Files
vite_front/hwe/ts/components/SimpleClock.vue
T
2022-07-08 00:11:41 +09:00

47 lines
1.0 KiB
Vue

<template>
<span class="time-zone">{{ serverNow }}</span>
</template>
<script lang="ts" setup>
import { addMilliseconds } from "date-fns";
import { type PropType, ref, onMounted, watch } from "vue";
import { formatTime } from "@/util/formatTime";
const props = defineProps({
serverTime: {
type: Object as PropType<Date>,
required: false,
default: new Date(),
},
timeFormat: {
type: String,
required: false,
default: "HH:mm:ss",
},
});
const timeDiff = ref(0);
const serverNow = ref("");
watch(
() => props.serverTime,
(newValue) => {
const clientNow = new Date();
timeDiff.value = newValue.getTime() - clientNow.getTime();
}
);
function updateNow() {
const serverNowObj = addMilliseconds(new Date(), timeDiff.value);
serverNow.value = formatTime(serverNowObj, props.timeFormat);
setTimeout(() => {
updateNow();
}, 1000 - serverNowObj.getMilliseconds());
}
onMounted(() => {
const clientNow = new Date();
timeDiff.value = props.serverTime.getTime() - clientNow.getTime();
updateNow();
});
</script>