When is `useEffectEvent` appropriate, and when should a value remain an Effect dependency?

Separates reactive synchronization inputs from non-reactive logic that still needs the latest props or state.

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TL;DR

A value stays in the dependency list when changing it means the external synchronization must rerun. I use useEffectEvent for logic called from an Effect that should read the latest props or state without making the Effect resubscribe. For example, changing a room ID reconnects a chat, while changing the current theme only changes the notification shown after connection.

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React 19 Effect Events, dependency reasoning, stale closures, reconnection behavior, and misuse boundaries.

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Core answer
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Overview
Effect Events solve a narrow stale-closure problem; they are not a general escape hatch from reactive dependencies.
A value stays in the dependency list when changing it means the external synchronization must rerun. I use useEffectEvent for logic called from an Effect that should read the latest props or state without making the Effect resubscribe. For example, changing a room ID reconnects a chat, while changing the current theme only changes the notification shown after connection.
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Stronger answer
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I first describe the Effect's lifecycle in plain language. Its dependencies are the values that define that lifecycle, such as a URL, room, or subscription key. Notification text, analytics context, or another non-reactive read can move into an Effect Event if it must be current when invoked. I do not use it to hide a missing dependency, pass it to children, or call it outside Effects. The lint rules are useful evidence, not an obstacle to suppress.

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Details

Using an Effect Event to silence every dependency warning.
Removing a value that defines the subscription identity.
Calling an Effect Event from user events or child components.

When is `useEffectEvent` appropriate, and when should a value remain an Effect dependency?

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