
-                        <template v-slot:header>
+                        <template #header>
                             <i class="pi pi-user"></i>
                             <span>Header II</span>
                         </template>
@@ -95,7 +95,7 @@
                             voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.</p>
                     </AccordionTab>
                     <AccordionTab>
-                        <template v-slot:header>
+                        <template #header>
                             <i class="pi pi-search"></i>
                             <span>Header III</span>
                             <i class="pi pi-cog"></i>
@@ -118,9 +118,7 @@ import AccordionDoc from './AccordionDoc';
 export default {
     data() {
         return {
-            active1: true,
-            active2: false,
-            active3: false
+            active: 0
         }
     },
     components: {
diff --git a/src/views/accordion/AccordionDoc.vue b/src/views/accordion/AccordionDoc.vue
index 7e67b5b62..5c9ad2b9b 100755
--- a/src/views/accordion/AccordionDoc.vue
+++ b/src/views/accordion/AccordionDoc.vue
@@ -3,14 +3,17 @@
 		<TabView>
 			<TabPanel header="Documentation">
 				<h5>Import</h5>
-<CodeHighlight lang="javascript">
+<pre v-code.script>
+<code>
 import Accordion from 'primevue/accordion';
 import AccordionTab from 'primevue/accordiontab';
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Getting Started</h5>
 				<p>Accordion element consists of one or more AccordionTab elements. Title of the tab is defined using header attribute.</p>
-<CodeHighlight>
+<pre v-code>
+<code>
 &lt;Accordion&gt;
 	&lt;AccordionTab header="Header I"&gt;
 		Content
@@ -22,13 +25,15 @@ import AccordionTab from 'primevue/accordiontab';
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Active</h5>
-				<p>Visibility of the content is specified with the active property that supports one or two-way binding.</p>
-<CodeHighlight>
-&lt;Accordion&gt;
-	&lt;AccordionTab header="Header I" :active="true"&gt;
+				<p>Visibility of the content is specified with the <i>activeIndex</i> property that supports one or two-way binding.</p>
+<pre v-code>
+<code>
+&lt;Accordion :activeIndex="0"&gt;
+	&lt;AccordionTab header="Header I"&gt;
 		Content
 	&lt;/AccordionTab&gt;
 	&lt;AccordionTab header="Header II"&gt;
@@ -38,28 +43,32 @@ import AccordionTab from 'primevue/accordiontab';
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
 
-                <p>Two-way binding requires the sync operator.</p>
-<CodeHighlight>
-&lt;Accordion&gt;
-	&lt;AccordionTab header="Header I" :active.sync="active1"&gt;
+</code></pre>
+
+				<p>Two-way binding requires v-model.</p>
+<pre v-code>
+<code>
+&lt;Accordion v-model:activeIndex="activeIndex"&gt;
+	&lt;AccordionTab header="Header I"&gt;
 		Content
 	&lt;/AccordionTab&gt;
-	&lt;AccordionTab header="Header II" :active.sync="active2"&gt;
+	&lt;AccordionTab header="Header II"&gt;
 		Content
 	&lt;/AccordionTab&gt;
-	&lt;AccordionTab header="Header III" :active.sync="active3"&gt;
+	&lt;AccordionTab header="Header III"&gt;
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Multiple</h5>
 				<p>By default only one tab at a time can be active, enabling multiple property changes this behavior to allow multiple
 					tabs be active at the same time.</p>
-<CodeHighlight>
-&lt;Accordion :multiple="true" &gt;
+<pre v-code>
+<code>
+&lt;Accordion :multiple="true"&gt;
 	&lt;AccordionTab header="Header I"&gt;
 		Content
 	&lt;/AccordionTab&gt;
@@ -70,11 +79,13 @@ import AccordionTab from 'primevue/accordiontab';
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Disabled</h5>
-				<p>A tab can be disabled by setting the disabled property to true.</p>
-<CodeHighlight>
+				<p>A tab can be disabled by setting the <i>disabled</i> property to true.</p>
+<pre v-code>
+<code>
 &lt;Accordion&gt;
 	&lt;AccordionTab header="Header I"&gt;
 		Content
@@ -86,69 +97,72 @@ import AccordionTab from 'primevue/accordiontab';
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Custom Content at Headers</h5>
 				<p>Custom content for the title section of a panel is defined using the header template.</p>
-<CodeHighlight>
+<pre v-code>
+<code>
 &lt;Accordion&gt;
 	&lt;AccordionTab&gt;
-		&lt;template slot="header"&gt;
+		&lt;template #header&gt;
 			&lt;i class="pi pi-calendar"&gt;&lt;/i&gt;
 			&lt;span&gt;Header I&lt;/span&gt;
 		&lt;/template&gt;
 		Content
 	&lt;/AccordionTab&gt;
 	&lt;AccordionTab&gt;
-		&lt;template slot="header"&gt;
+		&lt;template #header&gt;
 			&lt;i class="pi pi-calendar"&gt;&lt;/i&gt;
 			&lt;span&gt;Header II&lt;/span&gt;
 		&lt;/template&gt;
 		Content
 	&lt;/AccordionTab&gt;
 	&lt;AccordionTab&gt;
-		&lt;template slot="header"&gt;
+		&lt;template #header&gt;
 			&lt;i class="pi pi-calendar"&gt;&lt;/i&gt;
 			&lt;span&gt;Header III&lt;/span&gt;
 		&lt;/template&gt;
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Programmatic Control</h5>
-				<p>Tabs can be controlled programmatically using active property.</p>
-<CodeHighlight>
-&lt;div&gt;
-	&lt;Button :icon="active1 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 1st" @click="active1 = !active1" class="p-button-text" /&gt;
-	&lt;Button :icon="active2 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 2nd" @click="active2 = !active2" class="p-button-text" style="margin-left: .5em" /&gt;
-	&lt;Button :icon="active3 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 3rd" @click="active3 = !active3" class="p-button-text" style="margin-left: .5em" /&gt;
-&lt;/div&gt;
+				<p>Tabs can be controlled programmatically using <i>activeIndex</i> property.</p>
+<pre v-code>
+<code>
+&lt;Button @click="active = 0" class="p-button-text" label="Activate 1st" /&gt;
+&lt;Button @click="active = 1" class="p-button-text" label="Activate 2nd" /&gt;
+&lt;Button @click="active = 2" class="p-button-text" label="Activate 3rd" /&gt;
 
-&lt;Accordion :multiple="true"&gt;
-	&lt;AccordionTab header="Header I" :active="active1"&gt;
+&lt;Accordion :multiple="true" :activeIdex="active"&gt;
+	&lt;AccordionTab header="Header I"&gt;
 		Content
 	&lt;/AccordionTab&gt;
-	&lt;AccordionTab header="Header II" :active="active2"&gt;
+	&lt;AccordionTab header="Header II"&gt;
 		Content
 	&lt;/AccordionTab&gt;
-	&lt;AccordionTab header="Header III" :active="active3"&gt;
+	&lt;AccordionTab header="Header III"&gt;
 		Content
 	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
-</CodeHighlight>
 
-<CodeHighlight lang="js">
+</code></pre>
+
+<pre v-code.script>
+<code>
 export default {
 	data() {
 		return {
-			active1: true,
-			active2: false,
-			active3: false
+			active: 0
 		}
 	}
 }
-</CodeHighlight>
+
+</code></pre>
 
 				<h5>Properties of AccordionTab</h5>
 				<div class="doc-tablewrapper">
@@ -202,6 +216,12 @@ export default {
                                 <td>boolean</td>
                                 <td>false</td>
                                 <td>When enabled, multiple tabs can be activated at the same time.</td>
+                            </tr>
+							<tr>
+                                <td>activeIndex</td>
+                                <td>number|array</td>
+                                <td>null</td>
+                                <td>Index of the active tab or an array of indexes in multiple mode.</td>
                             </tr>
 						</tbody>
 					</table>
@@ -221,14 +241,14 @@ export default {
                             <tr>
                                 <td>tab-open</td>
                                 <td>event.originalEvent: Browser event  <br/>
-                                    event.tab: Opened tab
+                                    event.index: Opened tab index
                                 </td>
                                 <td>Callback to invoke when a tab gets expanded.</td>
                             </tr>
                             <tr>
                                 <td>tab-close</td>
                                 <td>event.originalEvent: Browser event  <br/>
-                                    event.tab: closed tab
+                                    event.index: Closed tab index
                                 </td>
                                 <td>Callback to invoke when an active tab is collapsed by clicking on the header.</td>
                             </tr>
@@ -271,120 +291,122 @@ export default {
 				<a href="https://github.com/primefaces/primevue/tree/master/src/views/accordion" class="btn-viewsource" target="_blank" rel="noopener noreferrer">
 					<span>View on GitHub</span>
 				</a>
-<CodeHighlight>
-<template v-pre>
+<pre v-code>
+<code><template v-pre>
 &lt;h5&gt;Default&lt;/h5&gt;
-&lt;Accordion&gt;
-    &lt;AccordionTab header="Header I" :active="true"&gt;
-        &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
-            ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
-            Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header II"&gt;
-        &lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
-            architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
-            voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header III"&gt;
-        &lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
-            cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
-            Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
+&lt;Accordion :activeIndex="0"&gt;
+	&lt;AccordionTab header="Header I"&gt;
+		&lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
+			ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+			Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header II"&gt;
+		&lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
+			architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
+			voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header III"&gt;
+		&lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
+			cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
+			Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
 
 &lt;h5&gt;Multiple&lt;/h5&gt;
-&lt;Accordion :multiple="true"&gt;
-    &lt;AccordionTab header="Header I" :active="true"&gt;
-        &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
-            ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
-            Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header II"&gt;
-        &lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
-            architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
-            voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header III"&gt;
-        &lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
-            cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
-            Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header IV" :disabled="true"&gt;
-    &lt;/AccordionTab&gt;
+&lt;Accordion :multiple="true" :activeIndex="[0]"&gt;
+	&lt;AccordionTab header="Header I"&gt;
+		&lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
+			ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+			Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header II"&gt;
+		&lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
+			architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
+			voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header III"&gt;
+		&lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
+			cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
+			Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header IV" :disabled="true"&gt;
+	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
 
 &lt;h5&gt;Programmatic&lt;/h5&gt;
-&lt;div style="padding: .5em 0 1em 0"&gt;
-    &lt;Button :icon="active1 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 1st" @click="active1 = !active1" class="p-button-text" /&gt;
-    &lt;Button :icon="active2 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 2nd" @click="active2 = !active2" class="p-button-text" style="margin-left: .5em" /&gt;
-    &lt;Button :icon="active3 ? 'pi pi-minus' : 'pi pi-plus'" label="Toggle 3rd" @click="active3 = !active3" class="p-button-text" style="margin-left: .5em" /&gt;
+&lt;div class="p-pb-3"&gt;
+	&lt;Button @click="active = 0" class="p-button-text" label="Activate 1st" /&gt;
+	&lt;Button @click="active = 1" class="p-button-text  p-mr-2" label="Activate 2nd" /&gt;
+	&lt;Button @click="active = 2" class="p-button-text  p-mr-2" label="Activate 3rd" /&gt;
 &lt;/div&gt;
 
-&lt;Accordion :multiple="true"&gt;
-    &lt;AccordionTab header="Header I" :active="active1"&gt;
-        &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
-            ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
-            Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header II" :active="active2"&gt;
-        &lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
-            architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
-            voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab header="Header III" :active="active3"&gt;
-        &lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
-            cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
-            Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
+&lt;Accordion v-model:activeIndex="active"&gt;
+	&lt;AccordionTab header="Header I"&gt;
+		&lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
+			ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+			Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header II"&gt;
+		&lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
+			architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
+			voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab header="Header III"&gt;
+		&lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
+			cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
+			Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
 
 &lt;h5&gt;Custom Headers&lt;/h5&gt;
-&lt;Accordion class="accordion-custom"&gt;
-    &lt;AccordionTab :active="true"&gt;
-        &lt;template slot="header"&gt;
-            &lt;i class="pi pi-calendar"&gt;&lt;/i&gt;
-            &lt;span&gt;Header I&lt;/span&gt;
-        &lt;/template&gt;
-        &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
-            ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
-            Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab&gt;
-        &lt;template slot="header"&gt;
-            &lt;i class="pi pi-user"&gt;&lt;/i&gt;
-            &lt;span&gt;Header II&lt;/span&gt;
-        &lt;/template&gt;
-        &lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
-            architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
-            voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
-    &lt;AccordionTab&gt;
-        &lt;template slot="header"&gt;
-            &lt;i class="pi pi-search"&gt;&lt;/i&gt;
-            &lt;span&gt;Header III&lt;/span&gt;
-            &lt;i class="pi pi-cog"&gt;&lt;/i&gt;
-        &lt;/template&gt;
-        &lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
-            cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
-            Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
-    &lt;/AccordionTab&gt;
+&lt;Accordion class="accordion-custom" :activeIndex="0"&gt;
+	&lt;AccordionTab&gt;
+		&lt;template #header&gt;
+			&lt;i class="pi pi-calendar"&gt;&lt;/i&gt;
+			&lt;span&gt;Header I&lt;/span&gt;
+		&lt;/template&gt;
+		&lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
+			ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+			Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab&gt;
+		&lt;template #header&gt;
+			&lt;i class="pi pi-user"&gt;&lt;/i&gt;
+			&lt;span&gt;Header II&lt;/span&gt;
+		&lt;/template&gt;
+		&lt;p&gt;Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi
+			architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione
+			voluptatem sequi nesciunt. Consectetur, adipisci velit, sed quia non numquam eius modi.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
+	&lt;AccordionTab&gt;
+		&lt;template #header&gt;
+			&lt;i class="pi pi-search"&gt;&lt;/i&gt;
+			&lt;span&gt;Header III&lt;/span&gt;
+			&lt;i class="pi pi-cog"&gt;&lt;/i&gt;
+		&lt;/template&gt;
+		&lt;p&gt;At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati
+			cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio.
+			Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus.&lt;/p&gt;
+	&lt;/AccordionTab&gt;
 &lt;/Accordion&gt;
 </template>
-</CodeHighlight>
 
-<CodeHighlight lang="javascript">
+</code></pre>
+
+<pre v-code.script>
+<code>
 export default {
-	data() {
-		return {
-			active1: true,
-			active2: false,
-			active3: false
-		}
-	}
+    data() {
+        return {
+            active: 0
+        }
+    }
 }
-</CodeHighlight>
 
-<CodeHighlight lang="css">
+</code></pre>
+
+<pre v-code.css>
+<code>
 .accordion-custom {
 	i, span {
 		vertical-align: middle;
@@ -394,7 +416,8 @@ export default {
 		margin: 0 .5rem;
 	}
 }
-</CodeHighlight>
+
+</code></pre>
 			</TabPanel>
 		</TabView>
 	</div>
diff --git a/src/views/tabview/TabViewDemo.vue b/src/views/tabview/TabViewDemo.vue
index e53b91563..71358cf5f 100755
--- a/src/views/tabview/TabViewDemo.vue
+++ b/src/views/tabview/TabViewDemo.vue
@@ -31,10 +31,10 @@
 
             <div class="card">
                 <h5>Programmatic</h5>
-                <div style="padding: .5rem 0 1rem 0" class="p-t-2 p-b-3">
+                <div class="p-py-2">
                     <Button @click="active = 0" class="p-button-text" label="Activate 1st" />
-                    <Button @click="active = 1" class="p-button-text" label="Activate 2nd" />
-                    <Button @click="active = 2" class="p-button-text" label="Activate 3rd" />
+                    <Button @click="active = 1" class="p-button-text p-mr-2" label="Activate 2nd" />
+                    <Button @click="active = 2" class="p-button-text p-mr-2" label="Activate 3rd" />
                 </div>
 
                 <TabView ref="tabview2" v-model:activeIndex="active">
@@ -159,10 +159,6 @@ export default {
     }
 }
 
-.p-button {
-    margin-right: .25rem;
-}
-
 .p-tabview p {
     line-height: 1.5;
     margin: 0;
diff --git a/src/views/tabview/TabViewDoc.vue b/src/views/tabview/TabViewDoc.vue
index 50c7c4ff0..0f0f2b0f1 100755
--- a/src/views/tabview/TabViewDoc.vue
+++ b/src/views/tabview/TabViewDoc.vue
@@ -167,7 +167,27 @@ export default {
 				</div>
 
                 <h5>Properties of TabView</h5>
-                <p>Any property as style and class are passed to the main container element.</p>
+                <p>Any additional properties like style and class are passed to the main container element.</p>
+                <div class="doc-tablewrapper">
+					<table class="doc-table">
+						<thead>
+                            <tr>
+                                <th>Name</th>
+                                <th>Type</th>
+                                <th>Default</th>
+                                <th>Description</th>
+                            </tr>
+						</thead>
+						<tbody>
+                            <tr>
+                                <td>activeIndex</td>
+                                <td>number</td>
+                                <td>0</td>
+                                <td>Index of the active tab.</td>
+                            </tr>
+						</tbody>
+					</table>
+				</div>
 
 				<h5>Events</h5>
 				<div class="doc-tablewrapper">
@@ -259,10 +279,10 @@ export default {
 
 &lt;div class="card"&gt;
     &lt;h5&gt;Programmatic&lt;/h5&gt;
-    &lt;div style="padding: .5rem 0 1rem 0" class="p-t-2 p-b-3"&gt;
+    &lt;div class="p-py-2"&gt;
         &lt;Button @click="active = 0" class="p-button-text" label="Activate 1st" /&gt;
-        &lt;Button @click="active = 1" class="p-button-text" label="Activate 2nd" /&gt;
-        &lt;Button @click="active = 2" class="p-button-text" label="Activate 3rd" /&gt;
+        &lt;Button @click="active = 1" class="p-button-text p-mr-2" label="Activate 2nd" /&gt;
+        &lt;Button @click="active = 2" class="p-button-text p-mr-2" label="Activate 3rd" /&gt;
     &lt;/div&gt;
 
     &lt;TabView ref="tabview2" v-model:activeIndex="active"&gt;