{"id":13547754,"url":"https://github.com/danrigsby/redux-reducer-side-effects","last_synced_at":"2026-05-07T02:35:06.492Z","repository":{"id":57351342,"uuid":"97508992","full_name":"danrigsby/redux-reducer-side-effects","owner":"danrigsby","description":"Easy to follow side effect library for redux reducers","archived":false,"fork":false,"pushed_at":"2017-07-18T13:55:19.000Z","size":68,"stargazers_count":3,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-09-25T23:54:00.661Z","etag":null,"topics":["functional-programming","middleware","react","redux","side-effects"],"latest_commit_sha":null,"homepage":"","language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/danrigsby.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":"docs/CONTRIBUTING.md","funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2017-07-17T18:26:33.000Z","updated_at":"2018-03-31T01:55:43.000Z","dependencies_parsed_at":"2022-08-31T03:50:28.335Z","dependency_job_id":null,"html_url":"https://github.com/danrigsby/redux-reducer-side-effects","commit_stats":null,"previous_names":[],"tags_count":4,"template":false,"template_full_name":null,"purl":"pkg:github/danrigsby/redux-reducer-side-effects","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danrigsby%2Fredux-reducer-side-effects","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danrigsby%2Fredux-reducer-side-effects/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danrigsby%2Fredux-reducer-side-effects/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danrigsby%2Fredux-reducer-side-effects/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/danrigsby","download_url":"https://codeload.github.com/danrigsby/redux-reducer-side-effects/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danrigsby%2Fredux-reducer-side-effects/sbom","scorecard":{"id":321654,"data":{"date":"2025-08-11","repo":{"name":"github.com/danrigsby/redux-reducer-side-effects","commit":"337caf1c421356683aed57b48738397a6f85e09c"},"scorecard":{"version":"v5.2.1-40-gf6ed084d","commit":"f6ed084d17c9236477efd66e5b258b9d4cc7b389"},"score":1.3,"checks":[{"name":"Dangerous-Workflow","score":-1,"reason":"no workflows found","details":null,"documentation":{"short":"Determines if the project's GitHub Action workflows avoid dangerous patterns.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#dangerous-workflow"}},{"name":"Maintained","score":0,"reason":"0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0","details":null,"documentation":{"short":"Determines if the project is \"actively maintained\".","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#maintained"}},{"name":"Packaging","score":-1,"reason":"packaging workflow not detected","details":["Warn: no GitHub/GitLab publishing workflow detected."],"documentation":{"short":"Determines if the project is published as a package that others can easily download, install, easily update, and uninstall.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#packaging"}},{"name":"Binary-Artifacts","score":10,"reason":"no binaries found in the repo","details":null,"documentation":{"short":"Determines if the project has generated executable (binary) artifacts in the source repository.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#binary-artifacts"}},{"name":"SAST","score":0,"reason":"no SAST tool detected","details":["Warn: no pull requests merged into dev branch"],"documentation":{"short":"Determines if the project uses static code analysis.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#sast"}},{"name":"Token-Permissions","score":-1,"reason":"No tokens found","details":null,"documentation":{"short":"Determines if the project's workflows follow the principle of least privilege.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#token-permissions"}},{"name":"Pinned-Dependencies","score":-1,"reason":"no dependencies found","details":null,"documentation":{"short":"Determines if the project has declared and pinned the dependencies of its build process.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#pinned-dependencies"}},{"name":"Code-Review","score":0,"reason":"Found 0/13 approved changesets -- score normalized to 0","details":null,"documentation":{"short":"Determines if the project requires human code review before pull requests (aka merge requests) are merged.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#code-review"}},{"name":"CII-Best-Practices","score":0,"reason":"no effort to earn an OpenSSF best practices badge detected","details":null,"documentation":{"short":"Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#cii-best-practices"}},{"name":"Security-Policy","score":0,"reason":"security policy file not detected","details":["Warn: no security policy file detected","Warn: no security file to analyze","Warn: no security file to analyze","Warn: no security file to analyze"],"documentation":{"short":"Determines if the project has published a security policy.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#security-policy"}},{"name":"Fuzzing","score":0,"reason":"project is not fuzzed","details":["Warn: no fuzzer integrations found"],"documentation":{"short":"Determines if the project uses fuzzing.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#fuzzing"}},{"name":"License","score":0,"reason":"license file not detected","details":["Warn: project does not have a license file"],"documentation":{"short":"Determines if the project has defined a license.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#license"}},{"name":"Signed-Releases","score":-1,"reason":"no releases found","details":null,"documentation":{"short":"Determines if the project cryptographically signs release artifacts.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#signed-releases"}},{"name":"Branch-Protection","score":0,"reason":"branch protection not enabled on development/release branches","details":["Warn: branch protection not enabled for branch 'master'"],"documentation":{"short":"Determines if the default and release branches are protected with GitHub's branch protection settings.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#branch-protection"}},{"name":"Vulnerabilities","score":0,"reason":"60 existing vulnerabilities detected","details":["Warn: Project is vulnerable to: GHSA-v88g-cgmw-v5xw","Warn: Project is vulnerable to: GHSA-93q8-gq69-wqmw","Warn: Project is vulnerable to: GHSA-67hx-6x53-jw92","Warn: Project is vulnerable to: GHSA-v6h2-p8h4-qcjw","Warn: Project is vulnerable to: GHSA-cwfw-4gq5-mrqx","Warn: Project is vulnerable to: GHSA-g95f-p29q-9xw4","Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg","Warn: Project is vulnerable to: GHSA-9vvw-cc9w-f27h","Warn: Project is vulnerable to: GHSA-gxpj-cx7g-858c","Warn: Project is vulnerable to: GHSA-hr2v-3952-633q","Warn: Project is vulnerable to: GHSA-h6ch-v84p-w6p9","Warn: Project is vulnerable to: GHSA-4gmj-3p3h-gm8h","Warn: Project is vulnerable to: GHSA-qrmc-fj45-qfc2","Warn: Project is vulnerable to: GHSA-fjxv-7rqg-78g4","Warn: Project is vulnerable to: GHSA-8r6j-v8pm-fqw3","Warn: Project is vulnerable to: MAL-2023-462","Warn: Project is vulnerable to: GHSA-xf7w-r453-m56c","Warn: Project is vulnerable to: GHSA-4q6p-r6v2-jvc5","Warn: Project is vulnerable to: GHSA-qh2h-chj9-jffq","Warn: Project is vulnerable to: GHSA-44pw-h2cw-w3vq","Warn: Project is vulnerable to: GHSA-jp4x-w63m-7wgm","Warn: Project is vulnerable to: GHSA-c429-5p7v-vgjp","Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj","Warn: Project is vulnerable to: GHSA-qqgx-2p2h-9c37","Warn: Project is vulnerable to: GHSA-4hpf-3wq7-5rpr","Warn: Project is vulnerable to: GHSA-f522-ffg8-j8r6","Warn: Project is vulnerable to: GHSA-2pr6-76vf-7546","Warn: Project is vulnerable to: GHSA-8j8c-7jfh-h6hx","Warn: Project is vulnerable to: GHSA-896r-f27r-55mw","Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h","Warn: Project is vulnerable to: GHSA-282f-qqgm-c34q","Warn: Project is vulnerable to: GHSA-fvqr-27wr-82fm","Warn: Project is vulnerable to: GHSA-4xc9-xhrj-v574","Warn: Project is vulnerable to: GHSA-x5rq-j2xg-h7qm","Warn: Project is vulnerable to: GHSA-jf85-cpcp-j695","Warn: Project is vulnerable to: GHSA-p6mc-m468-83gw","Warn: Project is vulnerable to: GHSA-29mw-wpgm-hmr9","Warn: Project is vulnerable to: GHSA-35jh-r3h4-6jhm","Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv","Warn: Project is vulnerable to: GHSA-f8q6-p94x-37v3","Warn: Project is vulnerable to: GHSA-vh95-rmgr-6w4m","Warn: Project is vulnerable to: GHSA-xvch-5gv4-984h","Warn: Project is vulnerable to: GHSA-w9mr-4mfr-499f","Warn: Project is vulnerable to: GHSA-hj48-42vr-x3v9","Warn: Project is vulnerable to: GHSA-g6ww-v8xp-vmwg","Warn: Project is vulnerable to: GHSA-hrpp-h998-j3pp","Warn: Project is vulnerable to: GHSA-6g33-f262-xjp4","Warn: Project is vulnerable to: GHSA-p8p7-x288-28g6","Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw","Warn: Project is vulnerable to: GHSA-4rq4-32rv-6wp6","Warn: Project is vulnerable to: GHSA-64g7-mvw6-v9qj","Warn: Project is vulnerable to: GHSA-2m39-62fm-q8r3","Warn: Project is vulnerable to: GHSA-mf6x-7mm4-x2g7","Warn: Project is vulnerable to: GHSA-j44m-qm6p-hp7m","Warn: Project is vulnerable to: GHSA-3jfq-g458-7qm9","Warn: Project is vulnerable to: GHSA-5955-9wpr-37jh","Warn: Project is vulnerable to: GHSA-f5x3-32g6-xq36","Warn: Project is vulnerable to: GHSA-g7q5-pjjr-gqvp","Warn: Project is vulnerable to: GHSA-72xf-g2v4-qvf3","Warn: Project is vulnerable to: GHSA-cf4h-3jhx-xvhq"],"documentation":{"short":"Determines if the project has open, known unfixed vulnerabilities.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#vulnerabilities"}}]},"last_synced_at":"2025-08-18T01:30:25.517Z","repository_id":57351342,"created_at":"2025-08-18T01:30:25.517Z","updated_at":"2025-08-18T01:30:25.517Z"},"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":32720369,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-07T02:14:30.463Z","status":"ssl_error","status_checked_at":"2026-05-07T02:14:29.405Z","response_time":62,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 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":["functional-programming","middleware","react","redux","side-effects"],"created_at":"2024-08-01T12:01:00.564Z","updated_at":"2026-05-07T02:35:06.463Z","avatar_url":"https://github.com/danrigsby.png","language":"JavaScript","funding_links":[],"categories":["🚀 A series of exquisite and compact web page cool effects"],"sub_categories":["Other Effect"],"readme":"# redux-reducer-side-effects\n\u003cp align=\"center\"\u003e\n  \u003ca href=\"https://circleci.com/gh/danrigsby/redux-reducer-side-effects\"\u003e\n    \u003cimg src=\"https://circleci.com/gh/danrigsby/redux-reducer-side-effects.svg?style=svg\" alt=\"build status\" /\u003e\n  \u003c/a\u003e\n  \u003ca href=\"https://npmjs.org/package/redux-reducer-side-effects\"\u003e\n    \u003cimg src=\"https://img.shields.io/npm/v/redux-reducer-side-effects.svg\" alt=\"npm version\" /\u003e\n  \u003c/a\u003e\n  \u003ca href=\"https://github.com/danrigsby/redux-reducer-side-effects/blob/master/LICENSE\"\u003e\n    \u003cimg src=\"https://img.shields.io/npm/l/redux-reducer-side-effects.svg\" alt=\"license\" /\u003e\n  \u003c/a\u003e\n  \u003ca href='https://coveralls.io/github/danrigsby/redux-reducer-side-effects?branch=master'\u003e\n    \u003cimg src='https://coveralls.io/repos/github/danrigsby/redux-reducer-side-effects/badge.svg?branch=master' alt='Coverage Status' /\u003e\n  \u003c/a\u003e\n\u003c/p\u003e\n\nEasy to follow side effect library for redux reducers\n\n## Background\n### What is a [Side Effect](https://en.wikipedia.org/wiki/Side_effect_(computer_science))?\nAnything that modifies some state outside its scope or has an observable interaction with its calling functions or the outside world beyond returning a value.\n\nIn redux, this means if your reducer does anything beyond just returning the new state for that reducer, its a side effect and needs to be handled as such.\n\nHowever, often reducers will need to perform some kind of side effect. In these situations, you want to perform these\nside effects \"outside\" of the reducer. For instance:\n1. Inside of a reducer you may want to have the completion of some operation dispatch another operatop on the store.\n2. Reducers should not know about one another direct, but may listen for well known actions between them. \n\n### What does this library do for me?\nThere are a few different side effect libraries out there, but many do more than you need or are hard to follow. Primary goal of this library is to introduce safe side effects in a powerful way, but be simple to read, understand, and implement.\n\nFor instance, say you have two reducers, one for login (loginReducer) and the other for content (contentReducer).  When a user logs in, you want to retrieve content, and when the user logs out, you want to remove the content.\n\n```javascript\nexport default function contentReducer(state, action) {\n  switch (action.type) {\n    case: 'LOGIN': {\n      action.addSideEffect((store) =\u003e {\n        store.dispatch.getContent();\n      });\n      return state;\n    }\n    case: 'LOGOUT': {\n      action.addSideEffect((store) =\u003e {\n        store.dispatch.clearContent();\n      });\n      return state;\n    }\n    default: {\n      return state\n    }\n  }\n}\n```\n## Installation\n``` sh\n# npm\nnpm install redux-reducer-side-effects --save\n\n# yarn\nyarn add redux-reducer-side-effects\n```\n\n## Usage\n### 1. Wire up the [Middleware](http://redux.js.org/docs/advanced/Middleware.html)\nSimply add the [middleware](http://redux.js.org/docs/advanced/Middleware.html) when you create your redux [store](http://redux.js.org/docs/basics/Store.html).\n\n``` javascript\nimport { createStore, applyMiddleware, compose, combineReducers } from 'redux';\nimport addSideEffectMiddleware from 'redux-reducer-side-effects';\nimport reducers from './reducers';\n\nexport default function configureStore() {\n  const enhancers = compose(\n    applyMiddleware(\n      addSideEffectMiddleware()\n    )\n  );\n\n  return createStore(reducers, {}, enhancers);\n}\n```\n\nOptionally, the `addSideEffectMiddleware` can take in an options object that defines:\n1. `timeout`: The default timeout in milliseconds for all side effects (defaults to 0 or no timeout)\n\n``` javascript\n  applyMiddleware(\n    addSideEffectMiddleware({ timeout: 1000 }) // 1 second\n  )\n```\n### 2. Add to Reducers\nThe `addSideEffectMiddleware` adds a new method on the redux reducer `action` called: `addSideEffect`.  \nThis method takes in a function that is passed the entire redux `store`.  This allows the side effect to `getState()` or `dispatch` new actions onto the store.\n\n``` javascript\naction.addSideEffect((store) =\u003e {\n  // Your side effect goes here such as:\n  store.dispatch.newAction(action.myNewAction(store.getState().myData));\n});\n```\n\nOptionally you can also pass in an object to `addSideEffect` that defines two properties:\n1. `effect`: the side effect function as defined above\n2. `timeout`: a timeout in milliseconds to wrap around the `effect` function call\n\n``` javascript\naction.addSideEffect({\n  effect: (store) =\u003e {\n    // Your side effect goes here such as:\n    store.dispatch.newAction(action.myNewAction(store.getState().myData));\n  }\n  timeout: 1000 // 1 second\n});\n```\n\n#### Example Reducer\n``` javascript\nexport default (state, action) =\u003e {\n  switch (action.type) {\n    case: 'MY_ACTION': {\n      const newState = // Perform what ever you need to do here to get your new state\n\n      action.addSideEffect((store) =\u003e {\n        // Your side effect goes here such as:\n        store.dispatch.newAction(action.myNewAction(store.getState().myData));\n      });\n\n      // Can add more side effects on action.addSideEffect\n\n      return newState;\n    }\n    default: {\n      return state\n    }\n  }\n}\n```\n\n### 3. (Optional) Get Information About Side Effects\nThe `addSideEffectMiddleware` adds a second new method on the redux reducer `action` called: `sideEffectInfo`.  \nThis method returns an object containing information about sideEffects:\n1. `count`: the current number of side effects that will be executed.  this may be useful for testing or other operations\n2. `options`: the original options passed into `addSideEffectMiddleware`. you may use this to look at the default `timeout` or to pass data from the middleware down to sideEffects\n\n## License\n`redux-reducer-side-effects` is licensed under the [MIT License](LICENSE).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanrigsby%2Fredux-reducer-side-effects","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdanrigsby%2Fredux-reducer-side-effects","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanrigsby%2Fredux-reducer-side-effects/lists"}