Jaspr, a Dart-based web framework inspired by Flutter, addresses SSR hydration complexity through automatic state synchronization. Unlike React or Vue where developers manually manage server-client data boundaries with directives like 'use client', Jaspr uses the @sync annotation and PreloadStateMixin to automatically serialize and transfer component state from server to client. The post covers handling non-serializable state (WebSockets, DOM refs) via kIsWeb checks, rendering mode selection (SSR/SSG/CSR via pubspec.yaml), Islands Architecture support via @island for reduced JS payloads, and testing hydration with the jaspr_test package without a real browser. The tradeoff is reduced control over serialization timing in exchange for fewer hydration bugs.
Table of contents
Why manual hydration is error-proneAutomatic state sync reduces cognitive loadHandling non-serializable stateOptimized tree reconciliationWhen to use SSR vs SSG vs CSRGet Muhammed Salih Guler’s stories in your inboxTesting hydration without deployingPerformance characteristics of different hydration strategiesWhat this pattern enablesResources4.4K Impressions1 Comment