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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.scrollPlugin = factory());
}(this, (function () { 'use strict';
function getEventTarget(event) {
try {
if (typeof event.composedPath === "function") {
var path = event.composedPath();
return path[0];
}
return event.target;
}
catch (error) {
return event.target;
}
}
if (typeof window.CustomEvent !== "function") {
var CustomEvent = function (typeArg, eventInitDict) {
eventInitDict = eventInitDict || {
bubbles: false,
cancelable: false,
detail: undefined,
};
var evt = document.createEvent("CustomEvent");
evt.initCustomEvent(typeArg, eventInitDict.bubbles, eventInitDict.cancelable, eventInitDict.detail);
return evt;
};
CustomEvent.prototype = window.Event.prototype;
window.CustomEvent = CustomEvent;
}
function delta(e) {
return Math.max(-1, Math.min(1, e.wheelDelta || -e.deltaY));
}
var scroll = function (e) {
e.preventDefault();
var ev = new CustomEvent("increment", {
bubbles: true,
});
ev.delta = delta(e);
getEventTarget(e).dispatchEvent(ev);
};
function scrollMonth(fp) {
return function (e) {
e.preventDefault();
var mDelta = delta(e);
fp.changeMonth(mDelta);
};
}
function scrollPlugin() {
return function (fp) {
var monthScroller = scrollMonth(fp);
return {
onReady: function () {
if (fp.timeContainer) {
fp.timeContainer.addEventListener("wheel", scroll);
}
if (fp.yearElements) {
fp.yearElements.forEach(function (yearElem) {
return yearElem.addEventListener("wheel", scroll);
});
}
if (fp.monthElements) {
fp.monthElements.forEach(function (monthElem) {
return monthElem.addEventListener("wheel", monthScroller);
});
}
fp.loadedPlugins.push("scroll");
},
onDestroy: function () {
if (fp.timeContainer) {
fp.timeContainer.removeEventListener("wheel", scroll);
}
if (fp.yearElements) {
fp.yearElements.forEach(function (yearElem) {
return yearElem.removeEventListener("wheel", scroll);
});
}
if (fp.monthElements) {
fp.monthElements.forEach(function (monthElem) {
return monthElem.removeEventListener("wheel", monthScroller);
});
}
},
};
};
}
return scrollPlugin;
})));