43 lines
1.2 KiB
TypeScript
43 lines
1.2 KiB
TypeScript
import { useReducer, useEffect } from 'react';
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import { reducer } from './reducer';
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export const Counter = () => {
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const [state, dispatch] = useReducer(reducer, { count: 0 });
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const unit = state.count === 1 ? 'day' : 'days';
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useEffect(() => {
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window.document.title = `${state.count} ${unit}`;
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}, [state.count]);
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return (
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<div className="space-y-8 rounded-md border border-slate-400 bg-white p-8 text-center shadow-lg">
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<div className="space-y-4">
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<div data-testid="counter-count" className="text-8xl font-semibold">
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{state.count}
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</div>
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<p>
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<span data-testid="counter-unit">{unit}</span> since the last
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JavaScript-related accident.
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</p>
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</div>
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<div className="flex gap-4">
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<button onClick={() => dispatch({ type: 'increment' })}>
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Increment
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</button>
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<button
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onClick={() => dispatch({ type: 'decrement' })}
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disabled={state.count === 0}
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>
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Decrement
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</button>
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<button
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onClick={() => dispatch({ type: 'reset' })}
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disabled={state.count === 0}
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>
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Reset
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</button>
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</div>
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</div>
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);
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};
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