> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/metabase/metabase/llms.txt
> Use this file to discover all available pages before exploring further.

# Event handlers

> Handle events and user interactions in embedded Metabase components

The Metabase Embedding SDK provides event handlers to respond to user interactions and component lifecycle events.

## Global event handlers

Set up global event handlers in the `MetabaseProvider`:

```tsx theme={null}
import { MetabaseProvider } from '@metabase/embedding-sdk-react';

const eventHandlers = {
  onDashboardLoad: (dashboard) => {
    console.log('Dashboard loaded:', dashboard);
  },
  onDashboardLoadWithoutCards: (dashboard) => {
    console.log('Dashboard structure loaded:', dashboard);
  },
};

function App() {
  return (
    <MetabaseProvider
      authConfig={authConfig}
      eventHandlers={eventHandlers}
    >
      {/* Your app */}
    </MetabaseProvider>
  );
}
```

## Dashboard events

### onLoad

Triggered when a dashboard loads with all visible cards and their content:

```tsx theme={null}
<InteractiveDashboard
  dashboardId={1}
  onLoad={(dashboard) => {
    console.log('Dashboard name:', dashboard?.name);
    console.log('Number of cards:', dashboard?.dashcards?.length);
    
    // Track analytics
    analytics.track('Dashboard Viewed', {
      dashboardId: dashboard?.id,
      name: dashboard?.name,
    });
  }}
/>
```

### onLoadWithoutCards

Triggered after a dashboard loads, but without its cards (only the dashboard title, tabs, and cards grid are rendered):

```tsx theme={null}
<InteractiveDashboard
  dashboardId={1}
  onLoadWithoutCards={(dashboard) => {
    console.log('Dashboard structure loaded');
    console.log('Dashboard has', dashboard?.tabs?.length || 0, 'tabs');
    
    // Show loading indicator
    setIsLoadingCards(false);
  }}
/>
```

### Complete dashboard example

```tsx theme={null}
import { InteractiveDashboard, MetabaseDashboard } from '@metabase/embedding-sdk-react';
import { useState } from 'react';

function Analytics() {
  const [loadTime, setLoadTime] = useState<number | null>(null);
  const [dashboard, setDashboard] = useState<MetabaseDashboard | null>(null);

  const handleLoad = (loadedDashboard: MetabaseDashboard | null) => {
    setDashboard(loadedDashboard);
    const endTime = performance.now();
    setLoadTime(endTime - startTime);
    
    // Track performance
    analytics.track('Dashboard Load Time', {
      dashboardId: loadedDashboard?.id,
      loadTime: endTime - startTime,
    });
  };

  const startTime = performance.now();

  return (
    <div>
      {loadTime && (
        <div className="stats">
          Loaded in {loadTime.toFixed(0)}ms
        </div>
      )}
      
      <InteractiveDashboard
        dashboardId={1}
        onLoad={handleLoad}
        onLoadWithoutCards={(dashboard) => {
          console.log('Structure loaded for:', dashboard?.name);
        }}
      />
    </div>
  );
}
```

## Question events

### onRun

Triggered when a question is executed:

```tsx theme={null}
<InteractiveQuestion
  questionId={1}
  onRun={(question) => {
    console.log('Question executed:', question);
    console.log('Query:', question.query());
    
    // Track query execution
    analytics.track('Question Run', {
      questionId: question.id(),
    });
  }}
/>
```

### onSave

Triggered when a question is saved:

```tsx theme={null}
<InteractiveQuestion
  questionId={1}
  isSaveEnabled={true}
  onSave={(question) => {
    console.log('Question saved:', question);
    console.log('New question ID:', question.id());
    
    // Show success message
    toast.success('Question saved successfully!');
    
    // Navigate to the saved question
    navigate(`/question/${question.id()}`);
  }}
/>
```

### onBeforeSave

Triggered before a question is saved, allowing you to validate or modify the question:

```tsx theme={null}
<InteractiveQuestion
  questionId={1}
  isSaveEnabled={true}
  onBeforeSave={(question) => {
    console.log('About to save:', question);
    
    // Validate question name
    const name = question.displayName();
    if (!name || name.trim() === '') {
      alert('Please provide a name for this question');
      // Note: This won't prevent the save, just logs a warning
    }
  }}
/>
```

### onNavigateBack

Triggered when the back button is clicked:

```tsx theme={null}
import { useNavigate } from 'react-router-dom';

function QuestionView() {
  const navigate = useNavigate();

  return (
    <InteractiveQuestion
      questionId={1}
      onNavigateBack={() => {
        console.log('Back button clicked');
        navigate('/dashboards');
      }}
    />
  );
}
```

## Visualization events

### onVisualizationChange

Triggered when the visualization type changes:

```tsx theme={null}
<InteractiveQuestion
  questionId={1}
  onVisualizationChange={(question) => {
    console.log('Visualization changed to:', question.display());
    
    // Track visualization changes
    analytics.track('Visualization Changed', {
      questionId: question.id(),
      newType: question.display(),
    });
  }}
/>
```

Also works with dashboards:

```tsx theme={null}
<InteractiveDashboard
  dashboardId={1}
  onVisualizationChange={(question) => {
    console.log('Card visualization changed:', question.display());
  }}
/>
```

## Collection browser events

### onClick

Triggered when an item is clicked:

```tsx theme={null}
import { CollectionBrowser, MetabaseCollectionItem } from '@metabase/embedding-sdk-react';
import { useNavigate } from 'react-router-dom';

function Collections() {
  const navigate = useNavigate();

  const handleItemClick = (item: MetabaseCollectionItem) => {
    console.log('Clicked:', item);
    
    // Track clicks
    analytics.track('Collection Item Clicked', {
      itemId: item.id,
      itemType: item.model,
      itemName: item.name,
    });

    // Navigate based on type
    switch (item.model) {
      case 'dashboard':
        navigate(`/dashboard/${item.id}`);
        break;
      case 'card':
      case 'dataset':
        navigate(`/question/${item.id}`);
        break;
      case 'collection':
        // Navigation handled automatically
        console.log('Navigating to collection:', item.name);
        break;
    }
  };

  return (
    <CollectionBrowser
      collectionId="root"
      onClick={handleItemClick}
    />
  );
}
```

## Analytics integration

### Google Analytics

```tsx theme={null}
import { InteractiveDashboard } from '@metabase/embedding-sdk-react';
import ReactGA from 'react-ga4';

function AnalyticsDashboard() {
  return (
    <InteractiveDashboard
      dashboardId={1}
      onLoad={(dashboard) => {
        ReactGA.event({
          category: 'Dashboard',
          action: 'View',
          label: dashboard?.name,
        });
      }}
    />
  );
}
```

### Segment

```tsx theme={null}
import { InteractiveQuestion } from '@metabase/embedding-sdk-react';
import { useAnalytics } from '@segment/analytics-react';

function QuestionView() {
  const analytics = useAnalytics();

  return (
    <InteractiveQuestion
      questionId={1}
      onRun={(question) => {
        analytics.track('Question Executed', {
          questionId: question.id(),
          questionName: question.displayName(),
        });
      }}
      onSave={(question) => {
        analytics.track('Question Saved', {
          questionId: question.id(),
          questionName: question.displayName(),
        });
      }}
    />
  );
}
```

### Mixpanel

```tsx theme={null}
import { InteractiveDashboard } from '@metabase/embedding-sdk-react';
import mixpanel from 'mixpanel-browser';

function Dashboard() {
  return (
    <InteractiveDashboard
      dashboardId={1}
      onLoad={(dashboard) => {
        mixpanel.track('Dashboard Viewed', {
          dashboard_id: dashboard?.id,
          dashboard_name: dashboard?.name,
          card_count: dashboard?.dashcards?.length,
        });
      }}
    />
  );
}
```

## Error handling

Handle errors using a custom error component:

```tsx theme={null}
import { MetabaseProvider } from '@metabase/embedding-sdk-react';

const CustomError = ({ message }) => {
  // Log error to monitoring service
  console.error('SDK Error:', message);
  
  // Track error
  analytics.track('SDK Error', { message });

  return (
    <div className="error-container">
      <h2>Something went wrong</h2>
      <p>{message}</p>
      <button onClick={() => window.location.reload()}>
        Reload
      </button>
    </div>
  );
};

function App() {
  return (
    <MetabaseProvider
      authConfig={authConfig}
      errorComponent={CustomError}
    >
      {/* Your app */}
    </MetabaseProvider>
  );
}
```

## Performance monitoring

```tsx theme={null}
import { InteractiveDashboard, MetabaseDashboard } from '@metabase/embedding-sdk-react';
import { useEffect, useState } from 'react';

function PerformanceMonitoring() {
  const [startTime] = useState(performance.now());
  const [metrics, setMetrics] = useState<{
    structureLoadTime?: number;
    fullLoadTime?: number;
  }>({});

  return (
    <>
      {metrics.fullLoadTime && (
        <div className="performance-metrics">
          <p>Structure load: {metrics.structureLoadTime?.toFixed(0)}ms</p>
          <p>Full load: {metrics.fullLoadTime?.toFixed(0)}ms</p>
        </div>
      )}
      
      <InteractiveDashboard
        dashboardId={1}
        onLoadWithoutCards={(dashboard) => {
          const loadTime = performance.now() - startTime;
          setMetrics(prev => ({ ...prev, structureLoadTime: loadTime }));
          
          // Send to monitoring service
          monitoring.recordMetric('dashboard.structure.load', loadTime);
        }}
        onLoad={(dashboard) => {
          const loadTime = performance.now() - startTime;
          setMetrics(prev => ({ ...prev, fullLoadTime: loadTime }));
          
          // Send to monitoring service
          monitoring.recordMetric('dashboard.full.load', loadTime);
        }}
      />
    </>
  );
}
```

## Event handler types

```typescript theme={null}
import type {
  MetabaseDashboard,
  MetabaseQuestion,
  MetabaseCollectionItem,
  SdkEventHandlersConfig,
} from '@metabase/embedding-sdk-react';

// Global event handlers
const eventHandlers: SdkEventHandlersConfig = {
  onDashboardLoad: (dashboard: MetabaseDashboard | null) => {
    // Handle dashboard load
  },
  onDashboardLoadWithoutCards: (dashboard: MetabaseDashboard | null) => {
    // Handle dashboard structure load
  },
};

// Component-specific handlers
type OnLoad = (dashboard: MetabaseDashboard | null) => void;
type OnRun = (question: MetabaseQuestion) => void;
type OnSave = (question: MetabaseQuestion) => void;
type OnClick = (item: MetabaseCollectionItem) => void;
```

## Best practices

### Debounce frequent events

For events that fire frequently, consider debouncing:

```tsx theme={null}
import { useCallback } from 'react';
import { debounce } from 'lodash';

function QuestionView() {
  const debouncedRun = useCallback(
    debounce((question) => {
      console.log('Question run:', question);
      analytics.track('Question Run', { questionId: question.id() });
    }, 1000),
    []
  );

  return (
    <InteractiveQuestion
      questionId={1}
      onRun={debouncedRun}
    />
  );
}
```

### Use error boundaries

```tsx theme={null}
import { Component, ReactNode } from 'react';

class ErrorBoundary extends Component<
  { children: ReactNode },
  { hasError: boolean }
> {
  state = { hasError: false };

  static getDerivedStateFromError() {
    return { hasError: true };
  }

  componentDidCatch(error, errorInfo) {
    console.error('Error caught:', error, errorInfo);
    analytics.track('Component Error', { error: error.message });
  }

  render() {
    if (this.state.hasError) {
      return <h1>Something went wrong.</h1>;
    }
    return this.props.children;
  }
}

function App() {
  return (
    <ErrorBoundary>
      <MetabaseProvider authConfig={authConfig}>
        <InteractiveDashboard dashboardId={1} />
      </MetabaseProvider>
    </ErrorBoundary>
  );
}
```

### Track user journeys

```tsx theme={null}
import { useState } from 'react';

function Analytics() {
  const [journey, setJourney] = useState<string[]>([]);

  const addToJourney = (event: string) => {
    setJourney(prev => [...prev, event]);
    console.log('User journey:', [...journey, event]);
  };

  return (
    <CollectionBrowser
      onClick={(item) => {
        addToJourney(`clicked_${item.model}_${item.id}`);
      }}
    />
  );
}
```

## Related

* [Configuration](/sdk/configuration) - SDK configuration
* [TypeScript types](/sdk/typescript-types) - Type definitions