75 lines
1.4 KiB
Vue
75 lines
1.4 KiB
Vue
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<template>
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<div ref="rootEl">
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<slot name="header"></slot>
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<div ref="bodyEl">
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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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import { defineComponent, onMounted, onUnmounted, ref } from 'vue';
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export default defineComponent({
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props: {
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autoSticky: {
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type: Boolean,
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required: false,
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default: false,
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},
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},
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setup(props, context) {
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const rootEl = ref<HTMLElement>(null);
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const bodyEl = ref<HTMLElement>(null);
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const calc = () => {
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const currentStickyTop = getComputedStyle(rootEl.value).getPropertyValue('--stickyTop') || '0px';
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const header = rootEl.value.children[0];
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if (header === bodyEl.value) {
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bodyEl.value.style.setProperty('--stickyTop', currentStickyTop);
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} else {
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bodyEl.value.style.setProperty('--stickyTop', `calc(${currentStickyTop} + ${header.offsetHeight}px)`);
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if (props.autoSticky) {
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header.style.setProperty('--stickyTop', currentStickyTop);
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header.style.position = 'sticky';
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header.style.top = 'var(--stickyTop)';
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header.style.zIndex = '1';
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}
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}
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};
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onMounted(() => {
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calc();
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const observer = new MutationObserver(() => {
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setTimeout(() => {
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calc();
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}, 100);
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});
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observer.observe(rootEl.value, {
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attributes: false,
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childList: true,
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subtree: false,
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});
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onUnmounted(() => {
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observer.disconnect();
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});
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});
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return {
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rootEl,
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bodyEl,
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};
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},
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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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