30 lines
913 B
JavaScript
30 lines
913 B
JavaScript
// Utilities
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import { onBeforeUnmount, ref, shallowRef, watch } from 'vue';
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import { SUPPORTS_INTERSECTION } from "../util/index.mjs";
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export function useIntersectionObserver(callback, options) {
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const intersectionRef = ref();
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const isIntersecting = shallowRef(false);
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if (SUPPORTS_INTERSECTION) {
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const observer = new IntersectionObserver(entries => {
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callback?.(entries, observer);
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isIntersecting.value = !!entries.find(entry => entry.isIntersecting);
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}, options);
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onBeforeUnmount(() => {
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observer.disconnect();
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});
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watch(intersectionRef, (newValue, oldValue) => {
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if (oldValue) {
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observer.unobserve(oldValue);
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isIntersecting.value = false;
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}
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if (newValue) observer.observe(newValue);
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}, {
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flush: 'post'
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});
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}
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return {
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intersectionRef,
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isIntersecting
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};
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}
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//# sourceMappingURL=intersectionObserver.mjs.map
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