Function createIndentCache

xml/stringify.ts:80–86

* Creates a memoized indent getter to avoid recomputing indent.repeat(depth).

(
  indent: string | undefined,
)

 * Creates a memoized indent getter to avoid recomputing indent.repeat(depth).
 */
function createIndentCache(
  indent: string | undefined,
): (depth: number) => string {
  if (indent === undefined) return () => "";
  const cache: string[] = [""];
  return (depth: number): string => (cache[depth] ??= indent.repeat(depth));
}

/**
 * Serializes an XML element and its children to a string.