Function createDOMRange

packages/react-aria/src/tokenfield/useTokenField.ts:753–760

(root: Element, start: Position, end: Position)

}

function createDOMRange(root: Element, start: Position, end: Position): Range {
  let range = document.createRange();
  let [startContainer, startOffset] = getDOMPosition(root, start);
  let [endContainer, endOffset] = getDOMPosition(root, end);
  range.setStart(startContainer, startOffset);
  range.setEnd(endContainer, endOffset);
  return range;
}

function getDOMPosition(root: Element, pos: Position): [Node, number] {
  let index = Math.max(0, Math.min(root.childNodes.length, pos.index));