{"id":13726199,"url":"https://github.com/sikanhe/reason-atomic","last_synced_at":"2026-03-03T22:01:08.619Z","repository":{"id":150945317,"uuid":"182436669","full_name":"sikanhe/reason-atomic","owner":"sikanhe","description":" Dead simple shared state in Reason React with a redux-like interface.","archived":false,"fork":false,"pushed_at":"2019-04-20T20:40:27.000Z","size":8,"stargazers_count":19,"open_issues_count":0,"forks_count":2,"subscribers_count":0,"default_branch":"master","last_synced_at":"2025-12-22T21:45:23.953Z","etag":null,"topics":["reason-react","reasonml","redux","state-management"],"latest_commit_sha":null,"homepage":null,"language":"OCaml","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/sikanhe.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2019-04-20T17:42:53.000Z","updated_at":"2020-09-02T07:11:48.000Z","dependencies_parsed_at":"2023-04-13T05:21:22.705Z","dependency_job_id":null,"html_url":"https://github.com/sikanhe/reason-atomic","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/sikanhe/reason-atomic","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sikanhe%2Freason-atomic","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sikanhe%2Freason-atomic/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sikanhe%2Freason-atomic/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sikanhe%2Freason-atomic/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/sikanhe","download_url":"https://codeload.github.com/sikanhe/reason-atomic/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sikanhe%2Freason-atomic/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":30063348,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-03-03T18:21:05.932Z","status":"ssl_error","status_checked_at":"2026-03-03T18:20:59.341Z","response_time":61,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["reason-react","reasonml","redux","state-management"],"created_at":"2024-08-03T01:02:55.516Z","updated_at":"2026-03-03T22:01:08.603Z","avatar_url":"https://github.com/sikanhe.png","language":"OCaml","funding_links":[],"categories":["OCaml"],"sub_categories":[],"readme":"# Atomic [![npm version](https://img.shields.io/npm/v/reason-atomic.svg)](https://www.npmjs.com/package/reason-atomic)\n\nDead simple shared state in Reason React with a redux-like interface.\n\n# Installation \n\n```bash\nyarn add reason-atomic\n``` \n\nThen add `reason-atomic` to your `bs-dependencies` in `bsconfig.json`\n\n```\n{\n  ...\n  \"bs-dependencies\": [\"reason-atomic\"]\n}\n\n```\n\n# Usage\n\nConfigure your state by creating a module with `state`, `getInitialState`, `action`, and `reducer`.\n\n\n```reason \nmodule Config = {\n  type state = {count: int};\n\n  let getInitialState = () =\u003e {count: 0};\n\n  type action =\n    | Increment\n    | Decrement\n    | NoChange;\n\n  let reducer = state =\u003e\n    fun\n    | Increment =\u003e {count: state.count + 1}\n    | Decrement =\u003e {count: state.count - 1}\n    | NoChange =\u003e state;\n\n}; \n```\n\nCreate a new state module with the config\n\n```reason\nmodule AppState = Atomic.Make(Config);\n// module AppState2 = Atomic.Make(Config);\n// module AppState3 = Atomic.Make(Config);\n\n// Create as many instances as you like..\n```\n\nAccess the state as a hook, and dispatch actions \n\n```reason \n[@react.component]\nlet make = () =\u003e {\n  let state = AppState.useState();\n\n  \u003cdiv\u003e\n    {React.string(\"global count: \" ++ string_of_int(state.count))}\n    \u003cbutton onClick={_ =\u003e AppState.dispatch(Increment)}\u003e {React.string(\"+\")} \u003c/button\u003e\n    \u003cbutton onClick={_ =\u003e AppState.dispatch(Decrement)}\u003e {React.string(\"-\")} \u003c/button\u003e\n  \u003c/div\u003e;\n};\n```\n\nIf you only care about a subset of the state, you can use `useMappedState`. This also means that\nthe component with the hook won't re-render unless the state it cares about changes - avoiding excessive re-rendering.\n\n```reason \n[@react.component]\nlet make = () =\u003e {\n  let count = AppState.useMappedState(state =\u003e state.count);\n\n  \u003cdiv\u003e\n    {React.string(\"global count: \" ++ string_of_int(count))}\n  \u003c/div\u003e;\n};\n```\n\nYou can also use the render-props pattern to consume the state as well, using the `Consumer` \ncomponent and pass the `mapper` prop.\n\n```reason\n[@react.component]\nlet make = () =\u003e {\n  \u003cAppState.Consumer mapper={state =\u003e state.count}\u003e\n    {count =\u003e React.string(\"global count: \" ++ string_of_int(count))}\n  \u003c/AppState.Consumer\u003e;\n};\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsikanhe%2Freason-atomic","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsikanhe%2Freason-atomic","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsikanhe%2Freason-atomic/lists"}