40 lines
914 B
TypeScript
40 lines
914 B
TypeScript
import * as React from 'react';
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import * as ReactDOM from 'react-dom';
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import {observable} from 'mobx';
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import {observer} from 'mobx-react';
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import DevTools from 'mobx-react-devtools';
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class AppState {
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@observable timer = 0;
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constructor() {
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setInterval(() => {
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this.timer += 1;
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}, 1000);
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}
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resetTimer() {
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this.timer = 0;
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}
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}
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@observer
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class TimerView extends React.Component<{appState: AppState}, {}> {
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render() {
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return (
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<div>
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<button onClick={this.onReset}>
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Seconds passed: {this.props.appState.timer}
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</button>
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<DevTools />
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</div>
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);
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}
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onReset = () => {
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this.props.appState.resetTimer();
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}
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};
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const appState = new AppState();
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ReactDOM.render(<TimerView appState={appState} />, document.getElementById('root'));
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