forked from mirrors/firefish
70 lines
1.5 KiB
Vue
70 lines
1.5 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 type { Ref } from "vue";
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import { inject, onMounted, onUnmounted, provide, ref, watch } from "vue";
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const rootEl = $ref<HTMLElement>();
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const headerEl = $ref<HTMLElement>();
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const bodyEl = $ref<HTMLElement>();
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let headerHeight = $ref<string | undefined>(),
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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, $$(childStickyTop));
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const calc = () => {
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childStickyTop = parentStickyTop.value + headerEl.offsetHeight;
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headerHeight = headerEl.offsetHeight.toString();
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};
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const observer = new ResizeObserver(() => {
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window.setTimeout(() => {
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calc();
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}, 100);
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});
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onMounted(() => {
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calc();
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watch(parentStickyTop, calc);
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watch(
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$$(childStickyTop),
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() => {
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bodyEl.style.setProperty("--stickyTop", `${childStickyTop}px`);
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},
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{
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immediate: true,
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},
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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></style>
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