67 lines
1.4 KiB
Vue
67 lines
1.4 KiB
Vue
<template>
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<div ref="rootEl">
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<div ref="headerEl">
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<slot name="header"></slot>
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</div>
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<div ref="bodyEl" :data-sticky-container-header-height="headerHeight">
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<slot></slot>
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</div>
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</div>
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</template>
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<script lang="ts">
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// なんか動かない
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//const CURRENT_STICKY_TOP = Symbol('CURRENT_STICKY_TOP');
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const CURRENT_STICKY_TOP = 'CURRENT_STICKY_TOP';
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</script>
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<script lang="ts" setup>
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import { onMounted, onUnmounted, provide, inject, Ref, ref, watch } from 'vue';
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const rootEl = $shallowRef<HTMLElement>();
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const headerEl = $shallowRef<HTMLElement>();
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const bodyEl = $shallowRef<HTMLElement>();
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let headerHeight = $ref<string | undefined>();
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let childStickyTop = $ref(0);
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const parentStickyTop = inject<Ref<number>>(CURRENT_STICKY_TOP, ref(0));
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provide(CURRENT_STICKY_TOP, $$(childStickyTop));
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const calc = () => {
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childStickyTop = parentStickyTop.value + headerEl.offsetHeight;
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headerHeight = headerEl.offsetHeight.toString();
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};
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const observer = new ResizeObserver(() => {
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window.setTimeout(() => {
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calc();
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}, 100);
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});
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onMounted(() => {
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calc();
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watch(parentStickyTop, calc);
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watch($$(childStickyTop), () => {
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bodyEl.style.setProperty('--stickyTop', `${childStickyTop}px`);
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}, {
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immediate: true,
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});
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headerEl.style.position = 'sticky';
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headerEl.style.top = 'var(--stickyTop, 0)';
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headerEl.style.zIndex = '1000';
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observer.observe(headerEl);
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});
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onUnmounted(() => {
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observer.disconnect();
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});
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</script>
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<style lang="scss" module>
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</style>
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