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# UI Components
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Comprehensive collection of Material Design components for building modern user interfaces with Vue.js.
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## Capabilities
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### Core UI Components
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Essential user interface components for basic application needs.
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```typescript { .api }
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/** Application root component providing Material Design styling context */
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const VApp: Component;
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/** Material Design button component with multiple variants and states */
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const VBtn: Component;
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/** Material Design card container for content grouping */
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const VCard: Component;
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/** Card sub-components for structured content */
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const VCardActions: Component;
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const VCardItem: Component;
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const VCardSubtitle: Component;
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const VCardText: Component;
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const VCardTitle: Component;
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/** Alert component for displaying important messages */
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const VAlert: Component;
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const VAlertTitle: Component;
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/** Avatar component for user profile images */
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const VAvatar: Component;
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/** Badge component for notification indicators */
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const VBadge: Component;
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/** Banner component for prominent notifications */
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const VBanner: Component;
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/** Chip component for tags and filters */
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const VChip: Component;
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const VChipGroup: Component;
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/** Dialog modal component */
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const VDialog: Component;
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/** Divider line component */
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const VDivider: Component;
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/** Icon display component */
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const VIcon: Component;
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/** Image component with lazy loading and aspect ratio support */
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const VImg: Component;
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```
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**Usage Examples:**
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```typescript
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// Basic button usage
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<template>
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  <v-btn color="primary" size="large" @click="handleClick">
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    Click Me
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  </v-btn>
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</template>
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// Card with structured content
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<template>
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  <v-card>
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    <v-card-title>Card Title</v-card-title>
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    <v-card-subtitle>Card Subtitle</v-card-subtitle>
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    <v-card-text>
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      Card content goes here
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    </v-card-text>
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    <v-card-actions>
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      <v-btn>Action</v-btn>
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    </v-card-actions>
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  </v-card>
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</template>
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// Alert with title
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<template>
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  <v-alert type="success" variant="tonal">
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    <v-alert-title>Success!</v-alert-title>
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    Operation completed successfully.
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  </v-alert>
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</template>
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```
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### Layout Components
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Components for creating responsive layouts and organizing content.
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```typescript { .api }
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/** Grid container component for responsive layouts */
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const VContainer: Component;
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/** Grid row component */
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const VRow: Component;
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/** Grid column component with responsive breakpoint support */
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const VCol: Component;
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/** Flexible spacer component */
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const VSpacer: Component;
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/** Layout wrapper component */
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const VLayout: Component;
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/** Main content area component */
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const VMain: Component;
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/** Application footer component */
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const VFooter: Component;
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/** Base sheet/surface component for elevation and styling */
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const VSheet: Component;
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/** Responsive wrapper with aspect ratio support */
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const VResponsive: Component;
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```
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**Usage Examples:**
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```typescript
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// Responsive grid layout
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<template>
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  <v-container>
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    <v-row>
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      <v-col cols="12" md="6">
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        Column 1
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      </v-col>
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      <v-col cols="12" md="6">
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        Column 2
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      </v-col>
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    </v-row>
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  </v-container>
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</template>
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// Basic app layout
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<template>
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  <v-app>
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    <v-layout>
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      <v-main>
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        <v-container>
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          App content
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        </v-container>
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      </v-main>
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    </v-layout>
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  </v-app>
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</template>
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```
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### Input Components
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Form input components with Material Design styling and validation.
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```typescript { .api }
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/** Base input component */
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const VInput: Component;
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/** Single-line text input field */
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const VTextField: Component;
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/** Multi-line text input area */
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const VTextarea: Component;
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/** Select dropdown component */
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const VSelect: Component;
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/** Combobox with free text input */
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const VCombobox: Component;
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/** Autocomplete input with filtering */
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const VAutocomplete: Component;
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/** Checkbox input component */
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const VCheckbox: Component;
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/** Radio button input */
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const VRadio: Component;
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/** Radio button group */
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const VRadioGroup: Component;
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/** Toggle switch component */
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const VSwitch: Component;
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/** Slider input component */
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const VSlider: Component;
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/** Range slider with dual handles */
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const VRangeSlider: Component;
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/** File upload input */
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const VFileInput: Component;
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/** Numeric input with controls */
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const VNumberInput: Component;
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/** One-time password input */
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const VOtpInput: Component;
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/** Base form field wrapper */
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const VField: Component;
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/** Form label component */
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const VLabel: Component;
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/** Selection control base component */
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const VSelectionControl: Component;
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/** Selection control group */
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const VSelectionControlGroup: Component;
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```
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**Usage Examples:**
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```typescript
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// Text field with validation
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<template>
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  <v-text-field
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    v-model="email"
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    label="Email"
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    type="email"
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    :rules="emailRules"
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    required
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  />
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</template>
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// Select dropdown
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<template>
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  <v-select
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    v-model="selectedItem"
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    :items="items"
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    label="Choose an option"
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    item-title="name"
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    item-value="id"
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  />
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</template>
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// Checkbox group
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<template>
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  <div>
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    <v-checkbox
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      v-model="selected"
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      label="Option 1"
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      value="option1"
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    />
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    <v-checkbox
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      v-model="selected"
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      label="Option 2"
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      value="option2"
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    />
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  </div>
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</template>
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```
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### Display Components
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Components for organizing and displaying content in various formats.
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```typescript { .api }
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/** Expandable content panel */
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const VExpansionPanel: Component;
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/** List display component */
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const VList: Component;
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/** Empty state illustration component */
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const VEmptyState: Component;
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/** Code display component with syntax highlighting */
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const VCode: Component;
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/** Counter display component */
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const VCounter: Component;
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/** Keyboard shortcut display */
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const VKbd: Component;
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/** Message display component */
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const VMessages: Component;
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/** Sparkline chart visualization */
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const VSparkline: Component;
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/** Rating display and input component */
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const VRating: Component;
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/** Timeline display component */
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const VTimeline: Component;
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/** Item group container */
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const VItemGroup: Component;
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/** Slide group container */
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const VSlideGroup: Component;
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/** Button group container */
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const VBtnGroup: Component;
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/** Button toggle group */
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const VBtnToggle: Component;
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```
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**Usage Examples:**
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```typescript
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// List with items
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<template>
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  <v-list>
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    <v-list-item
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      v-for="item in items"
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      :key="item.id"
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      :title="item.title"
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      :subtitle="item.subtitle"
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    />
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  </v-list>
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</template>
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// Expansion panels
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<template>
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  <v-expansion-panels>
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    <v-expansion-panel title="Panel 1">
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      Panel 1 content
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    </v-expansion-panel>
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    <v-expansion-panel title="Panel 2">
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      Panel 2 content
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    </v-expansion-panel>
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  </v-expansion-panels>
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</template>
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// Rating component
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<template>
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  <v-rating
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    v-model="rating"
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    :length="5"
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    color="yellow-darken-3"
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  />
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</template>
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```
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### Overlay Components
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Components for creating overlays, modals, and floating content.
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```typescript { .api }
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/** Base overlay component for backdrops and positioning */
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const VOverlay: Component;
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/** Tooltip overlay component */
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const VTooltip: Component;
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/** Context/dropdown menu */
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const VMenu: Component;
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/** Bottom sheet modal component */
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const VBottomSheet: Component;
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/** Hover state detection wrapper */
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const VHover: Component;
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/** Lazy loading wrapper */
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const VLazy: Component;
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/** No server-side rendering wrapper */
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const VNoSsr: Component;
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```
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**Usage Examples:**
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```typescript
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// Tooltip
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<template>
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  <v-tooltip text="Tooltip text">
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    <template #activator="{ props }">
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      <v-btn v-bind="props">
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        Hover me
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      </v-btn>
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    </template>
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  </v-tooltip>
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</template>
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// Menu
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<template>
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  <v-menu>
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    <template #activator="{ props }">
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      <v-btn v-bind="props">
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        Open Menu
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      </v-btn>
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    </template>
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    <v-list>
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      <v-list-item title="Item 1" />
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      <v-list-item title="Item 2" />
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    </v-list>
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  </v-menu>
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</template>
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```
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### Specialized Components
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Components for specific use cases and advanced functionality.
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```typescript { .api }
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/** Color picker with palette */
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const VColorPicker: Component;
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/** Date selection picker */
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const VDatePicker: Component;
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/** Time selection picker */
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const VTimePicker: Component;
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/** Image/content carousel */
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const VCarousel: Component;
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/** Parallax scrolling effect */
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const VParallax: Component;
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/** Floating action button */
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const VFab: Component;
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/** Speed dial floating menu */
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const VSpeedDial: Component;
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/** Step-by-step wizard component */
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const VStepper: Component;
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/** Tab/window content container */
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const VWindow: Component;
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/** Pagination navigation */
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const VPagination: Component;
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/** Inline edit confirmation */
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const VConfirmEdit: Component;
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/** Validation wrapper component */
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const VValidation: Component;
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/** Component defaults provider */
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const VDefaultsProvider: Component;
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/** Theme context provider */
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const VThemeProvider: Component;
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/** Locale context provider */
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const VLocaleProvider: Component;
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```
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**Usage Examples:**
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```typescript
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// Date picker
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<template>
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  <v-date-picker
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    v-model="selectedDate"
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    :allowed-dates="allowedDates"
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  />
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</template>
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// Stepper
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<template>
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  <v-stepper v-model="step">
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    <v-stepper-header>
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      <v-stepper-item :complete="step > 1" step="1" title="Step 1" />
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      <v-divider />
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      <v-stepper-item :complete="step > 2" step="2" title="Step 2" />
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    </v-stepper-header>
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    <v-stepper-window v-model="step">
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      <v-stepper-window-item :value="1">
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        Step 1 content
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      </v-stepper-window-item>
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      <v-stepper-window-item :value="2">
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        Step 2 content
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      </v-stepper-window-item>
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    </v-stepper-window>
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  </v-stepper>
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</template>
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// Carousel
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<template>
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  <v-carousel>
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    <v-carousel-item
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      v-for="item in items"
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      :key="item.id"
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      :src="item.image"
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    />
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  </v-carousel>
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</template>
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```
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## Types
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```typescript { .api }
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// Base component type
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interface Component {
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  __vccOpts?: any;
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  [key: string]: any;
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}
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// Common component props
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interface BaseProps {
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  class?: string;
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  style?: string | Record<string, any>;
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  id?: string;
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}
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// Color prop type
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type Color = string | 'primary' | 'secondary' | 'accent' | 'error' | 'info' | 'success' | 'warning';
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// Size prop type
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type Size = 'x-small' | 'small' | 'default' | 'large' | 'x-large';
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// Variant prop type  
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type Variant = 'elevated' | 'flat' | 'tonal' | 'outlined' | 'text' | 'plain';
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// Density prop type
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type Density = 'default' | 'comfortable' | 'compact';
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// Position prop type
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type Position = 'static' | 'relative' | 'fixed' | 'absolute' | 'sticky';
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```