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CSS hex color codes\")\n\nRetainer (_React_ + _container_) is a small tool to compose [render prop components](https://reactjs.org/docs/render-props.html).\n\n# Installation\n\n```\nyarn add @danwang/retainer\n```\n\n# Usage\n\nA `Consumer\u003cT\u003e` is a React component that accepts a single prop `children` of\ntype `(T) =\u003e ReactNode`.\n\nA `Retainer\u003cT\u003e` is a container wrapping a `Consumer\u003cT\u003e` with methods for\ntransforming the provided values.\n\nA typical flow looks like:\n\n1.  Put the component in a `Retainer`\n2.  Transform the `Retainer`\n3.  Extract a component or ReactElement from the `Retainer`\n\n# Example\n\nUsing the context API (React 16.3+):\n\n```jsx\nimport * as Retainer from \"@danwang/retainer\";\n\nconst Context = React.createContext({\n  value: 0,\n  setValue: () =\u003e () =\u003e {}\n});\n\nclass App extends React.Component {\n  state = { value: 0 };\n  handleSetValue = (value: number) =\u003e () =\u003e this.setState({ value });\n  render() {\n    const context = {\n      value: this.state.value,\n      setValue: this.handleSetValue\n    };\n    return (\n      \u003cContext.Provider value={context}\u003e\n        \u003cRoot /\u003e\n      \u003c/Context.Provider\u003e\n    );\n  }\n}\n\nconst Root = () =\u003e\n  Retainer.make(Context.Consumer)\n    .map(context =\u003e (\n      \u003cdiv\u003e\n        Count is {context.value}\n        \u003cbutton onClick={context.setValue(context.value + 1)}\u003e+\u003c/button\u003e\n      \u003c/div\u003e\n    ))\n    .toReactElement();\n\nReactDOM.render(\u003cApp /\u003e, element);\n```\n\n# API\n\n## Creation\n\n### `Retainer.make: \u003cT\u003e(component: Consumer\u003cT\u003e) =\u003e Retainer\u003cT\u003e`\n\nCreates a `Retainer` containing the component.\n\n## Transformation\n\n### `Retainer\u003cT\u003e.map: \u003cU\u003e(mapper: (T) =\u003e U) =\u003e Retainer\u003cU\u003e`\n\nApplies a function to the provided value of the interior component.\n\n### `Retainer\u003cT\u003e.flatMap: \u003cU\u003e(mapper: (T) =\u003e Retainer\u003cU\u003e) =\u003e Retainer\u003cU\u003e`\n\nApplies a function returning a `Retainer` to the provided value of the interior\ncomponent, flattening one level of nested `Retainer`s.\n\n## Extraction\n\n### `Retainer\u003cT\u003e.toComponent: () =\u003e Consumer\u003cT\u003e`\n\nReturns a render prop component that provides the interior value.\n\n### `Retainer\u003cReactElement\u003e.toReactElement: () =\u003e ReactElement`\n\nIf the interior type is a `ReactElement`, returns a `ReactElement` which, when\nmounted, mounts necessary `Consumer` components to render the interior value.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanwang%2Fretainer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdanwang%2Fretainer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanwang%2Fretainer/lists"}