Function getSourceBetween

packages/cli/src/transform.ts:780–787

(prevNode: any, nextNode: any, source?: string, lineStarts?: number[])

}

function getSourceBetween(prevNode: any, nextNode: any, source?: string, lineStarts?: number[]): string {
  if (!source) return "";
  const starts = lineStarts ?? getLineStarts(source);
  const prevEnd = getNodeIndex(prevNode, "end", starts);
  const nextStart = getNodeIndex(nextNode, "start", starts);
  if (prevEnd == null || nextStart == null || nextStart < prevEnd) return "";
  return source.slice(prevEnd, nextStart);
}

function getRenderedChildText(child: any, source?: string, lineStarts?: number[]): string {
  if (child.type === "JSXText") return collapseRenderedWhitespace(child.value);