35 lines
543 B
JavaScript
35 lines
543 B
JavaScript
import React from 'react'
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class Clock extends React.Component {
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constructor(props) {
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super(props)
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this.state = {
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time: new Date()
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}
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}
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componentDidMount() {
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console.log('mount')
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this.intervalId = setInterval(this.tick.bind(this), 1000);
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}
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componentWillUnmount() {
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console.log('unmount')
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clearInterval(this.intervalId);
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}
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render() {
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return (
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<div>Time: { this.state.time.toString() }</div>
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)
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}
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tick() {
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this.setState({ time: new Date() });
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}
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}
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export default Clock
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