55 lines
3.0 KiB
JavaScript
55 lines
3.0 KiB
JavaScript
import {getScrollParent as $62d8ded9296f3872$export$cfa2225e87938781} from "./getScrollParent.module.js";
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import {useEffectEvent as $8ae05eaa5c114e9c$export$7f54fc3180508a52} from "./useEffectEvent.module.js";
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import {useLayoutEffect as $f0a04ccd8dbdd83b$export$e5c5a5f917a5871c} from "./useLayoutEffect.module.js";
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import {useRef as $7FoZl$useRef} from "react";
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/*
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* Copyright 2024 Adobe. All rights reserved.
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* This file is licensed to you under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License. You may obtain a copy
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* of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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* OF ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*/
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function $a5fa973c1850dd36$export$ccaea96c28e8b9e7(props, ref) {
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let { collection: collection, onLoadMore: onLoadMore, scrollOffset: scrollOffset = 1 } = props;
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let sentinelObserver = (0, $7FoZl$useRef)(null);
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let triggerLoadMore = (0, $8ae05eaa5c114e9c$export$7f54fc3180508a52)((entries)=>{
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// Use "isIntersecting" over an equality check of 0 since it seems like there is cases where
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// a intersection ratio of 0 can be reported when isIntersecting is actually true
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for (let entry of entries)// Note that this will be called if the collection changes, even if onLoadMore was already called and is being processed.
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// Up to user discretion as to how to handle these multiple onLoadMore calls
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if (entry.isIntersecting && onLoadMore) onLoadMore();
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});
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(0, $f0a04ccd8dbdd83b$export$e5c5a5f917a5871c)(()=>{
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if (ref.current) {
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// Tear down and set up a new IntersectionObserver when the collection changes so that we can properly trigger additional loadMores if there is room for more items
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// Need to do this tear down and set up since using a large rootMargin will mean the observer's callback isn't called even when scrolling the item into view beause its visibility hasn't actually changed
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// https://codesandbox.io/p/sandbox/magical-swanson-dhgp89?file=%2Fsrc%2FApp.js%3A21%2C21
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sentinelObserver.current = new IntersectionObserver(triggerLoadMore, {
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root: (0, $62d8ded9296f3872$export$cfa2225e87938781)(ref === null || ref === void 0 ? void 0 : ref.current),
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rootMargin: `0px ${100 * scrollOffset}% ${100 * scrollOffset}% ${100 * scrollOffset}%`
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});
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sentinelObserver.current.observe(ref.current);
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}
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return ()=>{
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if (sentinelObserver.current) sentinelObserver.current.disconnect();
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};
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}, [
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collection,
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triggerLoadMore,
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ref,
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scrollOffset
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]);
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}
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export {$a5fa973c1850dd36$export$ccaea96c28e8b9e7 as useLoadMoreSentinel};
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//# sourceMappingURL=useLoadMoreSentinel.module.js.map
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