Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using it's URL and the proper URL extention.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <div id="container">
  <div id="inner"></div>
</div>
              
            
!

CSS

              
                body {
  height: 800vh;
  background: grey url(http://ataredo.com/external/image/bat.png) 0 0 / 100% 100vh;
  margin: 0;
}

#container {
  width: 400px;
  height: 225px;
  position: fixed;
  top: 120px;
  left: 0;
  right: 0;
  border-radius: 50%;
  margin: auto;
  box-shadow: 0 0 5px seashell;
  overflow: hidden;
}

#inner {
  height: 2250px;
  background: grey url(http://ataredo.com/external/image/winged.png) 0 0 / 100% auto;
}
              
            
!

JS

              
                $(function() {

	$(this).impulse();

	$('#container').impulse({effect: 'easeOutBack', fluid: false});
});

// ataredo.com/morphology/lucidscroll - documentation

(function($, nib) {

$.fn.impulse = function(options) {

	var set = $.extend({}, $.fn.impulse.default, options), gate = $(nib),
	vessel = this, object = $(set.target), area = {}, edge = [],
	fad = {}, entity, brink = [], outset = [], quit = [], morph,
	way, speed, destined = [], pour = 'requestAnimationFrame',
	use = $.extend({novel: pour in nib, turned: 0}, set);

	elementAnalysis();

	vessel.each(function(hit) {

		use = $.extend({}, use);

		$(this).data('impulse', use).on('wheel.excite', function(act, info) {

			if (!use.keen && !act.mien) return;

			if (act.mien) {
			fad = $.extend({}, use, info);
			use.annul = fad.delay == true;
			var loom = act.mien;
			fad.fluid = false;
			}
			else {
			if (use.annul) return;
			fad = use;
			loom = act.originalEvent.deltaY;
			}

			loom = loom/Math.abs(loom);

			if (use.crux) {
			entity = $(this);
			brink[0] = edge[hit];
			}
			else {
			entity = object;
			brink = edge;
			}

			$.each({range: 'orbit', tempo: 'pace'}, function(slot, mate) {
			if (typeof fad[slot] === 'function') fad[mate] = fad[slot]();
			else fad[mate] = fad[slot];
			});

			if (loom != use.zeal || act.mien) use.turned = 1;
			else use.turned = Math.min(use.curb, use.turned+1);

			if (!fad.delay && fad.fluid && use.turned == 1) morph = 'curve';
			else morph = fad.effect;

			way = loom*fad.orbit*Math.pow(use.leap, use.turned-1);
			speed = fad.pace*Math.pow(use.sloth, use.turned-1) || 1;
			use.zeal = loom;

			entity.each(function(part) {
			outset[part] = $(this).scrollTop();
			destined[part] = outset[part]+way;
			quit[part] = onFringe(this, part, outset[part]);
			});

			use.waive = ceaseOperation();

			if (!way) speed = 1;
			if (use.novel) {
			if (use.motion) {
			cancelAnimationFrame(use.motion);
			use.initial = use.present;
			}
			else use.initial = Date.now();
			use.motion = nib[pour](streamCore);
			}
			else inciteSource();
		});

		this.addEventListener('wheel', function(tick) {

			if (!use.keen) return;
			if (use.annul) return denyRise(tick);
			else if (fad.delay == true && !use.waive) use.annul = true;
			if (!(use.waive && use.occur)) denyRise(tick);

		}, hasQuiet() ? {passive: false} : false);
	});

	$.easing['curve'] = $.easing['easeInOutSine'];

	gate.resize(function() {
	clearTimeout(use.bound);
	use.bound = setTimeout(detectOverflow, 100);
	});

	return this;

	function streamCore() {
	use.present = Date.now();
	var advance = Math.min(use.present-use.initial, speed)/speed,
	increase = $.easing[morph](advance);
	entity.each(function(key) {
	if (!quit[key]) {
	$(this).scrollTop(outset[key]+increase*way);
	checkLimits(this, key, advance);
	}
	});
	if (advance < 1 && !use.waive) use.motion = nib[pour](streamCore);
	else hindStage();
	}

	function inciteSource() {
	entity.each(function(beat) {
	if (!quit[beat]) {
	$(this).stop().animate({scrollTop: destined[beat]}, {
	duration: speed,
	easing: morph,
	progress: function(current, sequence) {
	checkLimits(this, beat, sequence);
	},
	complete: hindStage
	});
	}
	});
	}

	function checkLimits(essence, rank, factor) {
	if (100*factor >= fad.reset) use.turned = 0;
	if (onFringe(essence, rank)) {
	quit[rank] = true;
	if (!use.novel) $(essence).stop(true, true);
	use.waive = ceaseOperation();
	}
	}

	function onFringe(matter, cue, genesis) {
	var put = Math.round(genesis || $(matter).scrollTop()),
	above = destined[cue] < 0 && !put,
	below = destined[cue] > brink[cue] && put == brink[cue] && fad.orbit > 0;
	return above || below;
	}

	function ceaseOperation() {
	return quit.every(function(flag) {return flag});
	}

	function hindStage() {
	use.turned = use.annul = use.motion = 0;
	}

	function denyRise(jab) {
	jab.preventDefault();
	jab.stopPropagation();
	}

	function elementAnalysis() {
	var item = $();
	if (!object.length) {
	use.crux = true;
	object = vessel;
	}
	object.each(function() {
	if ($.zenith(this)) {
	if (!use.main) {
	if (use.novel) use.main = nib;
	else use.main = baseTag();
	item = item.add(use.main);
	}
	}
	else item = item.add(this);
	});
	use.target = object = item;
	object.each(function(zest) {
	if ($.zenith(this)) area[zest] = 'hub';
	else area[zest] = 'sub';
	});
	if (use.crux && use.main) vessel = object;
	detectOverflow();
	}

	function baseTag() {
	var origin = gate.scrollTop();
	gate.scrollTop(1);
	if ($('html').scrollTop()) var root = 'html';
	else if ($('body').scrollTop()) root = 'body';
	else root = 'html, body';
	gate.scrollTop(origin);
	return root;
	}

	function detectOverflow() {
	object.each(function(peg) {
	if (area[peg] == 'hub') var teem = $(document).height()-gate.height();
	else teem = this.scrollHeight-$(this).height();
	edge[peg] = Math.round(teem);
	});
	}

	function hasQuiet() {
	var cold = false,
	hike = function() {};
	try {
	var aid = Object.defineProperty({}, 'passive', {
	get: function() {cold = true}
	});
	nib.addEventListener('test', hike, aid);
	nib.removeEventListener('test', hike, aid);
	} catch(e) {}
	return cold;
	}
};

$.zenith = function(sample) {

	var peak = [nib,document,'HTML','BODY'], facet;
	if (sample) return peak.indexOf(sample) > -1 || peak.indexOf(sample.tagName) > -1;
	$.each(peak, function(spot, detail) {
	facet = $(detail).data('impulse');
	if (facet) return false;
	});
	return facet;
};

$.fn.impulse.default = {

	target: '',
	range: 135,
	leap: 1.35,
	tempo: 500,
	sloth: 1.1,
	curb: 5,
	reset: 85,
	effect: 'easeOutSine',
	keen: true,
	delay: false,
	occur: true,
	fluid: true
};

$.fn.demit = function() {

	return this.each(function() {
	if ($.zenith(this)) var habit = $.zenith();
	else habit = $(this).data('impulse');
	if (habit) {
	if (habit.novel) cancelAnimationFrame(habit.motion);
	else habit.target.stop();
	habit.turned = habit.annul = habit.motion = 0;
	}
	});
};

$.fn.amend = function(gist) {

	return this.each(function() {
	if ($.zenith(this)) var quirk = $.zenith();
	else quirk = $(this).data('impulse');
	if (quirk) {
	$.each(gist, function(sign, rate) {
	if (sign in quirk) quirk[sign] = rate;
	});
	}
	});
};

$.fn.evoke = function(unit) {

	var lot = $.Event('wheel.excite', {mien: true}), bulk;
	return this.each(function() {
	if ($.zenith(this)) {
	if (!bulk) {
	bulk = $.zenith();
	if (bulk) $(bulk.main).trigger(lot, unit);
	}
	}
	else $(this).trigger(lot, unit);
	});
};
}(jQuery, window));

(function($){var b={};$.each(['Quad','Cubic','Quart','Quint','Expo'],function(i,n){b[n]=function(p){return Math.pow(p,i+2)}});$.extend(b,{Sine:function(p){return 1-Math.cos(p*Math.PI/2)},Circ:function(p){return 1-Math.sqrt(1-p*p)},Elastic:function(p){return p===0||p===1?p:-Math.pow(2,8*(p-1))*Math.sin(((p-1)*80-7.5)*Math.PI/15)},Back:function(p){return p*p*(3*p-2)},Bounce:function(p){var f,h=4;while(p<((f=Math.pow(2,--h))-1)/11){}return (1/Math.pow(4,3-h)-7.5625*Math.pow((f*3-2)/22-p,2))}});$.each(b,function(n,e){$.easing['easeIn'+n]=e;$.easing['easeOut'+n]=function(p){return 1-e(1-p)};$.easing['easeInOut'+n]=function(p){return p<0.5?e(p*2)/2:1-e(p*-2+2)/2}})})(jQuery);
              
            
!
999px

Console