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52 lines
1.2 KiB
52 lines
1.2 KiB
<template>
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<div ref="scrollContainer">
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<slot />
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<div ref="sentinel" style="height: 1px"></div>
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</div>
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</template>
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<script lang="ts">
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import { Component, Emit, Prop, Vue } from "vue-facing-decorator";
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@Component
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export default class InfiniteScroll extends Vue {
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@Prop({ default: 200 })
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readonly distance!: number;
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private observer!: IntersectionObserver;
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private isInitialRender = true;
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updated() {
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if (!this.observer) {
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const options = {
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root: null,
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rootMargin: `0px 0px ${this.distance}px 0px`,
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threshold: 1.0,
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};
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this.observer = new IntersectionObserver(
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this.handleIntersection,
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options,
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);
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this.observer.observe(this.$refs.sentinel as HTMLElement);
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}
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}
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// 'beforeUnmount' hook runs before unmounting the component
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beforeUnmount() {
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if (this.observer) {
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this.observer.disconnect();
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}
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}
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@Emit("reached-bottom")
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handleIntersection(entries: IntersectionObserverEntry[]) {
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const entry = entries[0];
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if (entry.isIntersecting) {
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return true;
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}
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return false;
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}
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}
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</script>
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<!-- Add "scoped" attribute to limit CSS to this component only -->
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<style scoped></style>
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