@1771technologies/lytenyte-pro/dist/cell-selection/is-fully-within-rect.js

Blazingly fast headless React data grid with 100s of features.

export function isFullyWithinRect(pos, rect) {
    return (pos.rowStart !== rect.rowStart &&
        pos.rowEnd !== rect.rowEnd &&
        pos.columnStart !== rect.columnStart &&
        pos.columnEnd !== rect.columnEnd);
}