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+/*!
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+ * hoverIntent v1.10.2 // 2020.04.28 // jQuery v1.7.0+
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+ * http://briancherne.github.io/jquery-hoverIntent/
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+ *
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+ * You may use hoverIntent under the terms of the MIT license. Basically that
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+ * means you are free to use hoverIntent as long as this header is left intact.
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+ * Copyright 2007-2019 Brian Cherne
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+ */
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+
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+/**
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+ * hoverIntent is similar to jQuery's built-in "hover" method except that
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+ * instead of firing the handlerIn function immediately, hoverIntent checks
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+ * to see if the user's mouse has slowed down (beneath the sensitivity
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+ * threshold) before firing the event. The handlerOut function is only
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+ * called after a matching handlerIn.
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+ *
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+ * // basic usage ... just like .hover()
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+ * .hoverIntent( handlerIn, handlerOut )
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+ * .hoverIntent( handlerInOut )
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+ *
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+ * // basic usage ... with event delegation!
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+ * .hoverIntent( handlerIn, handlerOut, selector )
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+ * .hoverIntent( handlerInOut, selector )
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+ *
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+ * // using a basic configuration object
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+ * .hoverIntent( config )
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+ *
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+ * @param handlerIn function OR configuration object
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+ * @param handlerOut function OR selector for delegation OR undefined
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+ * @param selector selector OR undefined
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+ * @author Brian Cherne <brian(at)cherne(dot)net>
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+ */
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+
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+;(function(factory) {
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+ 'use strict';
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+ if (typeof define === 'function' && define.amd) {
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+ define(['jquery'], factory);
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+ } else if (typeof module === 'object' && module.exports) {
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+ module.exports = factory(require('jquery'));
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+ } else if (jQuery && !jQuery.fn.hoverIntent) {
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+ factory(jQuery);
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+ }
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+})(function($) {
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+ 'use strict';
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+
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+ // default configuration values
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+ var _cfg = {
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+ interval: 100,
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+ sensitivity: 6,
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+ timeout: 0
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+ };
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+
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+ // counter used to generate an ID for each instance
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+ var INSTANCE_COUNT = 0;
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+
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+ // current X and Y position of mouse, updated during mousemove tracking (shared across instances)
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+ var cX, cY;
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+
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+ // saves the current pointer position coordinates based on the given mousemove event
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+ var track = function(ev) {
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+ cX = ev.pageX;
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+ cY = ev.pageY;
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+ };
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+
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+ // compares current and previous mouse positions
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+ var compare = function(ev,$el,s,cfg) {
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+ // compare mouse positions to see if pointer has slowed enough to trigger `over` function
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+ if ( Math.sqrt( (s.pX-cX)*(s.pX-cX) + (s.pY-cY)*(s.pY-cY) ) < cfg.sensitivity ) {
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+ $el.off(s.event,track);
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+ delete s.timeoutId;
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+ // set hoverIntent state as active for this element (permits `out` handler to trigger)
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+ s.isActive = true;
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+ // overwrite old mouseenter event coordinates with most recent pointer position
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+ ev.pageX = cX; ev.pageY = cY;
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+ // clear coordinate data from state object
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+ delete s.pX; delete s.pY;
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+ return cfg.over.apply($el[0],[ev]);
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+ } else {
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+ // set previous coordinates for next comparison
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+ s.pX = cX; s.pY = cY;
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+ // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
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+ s.timeoutId = setTimeout( function(){compare(ev, $el, s, cfg);} , cfg.interval );
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+ }
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+ };
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+
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+ // triggers given `out` function at configured `timeout` after a mouseleave and clears state
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+ var delay = function(ev,$el,s,out) {
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+ var data = $el.data('hoverIntent');
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+ if (data) {
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+ delete data[s.id];
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+ }
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+ return out.apply($el[0],[ev]);
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+ };
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+
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+ // checks if `value` is a function
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+ var isFunction = function(value) {
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+ return typeof value === 'function';
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+ };
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+
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+ $.fn.hoverIntent = function(handlerIn,handlerOut,selector) {
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+ // instance ID, used as a key to store and retrieve state information on an element
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+ var instanceId = INSTANCE_COUNT++;
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+
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+ // extend the default configuration and parse parameters
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+ var cfg = $.extend({}, _cfg);
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+ if ( $.isPlainObject(handlerIn) ) {
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+ cfg = $.extend(cfg, handlerIn);
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+ if ( !isFunction(cfg.out) ) {
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+ cfg.out = cfg.over;
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+ }
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+ } else if ( isFunction(handlerOut) ) {
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+ cfg = $.extend(cfg, { over: handlerIn, out: handlerOut, selector: selector } );
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+ } else {
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+ cfg = $.extend(cfg, { over: handlerIn, out: handlerIn, selector: handlerOut } );
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+ }
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+
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+ // A private function for handling mouse 'hovering'
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+ var handleHover = function(e) {
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+ // cloned event to pass to handlers (copy required for event object to be passed in IE)
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+ var ev = $.extend({},e);
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+
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+ // the current target of the mouse event, wrapped in a jQuery object
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+ var $el = $(this);
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+
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+ // read hoverIntent data from element (or initialize if not present)
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+ var hoverIntentData = $el.data('hoverIntent');
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+ if (!hoverIntentData) { $el.data('hoverIntent', (hoverIntentData = {})); }
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+
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+ // read per-instance state from element (or initialize if not present)
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+ var state = hoverIntentData[instanceId];
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+ if (!state) { hoverIntentData[instanceId] = state = { id: instanceId }; }
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+
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+ // state properties:
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+ // id = instance ID, used to clean up data
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+ // timeoutId = timeout ID, reused for tracking mouse position and delaying "out" handler
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+ // isActive = plugin state, true after `over` is called just until `out` is called
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+ // pX, pY = previously-measured pointer coordinates, updated at each polling interval
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+ // event = string representing the namespaced event used for mouse tracking
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+
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+ // clear any existing timeout
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+ if (state.timeoutId) { state.timeoutId = clearTimeout(state.timeoutId); }
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+
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+ // namespaced event used to register and unregister mousemove tracking
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+ var mousemove = state.event = 'mousemove.hoverIntent.hoverIntent'+instanceId;
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+
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+ // handle the event, based on its type
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+ if (e.type === 'mouseenter') {
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+ // do nothing if already active
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+ if (state.isActive) { return; }
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+ // set "previous" X and Y position based on initial entry point
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+ state.pX = ev.pageX; state.pY = ev.pageY;
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+ // update "current" X and Y position based on mousemove
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+ $el.off(mousemove,track).on(mousemove,track);
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+ // start polling interval (self-calling timeout) to compare mouse coordinates over time
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+ state.timeoutId = setTimeout( function(){compare(ev,$el,state,cfg);} , cfg.interval );
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+ } else { // "mouseleave"
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+ // do nothing if not already active
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+ if (!state.isActive) { return; }
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+ // unbind expensive mousemove event
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+ $el.off(mousemove,track);
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+ // if hoverIntent state is true, then call the mouseOut function after the specified delay
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+ state.timeoutId = setTimeout( function(){delay(ev,$el,state,cfg.out);} , cfg.timeout );
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+ }
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+ };
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+
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+ // listen for mouseenter and mouseleave
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+ return this.on({'mouseenter.hoverIntent':handleHover,'mouseleave.hoverIntent':handleHover}, cfg.selector);
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+ };
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+});
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