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HarmonyOS @State Blind to Singleton Tweaks

Toggling a property in a @State singleton? Your HarmonyOS UI stays stubbornly static. Here's the cynical truth and fixes from 20 years of watching frameworks flop.

DevTools Feed Apr 03, 2026 3 min read 11 views

HarmonyOS ArkUI code showing @State singleton not refreshing UI with toggle example

⚡ Key Takeaways

@State skips inner class changes—@Observed or AppStorage required. 𝕏
AppStorage/@StorageLink enables cross-page singleton sync effortlessly. 𝕏
Singletons risk global state pitfalls; HarmonyOS exposes old dev sins. 𝕏

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#@Observed #@State #AppStorage #ArkTS #ArkUI #HarmonyOS #UI Reactivity #state management

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Originally reported by dev.to

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