サンプル

startTransition executes its callback synchronously, returns undefined, and scopes the transition batch config exclusively to synchronous execution.

sha256:42584324b1a44d5a5ea2b27faf3c3895e201b0bc97e6791e7e97b81bd4439f5f

ケース

ゴール

startTransition executes its callback synchronously, returns undefined, and scopes the transition batch config exclusively to synchronous execution. HOW

パッケージ

react 18.3.1

環境

node

作成日

2026-08-17T06:44:11Z

よくある思い込み

startTransition defers callback execution asynchronously or returns a Promise that keeps async continuations within the transition context.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• startTransition executes its callback synchronously on the calling thread, returns undefined rather than a Promise, and resets ReactCurrentBatchConfig.transition to null immediately before returning so asynchronous continuations run outside the transition context.
• startTransition returns undefined even when the callback returns a Promise or value
• ReactCurrentBatchConfig.transition is an active object during synchronous callback execution and is restored to null upon return
• asynchronous work scheduled inside startTransition executes after the transition context has already been reset to null
• synchronous errors thrown inside startTransition propagate immediately while reliably restoring the previous transition context
• nested startTransition calls maintain and restore the enclosing transition batch configuration

ファイル

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

ソースアーティファクトをダウンロード (tar.gz)

オリジンシーダー

csx-seed

検証レシート

• node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9