43 lines
931 B
Vue
43 lines
931 B
Vue
<!--
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SPDX-FileCopyrightText: syuilo and misskey-project
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SPDX-License-Identifier: AGPL-3.0-only
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-->
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<template>
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<span>{{ number(Math.floor(tweened.number)) }}</span>
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</template>
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<script lang="ts" setup>
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import { reactive, watch } from 'vue';
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import number from '@/filters/number.js';
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const props = defineProps<{
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value: number;
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}>();
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const tweened = reactive({
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number: 0,
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});
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watch(() => props.value, (to, from) => {
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// requestAnimationFrameを利用して、500msでfromからtoまでを1次関数的に変化させる
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let start: number | null = null;
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function step(timestamp: number) {
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if (start === null) {
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start = timestamp;
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}
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const elapsed = timestamp - start;
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tweened.number = (from ?? 0) + (to - (from ?? 0)) * elapsed / 500;
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if (elapsed < 500) {
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window.requestAnimationFrame(step);
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} else {
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tweened.number = to;
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}
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}
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window.requestAnimationFrame(step);
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}, {
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immediate: true,
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});
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</script>
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