57 lines
2.2 KiB
JavaScript
57 lines
2.2 KiB
JavaScript
'use client';
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import _extends from "@babel/runtime/helpers/esm/extends";
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import _objectWithoutProperties from "@babel/runtime/helpers/esm/objectWithoutProperties";
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import * as React from 'react';
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function defaultTrigger(store, options) {
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var _options$disableHyste = options.disableHysteresis,
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disableHysteresis = _options$disableHyste === void 0 ? false : _options$disableHyste,
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_options$threshold = options.threshold,
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threshold = _options$threshold === void 0 ? 100 : _options$threshold,
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target = options.target;
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var previous = store.current;
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if (target) {
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// Get vertical scroll
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store.current = target.pageYOffset !== undefined ? target.pageYOffset : target.scrollTop;
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}
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if (!disableHysteresis && previous !== undefined) {
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if (store.current < previous) {
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return false;
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}
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}
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return store.current > threshold;
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}
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var defaultTarget = typeof window !== 'undefined' ? window : null;
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export default function useScrollTrigger() {
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var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
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var _options$getTrigger = options.getTrigger,
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getTrigger = _options$getTrigger === void 0 ? defaultTrigger : _options$getTrigger,
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_options$target = options.target,
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target = _options$target === void 0 ? defaultTarget : _options$target,
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other = _objectWithoutProperties(options, ["getTrigger", "target"]);
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var store = React.useRef();
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var _React$useState = React.useState(function () {
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return getTrigger(store, other);
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}),
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trigger = _React$useState[0],
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setTrigger = _React$useState[1];
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React.useEffect(function () {
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var handleScroll = function handleScroll() {
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setTrigger(getTrigger(store, _extends({
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target: target
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}, other)));
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};
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handleScroll(); // Re-evaluate trigger when dependencies change
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target.addEventListener('scroll', handleScroll, {
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passive: true
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});
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return function () {
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target.removeEventListener('scroll', handleScroll, {
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passive: true
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});
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};
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// See Option 3. https://github.com/facebook/react/issues/14476#issuecomment-471199055
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [target, getTrigger, JSON.stringify(other)]);
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return trigger;
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} |