,<これ/>,.."><これはchild/>,<これ/>,..
index: number,
// The ref last used to attach this node.
// I'll avoid adding an owner field for prod and model that as functions.
ref:
| null
| (((handle: mixed) => void) & {_stringRef: ?string, ...})
| RefObject,
pendingProps: any, // 実行の最初に設定される引数
memoizedProps: any, // 実行の最後に設定される引数
// A queue of state updates and callbacks.
updateQueue: mixed,
// The state used to create the output
memoizedState: any,
// Dependencies (contexts, events) for this fiber, if it has any
dependencies: Dependencies | null,
mode: TypeOfMode,
// 処理中のfiber
alternate: Fiber | null,
|};