--- title: Sharing data across shiny modules, an update | daily.dev description: An in-depth update on strategies for sharing data across Shiny modules in R, revisiting the 'stratégie du petit r' pattern (using reactiveValues() as shared... canonical: https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Sharing data across shiny modules, an update | daily.dev og:description: An in-depth update on strategies for sharing data across Shiny modules in R, revisiting the 'stratégie du petit r' pattern (using reactiveValues() as shared... og:url: https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk og:image: https://api.daily.dev/og/posts/tCxljwfvK.png og:image:alt: Sharing data across shiny modules, an update og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Sharing data across shiny modules, an update **[R-bloggers](https://daily.dev/sources/rbloggers)** · 22 min read · 0 upvotes · 0 comments ## Summary An in-depth update on strategies for sharing data across Shiny modules in R, revisiting the 'stratégie du petit r' pattern (using reactiveValues() as shared state) in response to public criticism. The author defends the approach while acknowledging its pitfalls, emphasizing that naming conventions and proper scoping (using multiple reactiveValues() at different levels) are key to avoiding unmaintainable code. Additional patterns covered include passing reactive objects as function parameters, using R6 objects combined with the {gargoyle} trigger package, session$userData, package-level environments, and external databases like {storr}. The post stresses that no pattern prevents bad code—discipline and context matter most. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Reactive Shiny Apps and Deployment with Google Cloud Run: Intermediate R Shiny Workshop](https://daily.dev/posts/reactive-shiny-apps-and-deployment-with-google-cloud-run-intermediate-r-shiny-workshop-gjubddfpf) · R-bloggers · 0 upvotes · 0 comments - [Inter-Module Communication in a Modular Architecture](https://daily.dev/posts/inter-module-communication-in-a-modular-architecture-wvyyhqrwy) · ProAndroidDev · 0 upvotes · 0 comments - [Component Communication Patterns in React Applications](https://daily.dev/posts/component-communication-patterns-in-react-applications-4niwdcm2o) · Neciu Dan · 18 upvotes · 1 comments - [In Defense of Redux](https://daily.dev/posts/in-defense-of-redux-pcyqzgarj) · ITNEXT · 1 upvotes · 0 comments - [Medium](https://daily.dev/posts/medium-iaeoxktvu) · Medium · 0 upvotes · 0 comments --- Tags: [#architecture](https://daily.dev/tags/architecture), [#r](https://daily.dev/tags/r), [#reactive-programming](https://daily.dev/tags/reactive-programming) [View this post on daily.dev](https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Sharing data across shiny modules, an update","url":"https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk"},"datePublished":"2026-03-10T23:05:16.237Z","dateModified":"2026-03-10T23:05:42.640Z","description":"An in-depth update on strategies for sharing data across Shiny modules in R, revisiting the 'stratégie du petit r' pattern (using reactiveValues() as shared...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e4cec640cc5beea95978171d4ddff265?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e4cec640cc5beea95978171d4ddff265?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"R-bloggers","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"R-bloggers","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/98bcbbdf72774292a55ceda8f2277f1e","url":"https://daily.dev/sources/rbloggers"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/sharing-data-across-shiny-modules-an-update-tcxljwfvk","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"architecture,r,reactive-programming","timeRequired":"PT22M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"R-bloggers","item":"https://daily.dev/sources/rbloggers"},{"@type":"ListItem","position":3,"name":"Sharing data across shiny modules, an update"}]} ```