Hacktoberfest 2026:メンテナが10月に向けて印を付けた、オープンで初心者向けの issue。 Hacktoberfest の issue を見る

2.0.0-rc.14: until() through a synchronous memo misses optimistic confirmation

クローズ
#3,943 コメント 0 件 リアクション 0 件 担当者 0 名 GitHub で見る

メンテナーはふだん 1 日以内に返信

まだ誰も着手していません。

評価

難易度
4/5
見積もり時間
3〜5日
初心者へのやさしさ
35/100
issue の種類
バグ
明瞭さ
明確に書かれている
活発さ
活発
技術スタック
typescript
領域
frontend

調査の方向性

Start by reproducing with the playground component in the issue, then swap the predicate between doubled() and count() to confirm the memo is the difference. The payload names no source files, so you will need to find where until() subscribes and how a synchronous createMemo propagates optimistic values on confirmation. Done when yield until(() => doubled() === 2) completes after setSource(1), matching the direct-read control.

索引モデルが issue の本文から書いたものです。

説明

Describe the bug

On 2.0.0-rc.14, an action waiting with until() through a synchronous memo remains pending when the actual source confirms its optimistic prediction. Reading the optimistic accessor directly in the predicate completes the same action.

The predicate subscribes before confirmation arrives. The prediction alone correctly does not satisfy the wait, but confirming it does not resolve the wait through the memo either.

Your Example Website or App

https://s.olid.uk/?id=d1d1a3ee-70c8-4afe-966d-258809cb4f06

The playground uses published 2.0.0-rc.14. Here is the full component, including the actual source update in the Confirm button:

import { action, createMemo, createOptimistic, createSignal, until } from "solid-js";
import { render } from "solid-js/web";

function App() {
  const [source, setSource] = createSignal(0);
  const [count, guess] = createOptimistic(() => source());
  const doubled = createMemo(() => count() * 2);
  const [completed, setCompleted] = createSignal(false);

  const save = action(function* () {
    guess(1);
    yield Promise.resolve();
    // Direct-read control: yield until(() => count() === 1);
    yield until(() => doubled() === 2);
  });

  return (
    <main>
      <button onClick={() => save().then(() => setCompleted(true))}>1. Start</button>
      <button onClick={() => setSource(1)}>2. Confirm</button>
      <p>Displayed count: {count()}</p>
      <p>Doubled memo: {doubled()}</p>
      <p>Action completed: {String(completed())}</p>
    </main>
  );
}

render(() => <App />, document.getElementById("app")!);
Steps to Reproduce the Bug or Issue
  1. Open the playground and click 1. Start.
  2. The displayed count becomes 1 and the doubled memo becomes 2. Action completion remains false, as expected while the prediction is unconfirmed.
  3. Click 2. Confirm to set the actual source to 1.
  4. Action completion still remains false.
  5. Change the wait to yield until(() => count() === 1), rebuild, and repeat. Action completion becomes true after confirmation.

Both the failing memo case and the successful direct-read control were verified in the browser.

Expected behavior

The optimistic prediction alone should not satisfy until(). Once the actual source confirms the prediction, the predicate through the synchronous memo should resolve and the action should complete, just as the direct-read predicate does.

Platform
  • OS: Linux (WSL)
  • Browser: Chrome for Testing 153.0.8010.12, tested with Playwright
  • Solid: 2.0.0-rc.14
主要言語
TypeScript
スター
36.1k
フォーク
1.1k
平均マージ
10時間 41分
マージ済み PR(30日)
363

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

solidjs/solid のほかの issue

solidjs/solid の issue をすべて見る

似ている issue

TypeScript の issue をもっと見る

新しい issue をメールで受け取る

初心者向けの GitHub issue を短くまとめたダイジェスト。