15 lines
361 B
JavaScript
15 lines
361 B
JavaScript
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// @flow
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import { INCREMENT_COUNTER, DECREMENT_COUNTER } from '../actions/counter';
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import type { Action } from './types';
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export default function counter(state: number = 0, action: Action) {
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switch (action.type) {
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case INCREMENT_COUNTER:
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return state + 1;
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case DECREMENT_COUNTER:
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return state - 1;
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default:
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return state;
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}
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}
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