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parent 1cffc33eed
commit 9208bd921a
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<html>
<head>
<script src="jquery-3.2.1.min.js"></script>
<script src="jquery.event.move.js"></script>
<script src="jquery.twentytwenty.js"></script>
<link rel="stylesheet" href="twentytwenty.css" type="text/css" media="screen" />
</head>
<body>
<div id="container1" class="twentytwenty-container">
<img src="bardenas-caudillo-1956.jpeg">
<img src="bardenas-caudillo-2014.jpeg">
</div>
<script>
$(function(){
$("#container1").twentytwenty();
});
</script>
</body>
</html>

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// DOM.event.move
//
// 2.0.0
//
// Stephen Band
//
// Triggers 'movestart', 'move' and 'moveend' events after
// mousemoves following a mousedown cross a distance threshold,
// similar to the native 'dragstart', 'drag' and 'dragend' events.
// Move events are throttled to animation frames. Move event objects
// have the properties:
//
// pageX:
// pageY: Page coordinates of pointer.
// startX:
// startY: Page coordinates of pointer at movestart.
// distX:
// distY: Distance the pointer has moved since movestart.
// deltaX:
// deltaY: Distance the finger has moved since last event.
// velocityX:
// velocityY: Average velocity over last few events.
(function(fn) {
if (typeof define === 'function' && define.amd) {
define([], fn);
} else if ((typeof module !== "undefined" && module !== null) && module.exports) {
module.exports = fn;
} else {
fn();
}
})(function(){
var assign = Object.assign || window.jQuery && jQuery.extend;
// Number of pixels a pressed pointer travels before movestart
// event is fired.
var threshold = 8;
// Shim for requestAnimationFrame, falling back to timer. See:
// see http://paulirish.com/2011/requestanimationframe-for-smart-animating/
var requestFrame = (function(){
return (
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(fn, element){
return window.setTimeout(function(){
fn();
}, 25);
}
);
})();
var ignoreTags = {
textarea: true,
input: true,
select: true,
button: true
};
var mouseevents = {
move: 'mousemove',
cancel: 'mouseup dragstart',
end: 'mouseup'
};
var touchevents = {
move: 'touchmove',
cancel: 'touchend',
end: 'touchend'
};
var rspaces = /\s+/;
// DOM Events
var eventOptions = { bubbles: true, cancelable: true };
var eventsSymbol = Symbol('events');
function createEvent(type) {
return new CustomEvent(type, eventOptions);
}
function getEvents(node) {
return node[eventsSymbol] || (node[eventsSymbol] = {});
}
function on(node, types, fn, data, selector) {
types = types.split(rspaces);
var events = getEvents(node);
var i = types.length;
var handlers, type;
function handler(e) { fn(e, data); }
while (i--) {
type = types[i];
handlers = events[type] || (events[type] = []);
handlers.push([fn, handler]);
node.addEventListener(type, handler);
}
}
function off(node, types, fn, selector) {
types = types.split(rspaces);
var events = getEvents(node);
var i = types.length;
var type, handlers, k;
if (!events) { return; }
while (i--) {
type = types[i];
handlers = events[type];
if (!handlers) { continue; }
k = handlers.length;
while (k--) {
if (handlers[k][0] === fn) {
node.removeEventListener(type, handlers[k][1]);
handlers.splice(k, 1);
}
}
}
}
function trigger(node, type, properties) {
// Don't cache events. It prevents you from triggering an event of a
// given type from inside the handler of another event of that type.
var event = createEvent(type);
if (properties) { assign(event, properties); }
node.dispatchEvent(event);
}
// Constructors
function Timer(fn){
var callback = fn,
active = false,
running = false;
function trigger(time) {
if (active){
callback();
requestFrame(trigger);
running = true;
active = false;
}
else {
running = false;
}
}
this.kick = function(fn) {
active = true;
if (!running) { trigger(); }
};
this.end = function(fn) {
var cb = callback;
if (!fn) { return; }
// If the timer is not running, simply call the end callback.
if (!running) {
fn();
}
// If the timer is running, and has been kicked lately, then
// queue up the current callback and the end callback, otherwise
// just the end callback.
else {
callback = active ?
function(){ cb(); fn(); } :
fn ;
active = true;
}
};
}
// Functions
function noop() {}
function preventDefault(e) {
e.preventDefault();
}
function isIgnoreTag(e) {
return !!ignoreTags[e.target.tagName.toLowerCase()];
}
function isPrimaryButton(e) {
// Ignore mousedowns on any button other than the left (or primary)
// mouse button, or when a modifier key is pressed.
return (e.which === 1 && !e.ctrlKey && !e.altKey);
}
function identifiedTouch(touchList, id) {
var i, l;
if (touchList.identifiedTouch) {
return touchList.identifiedTouch(id);
}
// touchList.identifiedTouch() does not exist in
// webkit yet… we must do the search ourselves...
i = -1;
l = touchList.length;
while (++i < l) {
if (touchList[i].identifier === id) {
return touchList[i];
}
}
}
function changedTouch(e, data) {
var touch = identifiedTouch(e.changedTouches, data.identifier);
// This isn't the touch you're looking for.
if (!touch) { return; }
// Chrome Android (at least) includes touches that have not
// changed in e.changedTouches. That's a bit annoying. Check
// that this touch has changed.
if (touch.pageX === data.pageX && touch.pageY === data.pageY) { return; }
return touch;
}
// Handlers that decide when the first movestart is triggered
function mousedown(e){
// Ignore non-primary buttons
if (!isPrimaryButton(e)) { return; }
// Ignore form and interactive elements
if (isIgnoreTag(e)) { return; }
on(document, mouseevents.move, mousemove, e);
on(document, mouseevents.cancel, mouseend, e);
}
function mousemove(e, data){
checkThreshold(e, data, e, removeMouse);
}
function mouseend(e, data) {
removeMouse();
}
function removeMouse() {
off(document, mouseevents.move, mousemove);
off(document, mouseevents.cancel, mouseend);
}
function touchstart(e) {
// Don't get in the way of interaction with form elements
if (ignoreTags[e.target.tagName.toLowerCase()]) { return; }
var touch = e.changedTouches[0];
// iOS live updates the touch objects whereas Android gives us copies.
// That means we can't trust the touchstart object to stay the same,
// so we must copy the data. This object acts as a template for
// movestart, move and moveend event objects.
var data = {
target: touch.target,
pageX: touch.pageX,
pageY: touch.pageY,
identifier: touch.identifier,
// The only way to make handlers individually unbindable is by
// making them unique.
touchmove: function(e, data) { touchmove(e, data); },
touchend: function(e, data) { touchend(e, data); }
};
on(document, touchevents.move, data.touchmove, data);
on(document, touchevents.cancel, data.touchend, data);
}
function touchmove(e, data) {
var touch = changedTouch(e, data);
if (!touch) { return; }
checkThreshold(e, data, touch, removeTouch);
}
function touchend(e, data) {
var touch = identifiedTouch(e.changedTouches, data.identifier);
if (!touch) { return; }
removeTouch(data);
}
function removeTouch(data) {
off(document, touchevents.move, data.touchmove);
off(document, touchevents.cancel, data.touchend);
}
function checkThreshold(e, data, touch, fn) {
var distX = touch.pageX - data.pageX;
var distY = touch.pageY - data.pageY;
// Do nothing if the threshold has not been crossed.
if ((distX * distX) + (distY * distY) < (threshold * threshold)) { return; }
triggerStart(e, data, touch, distX, distY, fn);
}
function triggerStart(e, data, touch, distX, distY, fn) {
var touches = e.targetTouches;
var time = e.timeStamp - data.timeStamp;
// Create a movestart object with some special properties that
// are passed only to the movestart handlers.
var template = {
altKey: e.altKey,
ctrlKey: e.ctrlKey,
shiftKey: e.shiftKey,
startX: data.pageX,
startY: data.pageY,
distX: distX,
distY: distY,
deltaX: distX,
deltaY: distY,
pageX: touch.pageX,
pageY: touch.pageY,
velocityX: distX / time,
velocityY: distY / time,
identifier: data.identifier,
targetTouches: touches,
finger: touches ? touches.length : 1,
enableMove: function() {
this.moveEnabled = true;
this.enableMove = noop;
e.preventDefault();
}
};
// Trigger the movestart event.
trigger(data.target, 'movestart', template);
// Unbind handlers that tracked the touch or mouse up till now.
fn(data);
}
// Handlers that control what happens following a movestart
function activeMousemove(e, data) {
var timer = data.timer;
data.touch = e;
data.timeStamp = e.timeStamp;
timer.kick();
}
function activeMouseend(e, data) {
var target = data.target;
var event = data.event;
var timer = data.timer;
removeActiveMouse();
endEvent(target, event, timer, function() {
// Unbind the click suppressor, waiting until after mouseup
// has been handled.
setTimeout(function(){
off(target, 'click', preventDefault);
}, 0);
});
}
function removeActiveMouse() {
off(document, mouseevents.move, activeMousemove);
off(document, mouseevents.end, activeMouseend);
}
function activeTouchmove(e, data) {
var event = data.event;
var timer = data.timer;
var touch = changedTouch(e, event);
if (!touch) { return; }
// Stop the interface from gesturing
e.preventDefault();
event.targetTouches = e.targetTouches;
data.touch = touch;
data.timeStamp = e.timeStamp;
timer.kick();
}
function activeTouchend(e, data) {
var target = data.target;
var event = data.event;
var timer = data.timer;
var touch = identifiedTouch(e.changedTouches, event.identifier);
// This isn't the touch you're looking for.
if (!touch) { return; }
removeActiveTouch(data);
endEvent(target, event, timer);
}
function removeActiveTouch(data) {
off(document, touchevents.move, data.activeTouchmove);
off(document, touchevents.end, data.activeTouchend);
}
// Logic for triggering move and moveend events
function updateEvent(event, touch, timeStamp) {
var time = timeStamp - event.timeStamp;
event.distX = touch.pageX - event.startX;
event.distY = touch.pageY - event.startY;
event.deltaX = touch.pageX - event.pageX;
event.deltaY = touch.pageY - event.pageY;
// Average the velocity of the last few events using a decay
// curve to even out spurious jumps in values.
event.velocityX = 0.3 * event.velocityX + 0.7 * event.deltaX / time;
event.velocityY = 0.3 * event.velocityY + 0.7 * event.deltaY / time;
event.pageX = touch.pageX;
event.pageY = touch.pageY;
}
function endEvent(target, event, timer, fn) {
timer.end(function(){
trigger(target, 'moveend', event);
return fn && fn();
});
}
// Set up the DOM
function movestart(e) {
if (e.defaultPrevented) { return; }
if (!e.moveEnabled) { return; }
var event = {
startX: e.startX,
startY: e.startY,
pageX: e.pageX,
pageY: e.pageY,
distX: e.distX,
distY: e.distY,
deltaX: e.deltaX,
deltaY: e.deltaY,
velocityX: e.velocityX,
velocityY: e.velocityY,
identifier: e.identifier,
targetTouches: e.targetTouches,
finger: e.finger
};
var data = {
target: e.target,
event: event,
timer: new Timer(update),
touch: undefined,
timeStamp: e.timeStamp
};
function update(time) {
updateEvent(event, data.touch, data.timeStamp);
trigger(data.target, 'move', event);
}
if (e.identifier === undefined) {
// We're dealing with a mouse event.
// Stop clicks from propagating during a move
on(e.target, 'click', preventDefault);
on(document, mouseevents.move, activeMousemove, data);
on(document, mouseevents.end, activeMouseend, data);
}
else {
// In order to unbind correct handlers they have to be unique
data.activeTouchmove = function(e, data) { activeTouchmove(e, data); };
data.activeTouchend = function(e, data) { activeTouchend(e, data); };
// We're dealing with a touch.
on(document, touchevents.move, data.activeTouchmove, data);
on(document, touchevents.end, data.activeTouchend, data);
}
}
on(document, 'mousedown', mousedown);
on(document, 'touchstart', touchstart);
on(document, 'movestart', movestart);
// jQuery special events
//
// jQuery event objects are copies of DOM event objects. They need
// a little help copying the move properties across.
if (!window.jQuery) { return; }
var properties = ("startX startY pageX pageY distX distY deltaX deltaY velocityX velocityY").split(' ');
function enableMove1(e) { e.enableMove(); }
function enableMove2(e) { e.enableMove(); }
function enableMove3(e) { e.enableMove(); }
function add(handleObj) {
var handler = handleObj.handler;
handleObj.handler = function(e) {
// Copy move properties across from originalEvent
var i = properties.length;
var property;
while(i--) {
property = properties[i];
e[property] = e.originalEvent[property];
}
handler.apply(this, arguments);
};
}
jQuery.event.special.movestart = {
setup: function() {
// Movestart must be enabled to allow other move events
on(this, 'movestart', enableMove1);
// Do listen to DOM events
return false;
},
teardown: function() {
off(this, 'movestart', enableMove1);
return false;
},
add: add
};
jQuery.event.special.move = {
setup: function() {
on(this, 'movestart', enableMove2);
return false;
},
teardown: function() {
off(this, 'movestart', enableMove2);
return false;
},
add: add
};
jQuery.event.special.moveend = {
setup: function() {
on(this, 'movestart', enableMove3);
return false;
},
teardown: function() {
off(this, 'movestart', enableMove3);
return false;
},
add: add
};
});

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(function($){
$.fn.twentytwenty = function(options) {
var options = $.extend({default_offset_pct: 0.5, orientation: 'horizontal', before_label: 'Before', after_label: 'After', no_overlay: false}, options);
return this.each(function() {
var sliderPct = options.default_offset_pct;
var container = $(this);
var sliderOrientation = options.orientation;
var beforeDirection = (sliderOrientation === 'vertical') ? 'down' : 'left';
var afterDirection = (sliderOrientation === 'vertical') ? 'up' : 'right';
container.wrap("<div class='twentytwenty-wrapper twentytwenty-" + sliderOrientation + "'></div>");
if(!options.no_overlay) {
container.append("<div class='twentytwenty-overlay'></div>");
}
var beforeImg = container.find("img:first");
var afterImg = container.find("img:last");
container.append("<div class='twentytwenty-handle'></div>");
var slider = container.find(".twentytwenty-handle");
slider.append("<span class='twentytwenty-" + beforeDirection + "-arrow'></span>");
slider.append("<span class='twentytwenty-" + afterDirection + "-arrow'></span>");
container.addClass("twentytwenty-container");
beforeImg.addClass("twentytwenty-before");
afterImg.addClass("twentytwenty-after");
var overlay = container.find(".twentytwenty-overlay");
overlay.append("<div class='twentytwenty-before-label' data-content='"+options.before_label+"'></div>");
overlay.append("<div class='twentytwenty-after-label' data-content='"+options.after_label+"'></div>");
var calcOffset = function(dimensionPct) {
var w = beforeImg.width();
var h = beforeImg.height();
return {
w: w+"px",
h: h+"px",
cw: (dimensionPct*w)+"px",
ch: (dimensionPct*h)+"px"
};
};
var adjustContainer = function(offset) {
if (sliderOrientation === 'vertical') {
beforeImg.css("clip", "rect(0,"+offset.w+","+offset.ch+",0)");
afterImg.css("clip", "rect("+offset.ch+","+offset.w+","+offset.h+",0)");
}
else {
beforeImg.css("clip", "rect(0,"+offset.cw+","+offset.h+",0)");
afterImg.css("clip", "rect(0,"+offset.w+","+offset.h+","+offset.cw+")");
}
container.css("height", offset.h);
};
var adjustSlider = function(pct) {
var offset = calcOffset(pct);
slider.css((sliderOrientation==="vertical") ? "top" : "left", (sliderOrientation==="vertical") ? offset.ch : offset.cw);
adjustContainer(offset);
};
$(window).on("resize.twentytwenty", function(e) {
adjustSlider(sliderPct);
});
var offsetX = 0;
var offsetY = 0;
var imgWidth = 0;
var imgHeight = 0;
slider.on("movestart", function(e) {
if (((e.distX > e.distY && e.distX < -e.distY) || (e.distX < e.distY && e.distX > -e.distY)) && sliderOrientation !== 'vertical') {
e.preventDefault();
}
else if (((e.distX < e.distY && e.distX < -e.distY) || (e.distX > e.distY && e.distX > -e.distY)) && sliderOrientation === 'vertical') {
e.preventDefault();
}
container.addClass("active");
offsetX = container.offset().left;
offsetY = container.offset().top;
imgWidth = beforeImg.width();
imgHeight = beforeImg.height();
});
slider.on("moveend", function(e) {
container.removeClass("active");
});
slider.on("move", function(e) {
if (container.hasClass("active")) {
sliderPct = (sliderOrientation === 'vertical') ? (e.pageY-offsetY)/imgHeight : (e.pageX-offsetX)/imgWidth;
if (sliderPct < 0) {
sliderPct = 0;
}
if (sliderPct > 1) {
sliderPct = 1;
}
adjustSlider(sliderPct);
}
});
container.find("img").on("mousedown", function(event) {
event.preventDefault();
});
$(window).trigger("resize.twentytwenty");
});
};
})(jQuery);

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<html>
<head>
<script src="jquery-3.2.1.min.js"></script>
<script src="jquery.event.move.js"></script>
<script src="jquery.twentytwenty.js"></script>
<link rel="stylesheet" href="twentytwenty.css" type="text/css" media="screen" />
</head>
<body>
<div id="container1" class="twentytwenty-container">
<img src="sotogordo-1945-recorte.jpeg">
<img src="sotogordo-2016-recorte.jpeg">
</div>
<script>
$(function(){
$("#container1").twentytwenty();
});
</script>
</body>
</html>

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.twentytwenty-horizontal .twentytwenty-handle:before, .twentytwenty-horizontal .twentytwenty-handle:after, .twentytwenty-vertical .twentytwenty-handle:before, .twentytwenty-vertical .twentytwenty-handle:after {
content: " ";
display: block;
background: white;
position: absolute;
z-index: 30;
-webkit-box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5); }
.twentytwenty-horizontal .twentytwenty-handle:before, .twentytwenty-horizontal .twentytwenty-handle:after {
width: 3px;
height: 9999px;
left: 50%;
margin-left: -1.5px; }
.twentytwenty-vertical .twentytwenty-handle:before, .twentytwenty-vertical .twentytwenty-handle:after {
width: 9999px;
height: 3px;
top: 50%;
margin-top: -1.5px; }
.twentytwenty-before-label, .twentytwenty-after-label, .twentytwenty-overlay {
position: absolute;
top: 0;
width: 100%;
height: 100%; }
.twentytwenty-before-label, .twentytwenty-after-label, .twentytwenty-overlay {
-webkit-transition-duration: 0.5s;
-moz-transition-duration: 0.5s;
transition-duration: 0.5s; }
.twentytwenty-before-label, .twentytwenty-after-label {
-webkit-transition-property: opacity;
-moz-transition-property: opacity;
transition-property: opacity; }
.twentytwenty-before-label:before, .twentytwenty-after-label:before {
color: white;
font-size: 13px;
letter-spacing: 0.1em; }
.twentytwenty-before-label:before, .twentytwenty-after-label:before {
position: absolute;
background: rgba(255, 255, 255, 0.2);
line-height: 38px;
padding: 0 20px;
-webkit-border-radius: 2px;
-moz-border-radius: 2px;
border-radius: 2px; }
.twentytwenty-horizontal .twentytwenty-before-label:before, .twentytwenty-horizontal .twentytwenty-after-label:before {
top: 50%;
margin-top: -19px; }
.twentytwenty-vertical .twentytwenty-before-label:before, .twentytwenty-vertical .twentytwenty-after-label:before {
left: 50%;
margin-left: -45px;
text-align: center;
width: 90px; }
.twentytwenty-left-arrow, .twentytwenty-right-arrow, .twentytwenty-up-arrow, .twentytwenty-down-arrow {
width: 0;
height: 0;
border: 6px inset transparent;
position: absolute; }
.twentytwenty-left-arrow, .twentytwenty-right-arrow {
top: 50%;
margin-top: -6px; }
.twentytwenty-up-arrow, .twentytwenty-down-arrow {
left: 50%;
margin-left: -6px; }
.twentytwenty-container {
-webkit-box-sizing: content-box;
-moz-box-sizing: content-box;
box-sizing: content-box;
z-index: 0;
overflow: hidden;
position: relative;
-webkit-user-select: none;
-moz-user-select: none; }
.twentytwenty-container img {
max-width: 100%;
position: absolute;
top: 0;
display: block; }
.twentytwenty-container.active .twentytwenty-overlay, .twentytwenty-container.active :hover.twentytwenty-overlay {
background: rgba(0, 0, 0, 0); }
.twentytwenty-container.active .twentytwenty-overlay .twentytwenty-before-label,
.twentytwenty-container.active .twentytwenty-overlay .twentytwenty-after-label, .twentytwenty-container.active :hover.twentytwenty-overlay .twentytwenty-before-label,
.twentytwenty-container.active :hover.twentytwenty-overlay .twentytwenty-after-label {
opacity: 0; }
.twentytwenty-container * {
-webkit-box-sizing: content-box;
-moz-box-sizing: content-box;
box-sizing: content-box; }
.twentytwenty-before-label {
opacity: 0; }
.twentytwenty-before-label:before {
content: attr(data-content); }
.twentytwenty-after-label {
opacity: 0; }
.twentytwenty-after-label:before {
content: attr(data-content); }
.twentytwenty-horizontal .twentytwenty-before-label:before {
left: 10px; }
.twentytwenty-horizontal .twentytwenty-after-label:before {
right: 10px; }
.twentytwenty-vertical .twentytwenty-before-label:before {
top: 10px; }
.twentytwenty-vertical .twentytwenty-after-label:before {
bottom: 10px; }
.twentytwenty-overlay {
-webkit-transition-property: background;
-moz-transition-property: background;
transition-property: background;
background: rgba(0, 0, 0, 0);
z-index: 25; }
.twentytwenty-overlay:hover {
background: rgba(0, 0, 0, 0.5); }
.twentytwenty-overlay:hover .twentytwenty-after-label {
opacity: 1; }
.twentytwenty-overlay:hover .twentytwenty-before-label {
opacity: 1; }
.twentytwenty-before {
z-index: 20; }
.twentytwenty-after {
z-index: 10; }
.twentytwenty-handle {
height: 38px;
width: 38px;
position: absolute;
left: 50%;
top: 50%;
margin-left: -22px;
margin-top: -22px;
border: 3px solid white;
-webkit-border-radius: 1000px;
-moz-border-radius: 1000px;
border-radius: 1000px;
-webkit-box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: 0px 0px 12px rgba(51, 51, 51, 0.5);
z-index: 40;
cursor: pointer; }
.twentytwenty-horizontal .twentytwenty-handle:before {
bottom: 50%;
margin-bottom: 22px;
-webkit-box-shadow: 0 3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: 0 3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: 0 3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5); }
.twentytwenty-horizontal .twentytwenty-handle:after {
top: 50%;
margin-top: 22px;
-webkit-box-shadow: 0 -3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: 0 -3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: 0 -3px 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5); }
.twentytwenty-vertical .twentytwenty-handle:before {
left: 50%;
margin-left: 22px;
-webkit-box-shadow: 3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: 3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: 3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5); }
.twentytwenty-vertical .twentytwenty-handle:after {
right: 50%;
margin-right: 22px;
-webkit-box-shadow: -3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
-moz-box-shadow: -3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5);
box-shadow: -3px 0 0 white, 0px 0px 12px rgba(51, 51, 51, 0.5); }
.twentytwenty-left-arrow {
border-right: 6px solid white;
left: 50%;
margin-left: -17px; }
.twentytwenty-right-arrow {
border-left: 6px solid white;
right: 50%;
margin-right: -17px; }
.twentytwenty-up-arrow {
border-bottom: 6px solid white;
top: 50%;
margin-top: -17px; }
.twentytwenty-down-arrow {
border-top: 6px solid white;
bottom: 50%;
margin-bottom: -17px; }