v3.11.0

changelog.md

@@ -1,5 +1,47 @@
 # Changelog
 
+## 2025-12-30 - 3.11.0 - feat(dees-appui-tabs)
+improve horizontal tabs UX with scroll fades, hover scrollbar, and smooth scroll-to-selected
+
+- Add reactive scroll state (canScrollLeft / canScrollRight) and updateScrollState to track horizontal overflow.
+- Introduce scroll-fade gradient elements and CSS to indicate overflow on left/right edges.
+- Show a thin, styled scrollbar on hover (webkit + Firefox styling) instead of hiding it completely.
+- Auto-scroll selected tab into view using scrollTabIntoView and smooth scroll when selecting a tab.
+- Set up a ResizeObserver to recompute scroll state on container size changes and clean it up on disconnect.
+- Ensure lifecycle hooks call updateScrollState (firstUpdated/updated) so indicators stay in sync after render/fonts ready.
+
+## 2025-12-29 - 3.10.0 - feat(appui-tabs)
+add closeable tabs and auto-hide behavior for content tabs, plus API and events to control them
+
+- Add closeable tab support: IMenuItem.closeable & IMenuItem.onClose; dees-appui-tabs renders a close button, invokes onClose, and emits a 'tab-close' event.
+- Add auto-hide feature: dees-appui-tabs (autoHide, autoHideThreshold) and corresponding properties in dees-appui-maincontent/dees-appui-base to hide tabs when count ≤ threshold.
+- Expose new API: dees-appui-base.setContentTabsAutoHide(enabled, threshold) and update appconfig interface to include setContentTabsAutoHide.
+- Re-emit 'tab-close' events from dees-appui-maincontent and dees-appui-base so parent components can react to tab closures.
+- Add interactive demos (demo-closeable-tabs, demo-autohide-tabs) demonstrating the new closeable and auto-hide behaviors and controls.
+
+## 2025-12-29 - 3.9.0 - feat(dees-appui-mainmenu)
+add status badges to main menu items with theme-aware styling
+
+- Introduce .badge element and layout (min-width, height, padding, font-size, weight, border-radius) to display counts/status on menu items.
+- Add four badge variants: default, success, warning, error, using cssManager.bdTheme for light/dark color pairs.
+- Render the badge element conditionally in the menu item template when tabArg.badge is provided; hide badges when host has [collapsed] attribute.
+
+## 2025-12-29 - 3.8.0 - feat(dees-appui-base)
+add interactive demo controls to manipulate appui via view activation context
+
+- Store IViewActivationContext on the demo element (this.ctx) during onActivate
+- Add a new "Context Actions" UI section with buttons that call ctx.appui methods (toggle main/secondary menus, content tabs, collapse/expand main menu, set breadcrumbs, navigate to views, add activity entry, set/clear menu badges)
+- Include styles for ctx-actions and button variants (success, danger, hover states)
+- Change is limited to the demo file (dees-appui-base.demo.ts) and is non-breaking
+
+## 2025-12-29 - 3.7.1 - fix(dees-appui-maincontent)
+migrate main content layout to CSS Grid and enable topbar collapse transitions
+
+- Replace absolute positioning with CSS Grid on :host and .maincontainer to enable natural document flow
+- Make .topbar a grid and animate collapse via grid-template-rows; switch :host([notabs]) to grid-template-rows: 0fr instead of display:none to allow transitions
+- Set .maincontainer to display:contents and add min-height:0 on content areas and topbar children to fix overflow/scrolling and flex/grid height issues
+- Remove positional styles (position:absolute/top/left/right/bottom) so content scrolls correctly and layout is more robust
+
 ## 2025-12-29 - 3.7.0 - feat(dees-contextmenu,dees-appui-tabs,test)
 Prevent double-destruction of context menus, await window layer teardown, update destroyAll behavior, remove tabs content slot, and adjust tests
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@design.estate/dees-catalog",
-  "version": "3.7.0",
+  "version": "3.11.0",
   "private": false,
   "description": "A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.",
   "main": "dist_ts_web/index.js",

ts_web/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-catalog',
-  version: '3.7.0',
+  version: '3.11.0',
   description: 'A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.'
 }

ts_web/elements/00group-appui/dees-appui-base/dees-appui-base.demo.ts

@@ -9,7 +9,10 @@ class DemoDashboardView extends DeesElement {
   @state()
   accessor activated: boolean = false;
 
+  private ctx: IViewActivationContext;
+
   onActivate(context: IViewActivationContext) {
+    this.ctx = context;
     this.activated = true;
     console.log('Dashboard activated with context:', context);
 
@@ -75,6 +78,52 @@ class DemoDashboardView extends DeesElement {
         .metric { font-size: 32px; font-weight: 700; color: #fafafa; }
         .status { display: inline-block; padding: 2px 8px; border-radius: 9px; font-size: 12px; }
         .status.active { background: #14532d; color: #4ade80; }
+
+        .ctx-actions {
+          margin-top: 32px;
+          padding: 24px;
+          background: rgba(255,255,255,0.02);
+          border: 1px solid rgba(255,255,255,0.08);
+          border-radius: 8px;
+        }
+        .ctx-actions h2 { color: #fafafa; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
+        .button-grid {
+          display: flex;
+          flex-wrap: wrap;
+          gap: 8px;
+        }
+        .ctx-btn {
+          background: rgba(59, 130, 246, 0.1);
+          border: 1px solid rgba(59, 130, 246, 0.3);
+          color: #60a5fa;
+          padding: 8px 16px;
+          border-radius: 6px;
+          cursor: pointer;
+          font-size: 13px;
+          transition: all 0.15s ease;
+        }
+        .ctx-btn:hover {
+          background: rgba(59, 130, 246, 0.2);
+          border-color: rgba(59, 130, 246, 0.5);
+        }
+        .ctx-btn.danger {
+          background: rgba(239, 68, 68, 0.1);
+          border-color: rgba(239, 68, 68, 0.3);
+          color: #f87171;
+        }
+        .ctx-btn.danger:hover {
+          background: rgba(239, 68, 68, 0.2);
+          border-color: rgba(239, 68, 68, 0.5);
+        }
+        .ctx-btn.success {
+          background: rgba(34, 197, 94, 0.1);
+          border-color: rgba(34, 197, 94, 0.3);
+          color: #4ade80;
+        }
+        .ctx-btn.success:hover {
+          background: rgba(34, 197, 94, 0.2);
+          border-color: rgba(34, 197, 94, 0.5);
+        }
       </style>
       <h1>Dashboard</h1>
       <p>Welcome back! Here's an overview of your system.</p>
@@ -95,8 +144,48 @@ class DemoDashboardView extends DeesElement {
           <p style="color: #737373; font-size: 12px; margin: 0;">All systems operational</p>
         </div>
       </div>
+
+      <div class="ctx-actions">
+        <h2>Context Actions (ctx.appui)</h2>
+        <div class="button-grid">
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setMainMenuVisible(false)}>Hide Main Menu</button>
+          <button class="ctx-btn success" @click=${() => this.ctx?.appui.setMainMenuVisible(true)}>Show Main Menu</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setSecondaryMenuVisible(false)}>Hide Secondary Menu</button>
+          <button class="ctx-btn success" @click=${() => this.ctx?.appui.setSecondaryMenuVisible(true)}>Show Secondary Menu</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setContentTabsVisible(false)}>Hide Content Tabs</button>
+          <button class="ctx-btn success" @click=${() => this.ctx?.appui.setContentTabsVisible(true)}>Show Content Tabs</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setMainMenuCollapsed(true)}>Collapse Main Menu</button>
+          <button class="ctx-btn success" @click=${() => this.ctx?.appui.setMainMenuCollapsed(false)}>Expand Main Menu</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setBreadcrumbs(['Dashboard', 'Overview', 'Stats'])}>Set Breadcrumbs</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.navigateToView('projects')}>Go to Projects</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.navigateToView('settings', { section: 'security' })}>Go to Settings/Security</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.activityLog.add({ type: 'custom', user: 'Demo User', message: 'Button clicked from ctx!', iconName: 'lucide:mouse-pointer-click' })}>Add Activity Entry</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setMainMenuBadge('tasks', 99)}>Set Tasks Badge to 99</button>
+          <button class="ctx-btn danger" @click=${() => this.ctx?.appui.clearMainMenuBadge('tasks')}>Clear Tasks Badge</button>
+          <button class="ctx-btn" @click=${() => this.ctx?.appui.setContentTabsAutoHide(true, 1)}>Auto-hide Tabs (≤1)</button>
+          <button class="ctx-btn danger" @click=${() => this.ctx?.appui.setContentTabsAutoHide(false)}>Disable Auto-hide</button>
+          <button class="ctx-btn success" @click=${() => this.addCloseableTab()}>Add Closeable Tab</button>
+        </div>
+      </div>
     `;
   }
+
+  private tabCounter = 0;
+
+  private addCloseableTab() {
+    if (!this.ctx) return;
+    this.tabCounter++;
+    const tabKey = `Tab ${this.tabCounter}`;
+    this.ctx.appui.addContentTab({
+      key: tabKey,
+      iconName: 'lucide:file',
+      action: () => console.log(`Selected ${tabKey}`),
+      closeable: true,
+      onClose: () => {
+        this.ctx?.appui.removeContentTab(tabKey);
+      }
+    });
+  }
 }
 
 // Settings view with route params and canDeactivate guard

ts_web/elements/00group-appui/dees-appui-base/dees-appui-base.ts

@@ -120,6 +120,12 @@ export class DeesAppuiBase extends DeesElement {
   @property({ type: Boolean })
   accessor maincontentTabsVisible: boolean = true;
 
+  @property({ type: Boolean })
+  accessor contentTabsAutoHide: boolean = false;
+
+  @property({ type: Number })
+  accessor contentTabsAutoHideThreshold: number = 0;
+
   // Properties for maincontent
   @property({ type: Array })
   accessor maincontentTabs: interfaces.IMenuItem[] = [];
@@ -250,7 +256,10 @@ export class DeesAppuiBase extends DeesElement {
           .tabs=${this.maincontentTabs}
           .selectedTab=${this.maincontentSelectedTab}
           .showTabs=${this.maincontentTabsVisible}
+          .tabsAutoHide=${this.contentTabsAutoHide}
+          .tabsAutoHideThreshold=${this.contentTabsAutoHideThreshold}
           @tab-select=${(e: CustomEvent) => this.handleContentTabSelect(e)}
+          @tab-close=${(e: CustomEvent) => this.handleContentTabClose(e)}
         >
           <div class="view-container"></div>
           <slot name="maincontent"></slot>
@@ -468,6 +477,16 @@ export class DeesAppuiBase extends DeesElement {
     this.maincontentTabsVisible = visible;
   }
 
+  /**
+   * Set content tabs auto-hide behavior
+   * @param enabled - Enable auto-hide feature
+   * @param threshold - Hide when tabs.length <= threshold (default 0 = hide when no tabs)
+   */
+  public setContentTabsAutoHide(enabled: boolean, threshold: number = 0): void {
+    this.contentTabsAutoHide = enabled;
+    this.contentTabsAutoHideThreshold = threshold;
+  }
+
   /**
    * Set a badge on a main menu item
    */
@@ -1020,4 +1039,12 @@ export class DeesAppuiBase extends DeesElement {
       composed: true
     }));
   }
+
+  private handleContentTabClose(e: CustomEvent) {
+    this.dispatchEvent(new CustomEvent('content-tab-close', {
+      detail: e.detail,
+      bubbles: true,
+      composed: true
+    }));
+  }
 }

ts_web/elements/00group-appui/dees-appui-maincontent/dees-appui-maincontent.ts

@@ -46,6 +46,12 @@ export class DeesAppuiMaincontent extends DeesElement {
   @property({ type: Boolean })
   accessor showTabs: boolean = true;
 
+  @property({ type: Boolean })
+  accessor tabsAutoHide: boolean = false;
+
+  @property({ type: Number })
+  accessor tabsAutoHideThreshold: number = 0;
+
   public static styles = [
     themeDefaultStyles,
     cssManager.defaultStyles,
@@ -53,41 +59,36 @@ export class DeesAppuiMaincontent extends DeesElement {
       /* TODO: Migrate hardcoded values to --dees-* CSS variables */
       :host {
         color: ${cssManager.bdTheme('#333', '#fff')};
-        display: block;
+        display: grid;
+        grid-template-rows: auto 1fr;
         width: 100%;
         height: 100%;
-        position: relative;
         background: ${cssManager.bdTheme('#ffffff', '#161616')};
       }
+
       .maincontainer {
-        position: absolute;
+        display: contents;
-        height: 100%;
-        right: 0px;
-        top: 0px;
-        width: 100%;
       }
 
       .topbar {
-        position: absolute;
+        display: grid;
-        width: 100%;
+        grid-template-rows: 1fr;
+        overflow: hidden;
         user-select: none;
+        transition: grid-template-rows 0.3s ease;
+      }
+
+      .topbar > * {
+        min-height: 0;
       }
 
       .content-area {
-        position: absolute;
-        top: 60px;
-        left: 0;
-        right: 0;
-        bottom: 0;
         overflow: auto;
+        min-height: 0;
       }
 
       :host([notabs]) .topbar {
-        display: none;
+        grid-template-rows: 0fr;
-      }
-
-      :host([notabs]) .content-area {
-        top: 0;
       }
     `,
   ];
@@ -101,7 +102,10 @@ export class DeesAppuiMaincontent extends DeesElement {
             .selectedTab=${this.selectedTab}
             .showTabIndicator=${true}
             .tabStyle=${'horizontal'}
+            .autoHide=${this.tabsAutoHide}
+            .autoHideThreshold=${this.tabsAutoHideThreshold}
             @tab-select=${(e: CustomEvent) => this.handleTabSelect(e)}
+            @tab-close=${(e: CustomEvent) => this.handleTabClose(e)}
           ></dees-appui-tabs>
         </div>
         <div class="content-area">
@@ -114,7 +118,7 @@ export class DeesAppuiMaincontent extends DeesElement {
 
   private handleTabSelect(e: CustomEvent) {
     this.selectedTab = e.detail.tab;
-    
+
     // Re-emit the event
     this.dispatchEvent(new CustomEvent('tab-select', {
       detail: e.detail,
@@ -123,6 +127,15 @@ export class DeesAppuiMaincontent extends DeesElement {
     }));
   }
 
+  private handleTabClose(e: CustomEvent) {
+    // Re-emit the event
+    this.dispatchEvent(new CustomEvent('tab-close', {
+      detail: e.detail,
+      bubbles: true,
+      composed: true
+    }));
+  }
+
   updated(changedProperties: Map<string | number | symbol, unknown>) {
     super.updated(changedProperties);
     if (changedProperties.has('showTabs')) {

ts_web/elements/00group-appui/dees-appui-mainmenu/dees-appui-mainmenu.ts

@@ -336,6 +336,44 @@ export class DeesAppuiMainmenu extends DeesElement {
         transition-delay: 1s;
       }
 
+      /* Badge styles */
+      .badge {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        min-width: 18px;
+        height: 18px;
+        padding: 0 6px;
+        font-size: 11px;
+        font-weight: 600;
+        border-radius: 9px;
+        margin-left: auto;
+      }
+
+      .badge.default {
+        background: ${cssManager.bdTheme('#f4f4f5', '#27272a')};
+        color: ${cssManager.bdTheme('#3f3f46', '#a1a1aa')};
+      }
+
+      .badge.success {
+        background: ${cssManager.bdTheme('#dcfce7', '#14532d')};
+        color: ${cssManager.bdTheme('#166534', '#4ade80')};
+      }
+
+      .badge.warning {
+        background: ${cssManager.bdTheme('#fef3c7', '#451a03')};
+        color: ${cssManager.bdTheme('#92400e', '#fbbf24')};
+      }
+
+      .badge.error {
+        background: ${cssManager.bdTheme('#fee2e2', '#450a0a')};
+        color: ${cssManager.bdTheme('#991b1b', '#f87171')};
+      }
+
+      :host([collapsed]) .badge {
+        display: none;
+      }
+
       /* Bottom Section */
       .bottomSection {
         flex-shrink: 0;
@@ -420,6 +458,9 @@ export class DeesAppuiMainmenu extends DeesElement {
       >
         <dees-icon .icon="${tabArg.iconName || ''}"></dees-icon>
         <span class="tabLabel">${tabArg.key}</span>
+        ${tabArg.badge !== undefined ? html`
+          <span class="badge ${tabArg.badgeVariant || 'default'}">${tabArg.badge}</span>
+        ` : ''}
         <span class="tab-tooltip">${tabArg.key}</span>
       </div>
     `;

ts_web/elements/00group-appui/dees-appui-tabs/dees-appui-tabs.demo.ts

@@ -1,5 +1,212 @@
-import { html, cssManager } from '@design.estate/dees-element';
+import { html, cssManager, css, DeesElement, customElement, state } from '@design.estate/dees-element';
 import * as interfaces from '../../interfaces/index.js';
+import type { DeesAppuiTabs } from './dees-appui-tabs.js';
+
+// Interactive demo component for closeable tabs
+@customElement('demo-closeable-tabs')
+class DemoCloseableTabs extends DeesElement {
+  @state()
+  accessor tabs: interfaces.IMenuItem[] = [
+    { key: 'Main', iconName: 'lucide:home', action: () => console.log('Main clicked') },
+  ];
+
+  @state()
+  accessor tabCounter: number = 0;
+
+  static styles = [
+    css`
+      :host {
+        display: block;
+      }
+      .controls {
+        display: flex;
+        gap: 8px;
+        margin-top: 16px;
+      }
+      button {
+        background: ${cssManager.bdTheme('rgba(59, 130, 246, 0.1)', 'rgba(59, 130, 246, 0.1)')};
+        border: 1px solid ${cssManager.bdTheme('rgba(59, 130, 246, 0.3)', 'rgba(59, 130, 246, 0.3)')};
+        color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
+        padding: 8px 16px;
+        border-radius: 6px;
+        cursor: pointer;
+        font-size: 13px;
+        transition: all 0.15s ease;
+      }
+      button:hover {
+        background: ${cssManager.bdTheme('rgba(59, 130, 246, 0.2)', 'rgba(59, 130, 246, 0.2)')};
+      }
+      .info {
+        margin-top: 16px;
+        padding: 12px 16px;
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.02)', 'rgba(255,255,255,0.02)')};
+        border-radius: 6px;
+        font-size: 13px;
+        color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};
+      }
+    `
+  ];
+
+  private addTab() {
+    this.tabCounter++;
+    const tabKey = `Document ${this.tabCounter}`;
+    this.tabs = [
+      ...this.tabs,
+      {
+        key: tabKey,
+        iconName: 'lucide:file',
+        action: () => console.log(`${tabKey} clicked`),
+        closeable: true,
+        onClose: () => this.removeTab(tabKey)
+      }
+    ];
+  }
+
+  private removeTab(tabKey: string) {
+    this.tabs = this.tabs.filter(t => t.key !== tabKey);
+  }
+
+  render() {
+    return html`
+      <dees-appui-tabs
+        .tabs=${this.tabs}
+        @tab-close=${(e: CustomEvent) => this.removeTab(e.detail.tab.key)}
+      ></dees-appui-tabs>
+      <div class="controls">
+        <button @click=${() => this.addTab()}>+ Add New Tab</button>
+      </div>
+      <div class="info">
+        Click the X button on tabs to close them. The "Main" tab is not closeable.
+        <br>Current tabs: ${this.tabs.length}
+      </div>
+    `;
+  }
+}
+
+// Interactive demo for auto-hide feature
+@customElement('demo-autohide-tabs')
+class DemoAutoHideTabs extends DeesElement {
+  @state()
+  accessor tabs: interfaces.IMenuItem[] = [
+    { key: 'Tab 1', iconName: 'lucide:file', action: () => console.log('Tab 1') },
+    { key: 'Tab 2', iconName: 'lucide:file', action: () => console.log('Tab 2') },
+  ];
+
+  @state()
+  accessor autoHide: boolean = true;
+
+  @state()
+  accessor threshold: number = 1;
+
+  static styles = [
+    css`
+      :host {
+        display: block;
+      }
+      .tabs-container {
+        min-height: 60px;
+        border: 1px dashed ${cssManager.bdTheme('#e5e7eb', '#27272a')};
+        border-radius: 6px;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+      }
+      .tabs-container dees-appui-tabs {
+        width: 100%;
+      }
+      .placeholder {
+        color: ${cssManager.bdTheme('#a1a1aa', '#71717a')};
+        font-size: 13px;
+        font-style: italic;
+      }
+      .controls {
+        display: flex;
+        gap: 8px;
+        margin-top: 16px;
+        flex-wrap: wrap;
+      }
+      button {
+        background: ${cssManager.bdTheme('rgba(59, 130, 246, 0.1)', 'rgba(59, 130, 246, 0.1)')};
+        border: 1px solid ${cssManager.bdTheme('rgba(59, 130, 246, 0.3)', 'rgba(59, 130, 246, 0.3)')};
+        color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
+        padding: 8px 16px;
+        border-radius: 6px;
+        cursor: pointer;
+        font-size: 13px;
+        transition: all 0.15s ease;
+      }
+      button:hover {
+        background: ${cssManager.bdTheme('rgba(59, 130, 246, 0.2)', 'rgba(59, 130, 246, 0.2)')};
+      }
+      button.danger {
+        background: ${cssManager.bdTheme('rgba(239, 68, 68, 0.1)', 'rgba(239, 68, 68, 0.1)')};
+        border-color: ${cssManager.bdTheme('rgba(239, 68, 68, 0.3)', 'rgba(239, 68, 68, 0.3)')};
+        color: ${cssManager.bdTheme('#ef4444', '#f87171')};
+      }
+      button.danger:hover {
+        background: ${cssManager.bdTheme('rgba(239, 68, 68, 0.2)', 'rgba(239, 68, 68, 0.2)')};
+      }
+      .info {
+        margin-top: 16px;
+        padding: 12px 16px;
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.02)', 'rgba(255,255,255,0.02)')};
+        border-radius: 6px;
+        font-size: 13px;
+        color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};
+      }
+    `
+  ];
+
+  private tabCounter = 2;
+
+  private addTab() {
+    this.tabCounter++;
+    this.tabs = [...this.tabs, {
+      key: `Tab ${this.tabCounter}`,
+      iconName: 'lucide:file',
+      action: () => console.log(`Tab ${this.tabCounter}`)
+    }];
+  }
+
+  private removeLastTab() {
+    if (this.tabs.length > 0) {
+      this.tabs = this.tabs.slice(0, -1);
+    }
+  }
+
+  private clearTabs() {
+    this.tabs = [];
+  }
+
+  render() {
+    const shouldHide = this.autoHide && this.tabs.length <= this.threshold;
+
+    return html`
+      <div class="tabs-container">
+        ${shouldHide
+          ? html`<span class="placeholder">Tabs hidden (${this.tabs.length} tabs ≤ threshold ${this.threshold})</span>`
+          : html`<dees-appui-tabs
+              .tabs=${this.tabs}
+              .autoHide=${this.autoHide}
+              .autoHideThreshold=${this.threshold}
+            ></dees-appui-tabs>`
+        }
+      </div>
+      <div class="controls">
+        <button @click=${() => this.addTab()}>+ Add Tab</button>
+        <button class="danger" @click=${() => this.removeLastTab()}>- Remove Tab</button>
+        <button class="danger" @click=${() => this.clearTabs()}>Clear All</button>
+        <button @click=${() => { this.threshold = 0; }}>Threshold: 0</button>
+        <button @click=${() => { this.threshold = 1; }}>Threshold: 1</button>
+        <button @click=${() => { this.threshold = 2; }}>Threshold: 2</button>
+      </div>
+      <div class="info">
+        Auto-hide: ${this.autoHide ? 'ON' : 'OFF'} | Threshold: ${this.threshold} | Tabs: ${this.tabs.length}
+        <br>Tabs will hide when count ≤ threshold.
+      </div>
+    `;
+  }
+}
 
 export const demoFunc = () => {
   const horizontalTabs: interfaces.IMenuItem[] = [
@@ -71,6 +278,16 @@ export const demoFunc = () => {
         ${demoContent('Select a tab to see the smooth sliding animation of the indicator. The indicator automatically adjusts its width to match the tab content with minimal padding.')}
       </div>
 
+      <div class="section">
+        <div class="section-title">Closeable Tabs (Browser-style)</div>
+        <demo-closeable-tabs></demo-closeable-tabs>
+      </div>
+
+      <div class="section">
+        <div class="section-title">Auto-hide Tabs</div>
+        <demo-autohide-tabs></demo-autohide-tabs>
+      </div>
+
       <div class="section">
         <div class="section-title">Vertical Tabs Layout</div>
         <div class="two-column">

ts_web/elements/00group-appui/dees-appui-tabs/dees-appui-tabs.ts

@@ -4,6 +4,7 @@ import {
   DeesElement,
   type TemplateResult,
   property,
+  state,
   customElement,
   html,
   css,
@@ -33,6 +34,21 @@ export class DeesAppuiTabs extends DeesElement {
   @property({ type: String })
   accessor tabStyle: 'horizontal' | 'vertical' = 'horizontal';
 
+  @property({ type: Boolean })
+  accessor autoHide: boolean = false;
+
+  @property({ type: Number })
+  accessor autoHideThreshold: number = 0;
+
+  // Scroll state for fade indicators
+  @state()
+  private accessor canScrollLeft: boolean = false;
+
+  @state()
+  private accessor canScrollRight: boolean = false;
+
+  private resizeObserver: ResizeObserver | null = null;
+
   public static styles = [
     themeDefaultStyles,
     cssManager.defaultStyles,
@@ -42,21 +58,56 @@ export class DeesAppuiTabs extends DeesElement {
         display: block;
         position: relative;
         width: 100%;
+        min-width: 0;
+        overflow: hidden;
       }
 
       .tabs-wrapper {
         position: relative;
+        min-width: 0;
       }
 
       .tabs-wrapper.horizontal-wrapper {
         height: 48px;
         border-bottom: 1px solid ${cssManager.bdTheme('#e5e7eb', '#27272a')};
         box-sizing: border-box;
+        overflow: hidden;
+      }
+
+      /* Scroll fade indicators */
+      .scroll-fade {
+        position: absolute;
+        top: 0;
+        bottom: 1px;
+        width: 48px;
+        pointer-events: none;
+        opacity: 0;
+        transition: opacity 0.2s ease;
+        z-index: 10;
+      }
+
+      .scroll-fade-left {
+        left: 0;
+        background: linear-gradient(to right,
+          ${cssManager.bdTheme('#ffffff', '#161616')} 0%,
+          ${cssManager.bdTheme('rgba(255,255,255,0)', 'rgba(22,22,22,0)')} 100%);
+      }
+
+      .scroll-fade-right {
+        right: 0;
+        background: linear-gradient(to left,
+          ${cssManager.bdTheme('#ffffff', '#161616')} 0%,
+          ${cssManager.bdTheme('rgba(255,255,255,0)', 'rgba(22,22,22,0)')} 100%);
+      }
+
+      .scroll-fade.visible {
+        opacity: 1;
       }
 
       .tabsContainer {
         position: relative;
         user-select: none;
+        min-width: 0;
       }
 
       .tabsContainer.horizontal {
@@ -64,14 +115,39 @@ export class DeesAppuiTabs extends DeesElement {
         align-items: center;
         font-size: 14px;
         overflow-x: auto;
-        scrollbar-width: none;
+        overflow-y: hidden;
+        scrollbar-width: thin;
+        scrollbar-color: transparent transparent;
         height: 100%;
         padding: 0 16px;
         gap: 4px;
       }
 
+      /* Show scrollbar on hover */
+      .tabs-wrapper:hover .tabsContainer.horizontal {
+        scrollbar-color: ${cssManager.bdTheme('rgba(0,0,0,0.2)', 'rgba(255,255,255,0.2)')} transparent;
+      }
+
       .tabsContainer.horizontal::-webkit-scrollbar {
-        display: none;
+        height: 4px;
+      }
+
+      .tabsContainer.horizontal::-webkit-scrollbar-track {
+        background: transparent;
+      }
+
+      .tabsContainer.horizontal::-webkit-scrollbar-thumb {
+        background: transparent;
+        border-radius: 2px;
+        transition: background 0.2s ease;
+      }
+
+      .tabs-wrapper:hover .tabsContainer.horizontal::-webkit-scrollbar-thumb {
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.2)', 'rgba(255,255,255,0.2)')};
+      }
+
+      .tabs-wrapper:hover .tabsContainer.horizontal::-webkit-scrollbar-thumb:hover {
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.35)', 'rgba(255,255,255,0.35)')};
       }
 
       .tabsContainer.vertical {
@@ -198,10 +274,50 @@ export class DeesAppuiTabs extends DeesElement {
         z-index: 1;
         box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
       }
+
+      /* Close button */
+      .tab-close {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: 16px;
+        height: 16px;
+        border-radius: 4px;
+        margin-left: 8px;
+        opacity: 0.4;
+        transition: opacity 0.15s, background 0.15s;
+        color: ${cssManager.bdTheme('#71717a', '#71717a')};
+      }
+
+      .tab:hover .tab-close {
+        opacity: 0.7;
+      }
+
+      .tab-close:hover {
+        opacity: 1;
+        background: ${cssManager.bdTheme('rgba(0,0,0,0.1)', 'rgba(255,255,255,0.1)')};
+        color: ${cssManager.bdTheme('#ef4444', '#f87171')};
+      }
+
+      .tab.selectedTab .tab-close {
+        opacity: 0.5;
+      }
+
+      .tab.selectedTab:hover .tab-close {
+        opacity: 0.8;
+      }
+
+      .tab.selectedTab .tab-close:hover {
+        opacity: 1;
+      }
     `,
   ];
 
   public render(): TemplateResult {
+    // Auto-hide when enabled and tab count is at or below threshold
+    if (this.autoHide && this.tabs.length <= this.autoHideThreshold) {
+      return html``;
+    }
     return html`
       ${this.renderTabsWrapper()}
     `;
@@ -212,6 +328,19 @@ export class DeesAppuiTabs extends DeesElement {
     const wrapperClass = isHorizontal ? 'tabs-wrapper horizontal-wrapper' : 'vertical-wrapper';
     const containerClass = `tabsContainer ${this.tabStyle}`;
 
+    if (isHorizontal) {
+      return html`
+        <div class="${wrapperClass}">
+          <div class="scroll-fade scroll-fade-left ${this.canScrollLeft ? 'visible' : ''}"></div>
+          <div class="${containerClass}" @scroll=${this.handleScroll}>
+            ${this.tabs.map(tab => this.renderTab(tab, isHorizontal))}
+          </div>
+          <div class="scroll-fade scroll-fade-right ${this.canScrollRight ? 'visible' : ''}"></div>
+          ${this.showTabIndicator ? html`<div class="tabIndicator"></div>` : ''}
+        </div>
+      `;
+    }
+
     return html`
       <div class="${wrapperClass}">
         <div class="${containerClass}">
@@ -225,15 +354,23 @@ export class DeesAppuiTabs extends DeesElement {
   private renderTab(tab: interfaces.IMenuItem, isHorizontal: boolean): TemplateResult {
     const isSelected = tab === this.selectedTab;
     const classes = `tab ${isSelected ? 'selectedTab' : ''}`;
-    
+
+    const closeButton = tab.closeable ? html`
+      <span class="tab-close" @click="${(e: Event) => this.closeTab(e, tab)}">
+        <dees-icon .icon=${'lucide:x'} style="font-size: 12px;"></dees-icon>
+      </span>
+    ` : '';
+
     const content = isHorizontal ? html`
       <span class="tab-content">
         ${this.renderTabIcon(tab)}
         ${tab.key}
       </span>
+      ${closeButton}
     ` : html`
       ${this.renderTabIcon(tab)}
       ${tab.key}
+      ${closeButton}
     `;
 
     return html`
@@ -253,7 +390,12 @@ export class DeesAppuiTabs extends DeesElement {
   private selectTab(tabArg: interfaces.IMenuItem) {
     this.selectedTab = tabArg;
     tabArg.action();
-    
+
+    // Scroll selected tab into view
+    requestAnimationFrame(() => {
+      this.scrollTabIntoView(tabArg);
+    });
+
     // Emit tab-select event
     this.dispatchEvent(new CustomEvent('tab-select', {
       detail: { tab: tabArg },
@@ -262,19 +404,107 @@ export class DeesAppuiTabs extends DeesElement {
     }));
   }
 
+  private closeTab(e: Event, tab: interfaces.IMenuItem) {
+    e.stopPropagation();  // Don't select tab when closing
+
+    // Call the tab's onClose callback if defined
+    if (tab.onClose) {
+      tab.onClose();
+    }
+
+    // Also emit event for parent components
+    this.dispatchEvent(new CustomEvent('tab-close', {
+      detail: { tab },
+      bubbles: true,
+      composed: true
+    }));
+  }
+
   firstUpdated() {
     if (this.tabs && this.tabs.length > 0) {
       this.selectTab(this.tabs[0]);
     }
+
+    // Set up ResizeObserver for scroll state updates
+    this.setupResizeObserver();
+
+    // Initial scroll state check
+    requestAnimationFrame(() => {
+      this.updateScrollState();
+    });
+  }
+
+  async disconnectedCallback() {
+    await super.disconnectedCallback();
+    if (this.resizeObserver) {
+      this.resizeObserver.disconnect();
+      this.resizeObserver = null;
+    }
+  }
+
+  private setupResizeObserver() {
+    if (this.tabStyle !== 'horizontal') return;
+
+    this.resizeObserver = new ResizeObserver(() => {
+      this.updateScrollState();
+    });
+
+    const container = this.shadowRoot?.querySelector('.tabsContainer.horizontal');
+    if (container) {
+      this.resizeObserver.observe(container);
+    }
+  }
+
+  private handleScroll = () => {
+    this.updateScrollState();
+  };
+
+  private updateScrollState() {
+    const container = this.shadowRoot?.querySelector('.tabsContainer.horizontal') as HTMLElement;
+    if (!container) return;
+
+    const scrollLeft = container.scrollLeft;
+    const scrollWidth = container.scrollWidth;
+    const clientWidth = container.clientWidth;
+
+    // Small threshold to account for rounding
+    const threshold = 2;
+
+    this.canScrollLeft = scrollLeft > threshold;
+    this.canScrollRight = scrollLeft < scrollWidth - clientWidth - threshold;
+  }
+
+  private scrollTabIntoView(tab: interfaces.IMenuItem) {
+    if (this.tabStyle !== 'horizontal') return;
+
+    const tabIndex = this.tabs.indexOf(tab);
+    if (tabIndex === -1) return;
+
+    const container = this.shadowRoot?.querySelector('.tabsContainer.horizontal') as HTMLElement;
+    const tabElement = container?.querySelector(`.tab:nth-child(${tabIndex + 1})`) as HTMLElement;
+
+    if (tabElement && container) {
+      const containerRect = container.getBoundingClientRect();
+      const tabRect = tabElement.getBoundingClientRect();
+
+      // Check if tab is fully visible
+      const isFullyVisible =
+        tabRect.left >= containerRect.left &&
+        tabRect.right <= containerRect.right;
+
+      if (!isFullyVisible) {
+        tabElement.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'nearest' });
+      }
+    }
   }
 
   async updated(changedProperties: Map<string, any>) {
     super.updated(changedProperties);
-    
+
     if (changedProperties.has('tabs') && this.tabs && this.tabs.length > 0 && !this.selectedTab) {
       this.selectTab(this.tabs[0]);
     }
-    
+
     if (changedProperties.has('selectedTab') || changedProperties.has('tabs')) {
       await this.updateComplete;
       // Wait for fonts to load on first update
@@ -283,6 +513,7 @@ export class DeesAppuiTabs extends DeesElement {
       }
       requestAnimationFrame(() => {
         this.updateTabIndicator();
+        this.updateScrollState();
       });
     }
   }

ts_web/elements/interfaces/appconfig.ts

@@ -22,6 +22,7 @@ export type TDeesAppuiBase = HTMLElement & {
   setSecondaryMenuCollapsed: (collapsed: boolean) => void;
   setSecondaryMenuVisible: (visible: boolean) => void;
   setContentTabsVisible: (visible: boolean) => void;
+  setContentTabsAutoHide: (enabled: boolean, threshold?: number) => void;
   setMainMenuBadge: (tabKey: string, badge: string | number) => void;
   clearMainMenuBadge: (tabKey: string) => void;
   setSecondaryMenu: (config: { heading?: string; groups: IMenuGroup[] }) => void;

ts_web/elements/interfaces/tab.ts

@@ -4,4 +4,6 @@ export interface IMenuItem {
   action: () => void;
   badge?: string | number;
   badgeVariant?: 'default' | 'success' | 'warning' | 'error';
+  closeable?: boolean;
+  onClose?: () => void;
 }