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(SL) XState v4 code on v5: no error, just NaN

XState v5 迁移破坏 v4 代码,存在细微的上下文更新问题

XState v5 于 2023 年 12 月发布,在其迁移指南中引入了一个细微的破坏性变更,即实现函数现在期望一个包含 context、event 和其他属性的单一对象参数。使用旧的 v4 风格编写的代码可能不会抛出错误,但会产生不正确的结果,例如上下文更新出现 NaN,因为 `context.cycles` 变为 undefined。提供了使用 XState v5.33.2 的交通灯模型测试配方,演示了正确的 v5 动作语法。 AI

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XState v5 迁移破坏 v4 代码,存在细微的上下文更新问题

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该条目讨论了软件库版本的一个特定问题,并提供了一个实际的示例/配方,符合“工具”类别。
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报道来源 [1]

  1. dev.to — MCP tag TIER_1 (SL) · ProvenPin ·

    XState v4 代码迁移至 v5:无报错,仅出现 NaN

    <p>XState v5 shipped in December 2023, and its <a href="https://stately.ai/docs/migration" rel="noopener noreferrer">migration guide</a> lists a breaking change that is easy to miss: implementation functions now take a single object argument with <code>context</code>, <code>event…