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Functional React Article Snippet #2
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| import branch from 'recompose/branch' | |
| import withState from 'recompose/withState' | |
| import renderNothing from 'recompose/renderNothing' | |
| import onlyUpdateForKeys from 'recompose/onlyUpdateForKeys' | |
| import lifecycle from 'out-of-scope-for-this-article-but-serves-same-purpose-as-recompose-lifecycle' | |
| // And now the exact same thing, written functionally. | |
| //---------------------------------------------------------------// | |
| // Only the 'view' logic. | |
| const BaseFarm = ({ someProp, anotherProp, tools }) => ( | |
| <div> | |
| Here are all the tools in the farm: | |
| <ul> | |
| {tools.map((tool, index) => ( | |
| <li key={index}> {tool} </li> | |
| ))} | |
| </ul> | |
| {someProp} - {anotherProp} | |
| </div> | |
| ) | |
| // All the 'other' stuff. | |
| const didMount = ({ setTools }) => | |
| fetch("/tools") | |
| .then(({ body: { tools } }) => setTools(tools)) | |
| .catch(err => console.log("Oh no, your tools got lost. Here's why: ", err)) | |
| const shouldNotRender = ({ tools }) => !(tools && tools.length) | |
| const Farm = withState("tools", "setTools", ["hammer", "scythe", "sickle"])( | |
| // N.B: lifecycle isn't the one from recompose | |
| lifecycle({ didMount })( | |
| branch(shouldNotRender, renderNothing)( | |
| onlyUpdateForKeys(["tools"])(BaseFarm) | |
| ) | |
| ) | |
| ) |
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