fn
dropIndexAt
The boundary a vertical position points at: k means "before row k", and
rows.length is the end. Rows are in document order, so the answer is a
binary search over their midpoints — no hit-testing, no DOM.
Signature
ts
export function dropIndexAt(rows: readonly BlockRow[], y: number): number{ ... }Parameters
| Parameter | Type | Description |
|---|---|---|
rows | readonly BlockRow[] | — |
y | number | — |
Returns
number