Function extendMeta

packages/nextra/src/client/normalize-pages.ts:27–43

(
  _meta: MetaType = {},
  fallback: MetaType,
  metadata: MetaType = {}
)

type MetaType = Record<string, any>

function extendMeta(
  _meta: MetaType = {},
  fallback: MetaType,
  metadata: MetaType = {}
): MetaType {
  const theme: PageTheme = {
    ...fallback.theme,
    ..._meta.theme,
    ...metadata.theme
  }
  return {
    ...fallback,
    ..._meta,
    display: metadata.display || _meta.display || fallback.display,
    theme
  }
}

type FolderWithoutChildren = Omit<Folder, 'children'>