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refactor(chronometer): improved chronometer precision

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This commit is contained in:
Corentin Thomasset
2022-08-04 09:06:42 +02:00
parent fda0b0ca25
commit e48d60b1ed
3 changed files with 37 additions and 17 deletions
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9
src/tools/chronometer/chronometer.service.test.ts
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@@ -1,12 +1,13 @@
import { describe, expect, it } from 'vitest';
import { formatChronometerTime } from './chronometer.service';
import { formatMs } from './chronometer.service';
describe('chronometer', () => {
describe('formatChronometerTime', () => {
it('format the elapsed time', () => {
expect(formatChronometerTime({ elapsed: 123456 })).toEqual('02:03.456');
expect(formatChronometerTime({ elapsed: 123456, msPerUnit: 100 })).toEqual('03:25:45.600');
expect(formatChronometerTime({ elapsed: 12345600 })).toEqual('03:25:45.600');
expect(formatMs(0)).toEqual('00:00.000');
expect(formatMs(1)).toEqual('00:00.001');
expect(formatMs(123456)).toEqual('02:03.456');
expect(formatMs(12345600)).toEqual('03:25:45.600');
});
});
});

12
src/tools/chronometer/chronometer.service.ts
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@@ -1,10 +1,8 @@
export function formatChronometerTime({ elapsed, msPerUnit = 1 }: { elapsed: number; msPerUnit?: number }) {
const elapsedMs = elapsed * msPerUnit;
const ms = elapsedMs % 1000;
const secs = ((elapsedMs - ms) / 1000) % 60;
const mins = (((elapsedMs - ms) / 1000 - secs) / 60) % 60;
const hrs = (((elapsedMs - ms) / 1000 - secs) / 60 - mins) / 60;
export function formatMs(msTotal: number) {
const ms = msTotal % 1000;
const secs = ((msTotal - ms) / 1000) % 60;
const mins = (((msTotal - ms) / 1000 - secs) / 60) % 60;
const hrs = (((msTotal - ms) / 1000 - secs) / 60 - mins) / 60;
const hrsString = hrs > 0 ? `${hrs.toString().padStart(2, '0')}:` : '';
return `${hrsString}${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}.${ms

33
src/tools/chronometer/chronometer.vue
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@@ -1,11 +1,11 @@
<template>
<div>
<n-card>
<div class="duration">{{ formatChronometerTime({ elapsed: counter, msPerUnit }) }}</div>
<div class="duration">{{ formatMs(counter) }}</div>
</n-card>
<br />
<n-space justify="center">
<n-button v-if="!isActive" secondary type="primary" @click="resume">Start</n-button>
<n-button v-if="!isRunning" secondary type="primary" @click="resume">Start</n-button>
<n-button v-else secondary type="warning" @click="pause">Stop</n-button>
<n-button secondary @click="counter = 0">Reset</n-button>
@@ -14,12 +14,33 @@
</template>
<script setup lang="ts">
import { useInterval } from '@vueuse/core';
import { formatChronometerTime } from './chronometer.service';
import { useRafFn } from '@vueuse/core';
import { ref } from 'vue';
import { formatMs } from './chronometer.service';
const msPerUnit = 10;
const isRunning = ref(false);
const counter = ref(0);
const { counter, pause, resume, isActive } = useInterval(msPerUnit, { controls: true, immediate: false });
let previousRafDate = Date.now();
const { pause: pauseRaf, resume: resumeRaf } = useRafFn(
() => {
const deltaMs = Date.now() - previousRafDate;
previousRafDate = Date.now();
counter.value += deltaMs;
},
{ immediate: false },
);
function resume() {
previousRafDate = Date.now();
resumeRaf();
isRunning.value = true;
}
function pause() {
pauseRaf();
isRunning.value = false;
}
</script>
<style lang="less" scoped>