35 lines
889 B
JavaScript
35 lines
889 B
JavaScript
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const xtend = require('xtend')
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const raf = require('raf')
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module.exports = {
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state: {
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elapsed: 0,
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startTime: 0,
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start: false,
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laps: []
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},
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reducers: {
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start: (data, state) => xtend(state, { start: true, startTime: Date.now() - state.elapsed }),
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stop: (data, state) => xtend(state, { start: false }),
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update: (data, state) => xtend(state, { elapsed: data }),
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reset: (data, state) => xtend(state, { startTime: Date.now(), elapsed: 0, laps: [] }),
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add: (data, state) => xtend(state, { laps: state.laps.concat(data) })
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},
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effects: {
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now: (data, state, send, done) => {
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if (state.start) {
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let elapsed = data - state.startTime
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send('update', elapsed, done)
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}
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}
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},
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subscriptions: [
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(send, done) => {
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raf(function loop () {
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send('now', Date.now(), done)
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raf(loop)
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})
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}
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]
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}
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