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- 3) {
fieldsArray.scroll_timing = timing
MonsterInsightsObject.sendEvent('event', 'scroll_depth', fieldsArray);
} else {
MonsterInsightsObject.sendEvent('event', 'scroll_depth', fieldsArray);
}
}
function calculateMarks(docHeight) {
return {
'25%' : parseInt(docHeight * 0.25, 10),
'50%' : parseInt(docHeight * 0.50, 10),
'75%' : parseInt(docHeight * 0.75, 10),
/* Cushion to trigger 100% event in iOS */
'100%': docHeight - 5
};
}
function checkMarks(marks, scrollDistance, timing) {
/* Check each active mark */
$.each(marks, function(key, val) {
if ( $.inArray(key, cache) === -1 && scrollDistance >= val ) {
sendEvent('Percentage', key, scrollDistance, timing);
cache.push(key);
}
});
}
function rounded(scrollDistance) {
/* Returns String */
return (Math.floor(scrollDistance/250) * 250).toString();
}
function init() {
bindScrollDepth();
}
/*
* Public Methods
*/
/* Reset Scroll Depth with the originally initialized options */
$.scrollDepth.reset = function() {
cache = [];
lastPixelDepth = 0;
$window.off('scroll.scrollDepth');
bindScrollDepth();
};
/* Add DOM elements to be tracked */
$.scrollDepth.addElements = function(elems) {
if (typeof elems == "undefined" || !$.isArray(elems)) {
return;
}
$.merge(options.elements, elems);
/* If scroll event has been unbound from window, rebind */
if (!scrollEventBound) {
bindScrollDepth();
}
};
/* Remove DOM elements currently tracked */
$.scrollDepth.removeElements = function(elems) {
if (typeof elems == "undefined" || !$.isArray(elems)) {
return;
}
$.each(elems, function(index, elem) {
var inElementsArray = $.inArray(elem, options.elements);
var inCacheArray = $.inArray(elem, cache);
if (inElementsArray != -1) {
options.elements.splice(inElementsArray, 1);
}
if (inCacheArray != -1) {
cache.splice(inCacheArray, 1);
}
});
};
/*
* Throttle function borrowed from:
* Underscore.js 1.5.2
* http://underscorejs.org
* (c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
* Underscore may be freely distributed under the MIT license.
*/
function throttle(func, wait) {
var context, args, result;
var timeout = null;
var previous = 0;
var later = function() {
previous = new Date;
timeout = null;
result = func.apply(context, args);
};
return function() {
var now = new Date;
if (!previous) previous = now;
var remaining = wait - (now - previous);
context = this;
args = arguments;
if (remaining <= 0) {
clearTimeout(timeout);
timeout = null;
previous = now;
result = func.apply(context, args);
} else if (!timeout) {
timeout = setTimeout(later, remaining);
}
return result;
};
}
/*
* Scroll Event
*/
function bindScrollDepth() {
scrollEventBound = true;
$window.on('scroll.scrollDepth', throttle(function() {
/*
* We calculate document and window height on each scroll event to
* account for dynamic DOM changes.
*/
var docHeight = $(document).height(),
winHeight = window.innerHeight ? window.innerHeight : $window.height(),
scrollDistance = $window.scrollTop() + winHeight,
/* Recalculate percentage marks */
marks = calculateMarks(docHeight),
/* Timing */
timing = +new Date - startTime;
checkMarks(marks, scrollDistance, timing);
}, 500));
}
init();
};
/* UMD export */
return $.scrollDepth;
}));
jQuery.scrollDepth();
} else {
setTimeout(monsterinsights_scroll_tracking_load, 200);
}
}
monsterinsights_scroll_tracking_load();
});
}
/* End MonsterInsights Scroll Tracking */
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