{"id":19472099,"url":"https://github.com/pakholeung37/create-context-helper","last_synced_at":"2026-05-19T14:39:10.127Z","repository":{"id":57678126,"uuid":"490680440","full_name":"pakholeung37/create-context-helper","owner":"pakholeung37","description":"Create react context especially atomic context without painless.","archived":false,"fork":false,"pushed_at":"2022-08-31T03:30:52.000Z","size":36,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-06-01T02:14:26.834Z","etag":null,"topics":["react","react-context","react-hooks","reactjs","state-management"],"latest_commit_sha":null,"homepage":"","language":"TypeScript","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/pakholeung37.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}},"created_at":"2022-05-10T12:10:04.000Z","updated_at":"2023-03-07T09:42:05.000Z","dependencies_parsed_at":"2022-09-01T10:11:52.572Z","dependency_job_id":null,"html_url":"https://github.com/pakholeung37/create-context-helper","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/pakholeung37/create-context-helper","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pakholeung37%2Fcreate-context-helper","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pakholeung37%2Fcreate-context-helper/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pakholeung37%2Fcreate-context-helper/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pakholeung37%2Fcreate-context-helper/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/pakholeung37","download_url":"https://codeload.github.com/pakholeung37/create-context-helper/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/pakholeung37%2Fcreate-context-helper/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":263440960,"owners_count":23467018,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","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":["react","react-context","react-hooks","reactjs","state-management"],"created_at":"2024-11-10T19:12:29.690Z","updated_at":"2026-05-19T14:39:05.073Z","avatar_url":"https://github.com/pakholeung37.png","language":"TypeScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Create Context Helper\n\nCreate react context especially atomic context without painless.\n\nWith Atomic Context your component will only re-render based on atomic value changes but not the whole value you provide in a common pattern. It's simple to use and more powerful. [check](#createAtomicContextHelper)\n\n[![NPM](https://nodei.co/npm/create-context-helper.png)](https://npmjs.org/package/create-context-helper/)\n\n## Install\n\n```bash\n$ yarn add create-context-helper\n# or\n$ npm i create-context-helper\n```\n\n## Usage\n\nThis library provide `createContextHelper` to create a common pattern Context And `createAtomicContextHelper` to create atomic Context.\n\n### createContextHelper\n\n```typescript\nimport { createContextHelper } from 'create-context-helper'\n\nconst [FooBarProvider, useFooBar] = createContextHelper\u003c{\n  foo: string\n  bar: string\n}\u003e('FooBar', {\n  foo: '',\n  bar: '',\n})\n\nconst App = () =\u003e {\n  return (\n    \u003cFooBarProvider foo={'hello'} bar={'world'}\u003e\n      \u003cComp /\u003e\n    \u003c/FooBarProvider\u003e\n  )\n}\n\nconst Comp = () =\u003e {\n  const { foo, bar } = useFoo()\n  return (\n    \u003cdiv\u003e\n      {foo} {bar} // hello world\n    \u003c/div\u003e\n  )\n}\n```\n\n### createAtomicContextHelper\n\n```typescript\nimport { createAtomicContextHelper } from 'create-context-helper'\n\nconst [FooBarProvider, useFooBar] = createAtomicContextHelper\u003c{\n  foo: string\n  bar: string\n}\u003e('FooBar', {\n  foo: '',\n  bar: '',\n})\n\nconst App = () =\u003e {\n  return (\n    \u003cFooBarProvider foo={'hello'} bar={'world'}\u003e\n      \u003cComp /\u003e\n    \u003c/FooBarProvider\u003e\n  )\n}\n\nconst Comp = () =\u003e {\n  const { foo } = useFooBar(['foo'])\n  return \u003cdiv\u003e{foo} // hello\u003c/div\u003e\n}\n```\n\nSimple as `createContextHelper`, but more powerful. Your context now becomes atomic which means now taking `useFoo(['foo'])` for value `foo`, the component will only change when `foo` changes.\n\n`createAtomicContextHelper` will generate a provider tree for you like this\n\n```typescript\n\u003cFooBarProvider\u003e\n  \u003cFooBar.foo.Provider\u003e\n    \u003cFooBar.bar.Provider\u003e\n      \u003cComp /\u003e\n    \u003c/FooBar.bar.Provider\u003e\n  \u003c/FooBar.foo.Provider\u003e\n\u003c/FooBarProvider\u003e\n```\n\nAnd with selector `['foo']` in hook `useFooBar`, the `FooBarProvider` will only collects `FooBar.foo.Context` for you. which means `\u003cComp /\u003e` only re-render when `foo` changes.\n\n## Reference\n\n```typescript\nexport const createContextHelper = \u003c\n  ContextType,\n  ProviderProps extends Partial\u003cContextType\u003e = Partial\u003cContextType\u003e,\n\u003e(\n  // prefix for provider displayName\n  prefix: string,\n  // context defaultValue\n  defaultValue: ContextType,\n): [\n  // provider\n  React.FC\u003cProviderProps\u003e,\n  // use hook\n  () =\u003e ContextType,\n  // context\n  React.Context\u003cContextType\u003e\n]\n\nexport const createAtomicContextHelper = \u003c\n  ContextType extends { [s: string]: any },\n  ProviderProps extends Partial\u003cContextType\u003e = Partial\u003cContextType\u003e,\n  K extends keyof ContextType = keyof ContextType,\n\u003e(\n  // prefix for provider displayName\n  prefix: string,\n  // context defaultValue\n  defaultValue: ContextType,\n): [\n  // provider\n  React.FC\u003cProviderProps\u003e,\n  // use hook\n  \u003cT extends K[] = K[]\u003e(selector?: T) =\u003e Pick\u003cContextType, T[number]\u003e,\n  // contextMap\n  Record\u003ckeyof ContextType, React.Context\u003cContextType[string]\u003e\u003e,\n]\n\n```\n\n## Limitation\n\nThere is no magic in `createAtomicContextHelper`, It only separates shallow values in the original Provider into smaller providers. Inside `createAtomicContextHelper`, it calls `useContext` conditional depends on selector. So dynamic selector is not allowed. if don't, it will cause a serious render problem(`createAtomicContextHelper` handles this scenario by using the first selector).\n\n## License\n\n[MIT](LICENSE)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpakholeung37%2Fcreate-context-helper","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fpakholeung37%2Fcreate-context-helper","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpakholeung37%2Fcreate-context-helper/lists"}