Events

Timescope emits events when time, zoom, or selection range changes. Events are emitted for both user interactions and programmatic updates.

Event Flow

Timescope Events

Event	When
timechanging	During time change
timechanged	Time change complete
zoomchanging	During zoom change
zoomchanged	Zoom change complete
selectionchanging	During selection resize
selectionchanged	Selection update complete

import { Timescope } from 'timescope';

const timescope = new Timescope({
  target: '#timescope',
  style: { height: '160px' },
});

timescope.on('timechanged', (e) => {
  console.log('Time:', e.value?.toString() ?? 'now');
});

timescope.on('zoomchanged', (e) => {
  console.log('Zoom:', e.value.toString());
});

timescope.on('selectionchanged', (e) => {
  const payload = e.value ? e.value.map((t) => t.toString()) : 'none';
  console.log('Selection:', payload);
});

Cleanup

Event listeners return a cleanup function:

const unsubscribe = timescope.on('timechanged', (e) => {
  console.log(e.value);
});

// Later
unsubscribe();

See Also

• API Reference for complete event signatures
• Examples for practical usage