40 lines
823 B
JavaScript
40 lines
823 B
JavaScript
import React from 'react'
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import { useSelector, shallowEqual } from 'react-redux'
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const useClock = () => {
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return useSelector(
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state => ({
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lastUpdate: state.lastUpdate,
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light: state.light
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}),
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shallowEqual
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)
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}
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const formatTime = time => {
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// cut off except hh:mm:ss
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return new Date(time).toJSON().slice(11, 19)
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}
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const Clock = () => {
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const { lastUpdate, light } = useClock()
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return (
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<div className={light ? 'light' : ''}>
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{formatTime(lastUpdate)}
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<style jsx>{`
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div {
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padding: 15px;
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display: inline-block;
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color: #82fa58;
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font: 50px menlo, monaco, monospace;
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background-color: #000;
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}
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.light {
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background-color: #999;
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}
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`}</style>
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</div>
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)
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}
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export default Clock
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