Created
October 26, 2017 14:55
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Example Counter Component in React
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class Button extends React.Component { | |
handleClick = () => { | |
this.props.onClickFn(this.props.incrementValue) | |
} | |
render() { | |
return ( | |
<button onClick={this.handleClick}> | |
+{this.props.incrementValue} | |
</button> | |
) | |
} | |
} | |
const Result = (props) => { | |
return ( | |
<div>{props.counter}</div> | |
) | |
} | |
class App extends React.Component { | |
state = {counter: 0} | |
incrementCounter = (incrementValue) => { | |
this.setState((prevState) => ({ | |
counter: this.state.counter + incrementValue | |
})); | |
} | |
render() { | |
return ( | |
<div> | |
<Button onClickFn={this.incrementCounter} incrementValue={1}/> | |
<Button onClickFn={this.incrementCounter} incrementValue={5}/> | |
<Button onClickFn={this.incrementCounter} incrementValue={10}/> | |
<Button onClickFn={this.incrementCounter} incrementValue={100}/> | |
<Result counter={this.state.counter}/> | |
</div> | |
) | |
} | |
} | |
ReactDOM.render(<App />, mountNode); |
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