61 lines
2.8 KiB
JavaScript
61 lines
2.8 KiB
JavaScript
"use strict";
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'use client';
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = useScrollTrigger;
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var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
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var _objectWithoutPropertiesLoose2 = _interopRequireDefault(require("@babel/runtime/helpers/objectWithoutPropertiesLoose"));
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var React = _interopRequireWildcard(require("react"));
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const _excluded = ["getTrigger", "target"];
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function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
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function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
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function defaultTrigger(store, options) {
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const {
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disableHysteresis = false,
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threshold = 100,
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target
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} = options;
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const 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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const defaultTarget = typeof window !== 'undefined' ? window : null;
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function useScrollTrigger(options = {}) {
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const {
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getTrigger = defaultTrigger,
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target = defaultTarget
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} = options,
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other = (0, _objectWithoutPropertiesLoose2.default)(options, _excluded);
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const store = React.useRef();
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const [trigger, setTrigger] = React.useState(() => getTrigger(store, other));
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React.useEffect(() => {
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const handleScroll = () => {
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setTrigger(getTrigger(store, (0, _extends2.default)({
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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 () => {
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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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} |