# Indicator

Indicator component for adding badges, status markers, or notifications to elements. Perfect for showing counts, online status, or alerts.

## Tag

`Indicator`

## Props

| Prop | Type | Default | Description |
| :--- | :--- | :--- | :--- |
| `value` | `string \| VNode \| Signal` | `-` | Content to display as indicator |
| `class` | `string` | `''` | Additional CSS classes for the badge |
| `children` | `VNode` | `-` | Element to attach the indicator to |

## Styling

Indicator uses **daisyUI Indicator and Badge classes**:

| Category | Keywords | Description |
| :--- | :--- | :--- |
| Position | `indicator-start`, `indicator-end`, `indicator-top`, `indicator-bottom` | Indicator position (default: top-end) |
| Badge Color | `badge-primary`, `badge-secondary`, `badge-accent`, `badge-info`, `badge-success`, `badge-warning`, `badge-error` | Badge visual variants |
| Badge Size | `badge-xs`, `badge-sm`, `badge-md`, `badge-lg` | Badge scale |

> For further details, check the [daisyUI Indicator Documentation](https://daisyui.com/components/indicator) – Full reference for CSS classes.

### Example

```javascript
Indicator({ value: "3", class: "badge-primary" },
  Button({ class: "btn" }, "Notifications")
);
```

## Live Examples

### Basic Indicator

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-basic" class="bg-base-100 p-6 rounded-xl border border-base-300 flex flex-wrap gap-8 justify-center"></div>
  </div>
</div>

```javascript
const BasicDemo = () => {
  return Div({ class: 'flex flex-wrap gap-8 justify-center' }, [
    Indicator({ value: '3', class: 'badge-primary' },
      Div({ class: 'w-16 h-16 bg-base-300 rounded-lg flex items-center justify-center' }, '📦')
    ),
    Indicator({ value: '99+', class: 'badge-secondary' },
      Div({ class: 'w-16 h-16 bg-base-300 rounded-lg flex items-center justify-center' }, '🔔')
    ),
    Indicator({ value: 'New', class: 'badge-accent' },
      Div({ class: 'w-16 h-16 bg-base-300 rounded-lg flex items-center justify-center' }, '✨')
    )
  ]);
};
$mount(BasicDemo, '#demo-basic');
```

### Online Status Indicator

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-status" class="bg-base-100 p-6 rounded-xl border border-base-300 flex flex-wrap gap-8 justify-center"></div>
  </div>
</div>

```javascript
const StatusDemo = () => {
  return Div({ class: 'flex flex-wrap gap-8 justify-center' }, [
    Indicator({ value: '●', class: 'badge-success badge-xs' },
      Div({ class: 'avatar placeholder' }, [
        Div({ class: 'bg-neutral text-neutral-content rounded-full w-12 h-12 flex items-center justify-center' }, 'JD')
      ])
    ),
    Indicator({ value: '●', class: 'badge-warning badge-xs' },
      Div({ class: 'avatar placeholder' }, [
        Div({ class: 'bg-neutral text-neutral-content rounded-full w-12 h-12 flex items-center justify-center' }, 'JS')
      ])
    ),
    Indicator({ value: '●', class: 'badge-error badge-xs' },
      Div({ class: 'avatar placeholder' }, [
        Div({ class: 'bg-neutral text-neutral-content rounded-full w-12 h-12 flex items-center justify-center' }, 'BC')
      ])
    )
  ]);
};
$mount(StatusDemo, '#demo-status');
```

### Reactive Counter

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-reactive" class="bg-base-100 p-6 rounded-xl border border-base-300 flex flex-col gap-4 items-center"></div>
  </div>
</div>

```javascript
const ReactiveDemo = () => {
  const count = $(0);
  
  return Div({ class: 'flex flex-col gap-4 items-center' }, [
    Indicator({ 
      value: () => count() > 0 ? count() : null,
      class: 'badge-primary'
    },
      Button({ 
        class: 'btn btn-lg btn-primary',
        onclick: () => count(count() + 1)
      }, 'Notifications')
    ),
    Div({ class: 'flex gap-2' }, [
      Button({ 
        class: 'btn btn-sm',
        onclick: () => count(Math.max(0, count() - 1))
      }, 'Decrease'),
      Button({ 
        class: 'btn btn-sm btn-ghost',
        onclick: () => count(0)
      }, 'Clear')
    ])
  ]);
};
$mount(ReactiveDemo, '#demo-reactive');
```

### Shopping Cart

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-cart" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const CartDemo = () => {
  const cart = $([
    { id: 1, name: 'Product 1', price: 29 },
    { id: 2, name: 'Product 2', price: 49 }
  ]);
  
  const addItem = () => {
    const newId = Math.max(...cart().map(i => i.id), 0) + 1;
    cart([...cart(), { id: newId, name: `Product ${newId}`, price: Math.floor(Math.random() * 100) + 10 }]);
    Toast('Item added to cart', 'alert-success', 1500);
  };
  
  const removeItem = (id) => {
    cart(cart().filter(item => item.id !== id));
    Toast('Item removed', 'alert-info', 1500);
  };
  
  const total = () => cart().reduce((sum, item) => sum + item.price, 0);
  
  return Div({ class: 'flex flex-col gap-4' }, [
    Div({ class: 'flex justify-between items-center' }, [
      Indicator({ 
        value: () => cart().length,
        class: 'badge-primary'
      },
        Button({ class: 'btn', onclick: addItem }, '🛒 Add to Cart')
      ),
      Span({ class: 'text-lg font-bold' }, () => `Total: $${total()}`)
    ]),
    cart().length === 0 
      ? Div({ class: 'alert alert-soft text-center' }, 'Cart is empty')
      : Div({ class: 'flex flex-col gap-2' }, cart().map(item =>
        Div({ class: 'flex justify-between items-center p-2 bg-base-200 rounded-lg' }, [
          Span({}, item.name),
          Div({ class: 'flex gap-2 items-center' }, [
            Span({ class: 'text-sm font-bold' }, `$${item.price}`),
            Button({ 
              class: 'btn btn-xs btn-ghost btn-circle',
              onclick: () => removeItem(item.id)
            }, '✕')
          ])
        ])
      ))
  ]);
};
$mount(CartDemo, '#demo-cart');
```

### Email Inbox

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-inbox" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const InboxDemo = () => {
  const unread = $(3);
  const messages = $([
    { id: 1, from: 'john@example.com', subject: 'Meeting tomorrow', read: false },
    { id: 2, from: 'jane@example.com', subject: 'Project update', read: false },
    { id: 3, from: 'bob@example.com', subject: 'Question about design', read: false },
    { id: 4, from: 'alice@example.com', subject: 'Weekly report', read: true }
  ]);
  
  const markAsRead = (id) => {
    const msg = messages().find(m => m.id === id);
    if (!msg.read) {
      msg.read = true;
      messages([...messages()]);
      unread(unread() - 1);
    }
  };
  
  return Div({ class: 'flex flex-col gap-4' }, [
    Div({ class: 'flex justify-between items-center' }, [
      Indicator({ 
        value: () => unread(),
        class: 'badge-primary'
      },
        Span({ class: 'text-lg font-bold' }, 'Inbox')
      ),
      Button({ 
        class: 'btn btn-sm btn-ghost',
        onclick: () => {
          messages().forEach(m => m.read = true);
          messages([...messages()]);
          unread(0);
        }
      }, 'Mark all read')
    ]),
    Div({ class: 'flex flex-col gap-2' }, messages().map(msg =>
      Div({ 
        class: `p-3 rounded-lg cursor-pointer transition-all ${msg.read ? 'bg-base-200 opacity-60' : 'bg-primary/10 border-l-4 border-primary'}`,
        onclick: () => markAsRead(msg.id)
      }, [
        Div({ class: 'font-medium' }, msg.from),
        Div({ class: 'text-sm' }, msg.subject),
        !msg.read && Span({ class: 'badge badge-xs badge-primary mt-1' }, 'New')
      ])
    ))
  ]);
};
$mount(InboxDemo, '#demo-inbox');
```

### All Variants

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-variants" class="bg-base-100 p-6 rounded-xl border border-base-300 flex flex-wrap gap-8 justify-center"></div>
  </div>
</div>

```javascript
const VariantsDemo = () => {
  return Div({ class: 'flex flex-wrap gap-8 justify-center' }, [
    Indicator({ value: '3', class: 'badge-primary badge-sm' },
      Div({ class: 'w-12 h-12 bg-base-300 rounded-lg flex items-center justify-center' }, '📧')
    ),
    Indicator({ value: '99+', class: 'badge-secondary badge-md' },
      Div({ class: 'w-12 h-12 bg-base-300 rounded-lg flex items-center justify-center' }, '🔔')
    ),
    Indicator({ value: '●', class: 'badge-success badge-xs' },
      Div({ class: 'avatar' }, [
        Div({ class: 'w-10 h-10 rounded-full bg-primary' })
      ])
    ),
    Indicator({ value: '!', class: 'badge-error badge-sm' },
      Div({ class: 'w-12 h-12 bg-base-300 rounded-lg flex items-center justify-center' }, '⚠️')
    )
  ]);
};
$mount(VariantsDemo, '#demo-variants');
```