Fill Handle

Drag the fill handle at the bottom-right corner of a selected cell to auto-fill adjacent cells, like in Excel. Pattern detection supports constants, arithmetic sequences, date sequences, and repeating values.

Core primitives

The fill handle logic lives in packages/core/src/features/fillHandle.ts. The React hook useFillHandle in @zvndev/yable-react wires it into a live table.

import { detectPattern } from '@zvndev/yable-core'

// Detect a pattern from source values, then project it over the destination range
const pattern = detectPattern([1, 2, 3])
// -> { type: 'sequence', start: 1, step: 1 }

Notes

• Supported patterns: constant, sequence (numeric), date-sequence, and repeat
• Fully covered by packages/core/src/features/__tests__/fillHandle.test.ts

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