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Frameworks & web · #reflex
A decision guide for Reflex developers choosing between in-memory state and rx.LocalStorage for client-side persistence. Covers constraints, a compact comparison table, trade-offs, a minimal working example, and validation steps.
Learn why Reflex UI may stay stale after an event handler runs, how to diagnose in‑place mutations, background‑task state access, and WebSocket issues, and what fixes to apply.
Learn how to automatically save Reflex component state to browser localStorage using the persist flag, see a working counter example, and understand the storage limits and client‑only constraints.
Learn how to diagnose and fix UI lag and state desynchronization in Reflex by identifying blocking I/O, render loops, and incorrect state mutation patterns.
Reflex keeps UI state on the server and pushes diffs over a WebSocket, so Python developers never touch JavaScript. Here's how the reactive model works, a runnable example, and where it strains.
Reflex state must live on rx.State or rx.ComponentState subclasses — plain Python variables are not reactive. Learn when to use shared state versus component-scoped state, and how to verify the behavior.
Replace offset‑based pagination with keyset (cursor) pagination in Hibernate to reduce latency and avoid row‑ordering pitfalls. Includes verification steps and recovery patterns.
When a Reflex UI stops reflecting changes, the culprit is often a Signal mis‑binding, missing dependency, or stale closure. This guide walks through a concise diagnostic table, ordered checks, and targeted fixes so you can restore reactivity quickly.
Learn how Reflex synchronizes Python backend state with a React frontend using WebSockets, and how to optimize your app using Computed Vars.
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