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Mounting test
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| import React, { Component } from 'react'; | |
| class MountingTest extends Component { | |
| componentDidMount() { | |
| console.warn('mount', this.props.name); | |
| } | |
| componentWillUnmount() { | |
| console.warn('unmount', this.props.name); | |
| } | |
| render() { | |
| return <div>{this.props.name}</div>; | |
| } | |
| } | |
| class App extends Component { | |
| state = { | |
| month: 1, | |
| } | |
| render() { | |
| return ( | |
| <div> | |
| <div> | |
| <button onClick={() => this.setState(({month}) => ({month: month+1}))}> | |
| + Month {this.state.month} | |
| </button> | |
| </div> | |
| {(this.state.month % 2) && | |
| <MountingTest name="foo" /> | |
| } | |
| {!(this.state.month % 2) && | |
| <MountingTest name="bar" /> | |
| } | |
| {(this.state.month % 2) ? | |
| <MountingTest name="dog" /> : | |
| <MountingTest name="cat" /> | |
| } | |
| </div> | |
| ); | |
| } | |
| } | |
| export default App; |
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