Function isSubdirectoryOf

valdi/vscode_debugger/src/common/pathUtils.ts:192–195

(parent: string, child: string)

 * Gets whether the child is a subdirectory of its parent.
 */
export const isSubdirectoryOf = (parent: string, child: string) => {
  const rel = path.relative(parent, child);
  return rel.length && !path.isAbsolute(rel) && !rel.startsWith('..');
};

/**
 * Returns whether the path looks like a UNC path.