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Functional React Article Snippet #1
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| //------------------Written as a class---------------------// | |
| class Farm extends React.Component { | |
| constructor(props) { | |
| super(props) | |
| this.state = { | |
| tools: ["hammer", "scythe", "sickle"] | |
| } | |
| } | |
| componentDidMount() { | |
| fetch("/tools") | |
| .then(({ body: { tools } }) => this.setState(tools)) | |
| .catch(err => | |
| console.log("Oh no, your tools got lost. Here's why: ", err) | |
| ) | |
| } | |
| shouldComponentUpdate(nextProps, nextState) { | |
| return nextState.tools !== this.state.tools | |
| } | |
| render() { | |
| const { tools } = this.state | |
| const { someProp, anotherProp } = this.props | |
| if (!(tools && tools.length)) { | |
| return null | |
| } | |
| return ( | |
| <div> | |
| Here are all the tools in the farm: | |
| <ul> | |
| {tools.map((tool, index) => ( | |
| <li key={index}> {tool} </li> | |
| ))} | |
| </ul> | |
| {someProp} - {anotherProp} | |
| </div> | |
| ) | |
| } | |
| } |
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