ScrollMagic

ScrollMagic.Scene

new ScrollMagic.Scene(options)

A Scene defines where the controller should react and how.

Parameters:
Name Type Argument Description
options object <optional>

Options for the Scene. The options can be updated at any time.
Instead of setting the options for each scene individually you can also set them globally in the controller as the controllers globalSceneOptions option. The object accepts the same properties as the ones below.
When a scene is added to the controller the options defined using the Scene constructor will be overwritten by those set in globalSceneOptions.

Properties
Name Type Argument Default Description
duration number | function <optional>
 0

The duration of the scene. If 0 tweens will auto-play when reaching the scene start point, pins will be pinned indefinetly starting at the start position.
A function retuning the duration value is also supported. Please see Scene.duration() for details.
offset number <optional>
 0

Offset Value for the Trigger Position. If no triggerElement is defined this will be the scroll distance from the start of the page, after which the scene will start.
triggerElement string | object <optional>
 null

Selector or DOM object that defines the start of the scene. If undefined the scene will start right at the start of the page (unless an offset is set).
triggerHook number | string <optional>
 "onCenter"

Can be a number between 0 and 1 defining the position of the trigger Hook in relation to the viewport.
Can also be defined using a string:

  • "onEnter" => 1
  • "onCenter" => 0.5
  • "onLeave" => 0
reverse boolean <optional>
 true

Should the scene reverse, when scrolling up?
loglevel number <optional>
 2

Loglevel for debugging. Note that logging is disabled in the minified version of ScrollMagic.

  • 0 => silent
  • 1 => errors
  • 2 => errors, warnings
  • 3 => errors, warnings, debuginfo
Source:
Example
// create a standard scene and add it to a controller
new ScrollMagic.Scene()
		.addTo(controller);

// create a scene with custom options and assign a handler to it.
var scene = new ScrollMagic.Scene({
		duration: 100,
		offset: 200,
		triggerHook: "onEnter",
		reverse: false
});

Scene Control Methods

addTo(controller) → {Scene}

Add the scene to a controller.
This is the equivalent to Controller.addScene(scene).

Parameters:
Name Type Description
controller ScrollMagic.Controller

The controller to which the scene should be added.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// add a scene to a ScrollMagic Controller
scene.addTo(controller);

controller() → {ScrollMagic.Controller}

Get the associated controller.

Source:
Returns:

Parent controller or undefined

{ ScrollMagic.Controller }
Example
// get the controller of a scene
var controller = scene.controller();

destroy(reset) → {null}

Destroy the scene and everything.

Parameters:
Name Type Argument Default Description
reset boolean <optional>
 false

If true the pin and tween (if existent) will be reset.
Source:
Returns:

Null to unset handler variables.

{ null }
Example
// destroy the scene without resetting the pin and tween to their initial positions
scene = scene.destroy();

// destroy the scene and reset the pin and tween
scene = scene.destroy(true);

progress(progress) → {number}

Get or Set the scene's progress.
Usually it shouldn't be necessary to use this as a setter, as it is set automatically by scene.update().
The order in which the events are fired depends on the duration of the scene:

  1. Scenes with duration == 0:
    Scenes that have no duration by definition have no ending. Thus the end event will never be fired.
    When the trigger position of the scene is passed the events are always fired in this order:
    enter, start, progress when scrolling forward
    and
    progress, start, leave when scrolling in reverse
  2. Scenes with duration > 0:
    Scenes with a set duration have a defined start and end point.
    When scrolling past the start position of the scene it will fire these events in this order:
    enter, start, progress
    When continuing to scroll and passing the end point it will fire these events:
    progress, end, leave
    When reversing through the end point these events are fired:
    enter, end, progress
    And when continuing to scroll past the start position in reverse it will fire:
    progress, start, leave
    In between start and end the progress event will be called constantly, whenever the progress changes.

In short:
enter events will always trigger before the progress update and leave envents will trigger after the progress update.
start and end will always trigger at their respective position.

Please review the event descriptions for details on the events and the event object that is passed to the callback.

Parameters:
Name Type Argument Description
progress number <optional>

The new progress value of the scene [0-1].
Source:
Fires:
  • Scene.enter,event: when used as setter
  • Scene.start,event: when used as setter
  • Scene.progress,event: when used as setter
  • Scene.end,event: when used as setter
  • Scene.leave,event: when used as setter
Returns:

  • get - Current scene progress.

    { number }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current scene progress
var progress = scene.progress();

// set new scene progress
scene.progress(0.3);

refresh() → {Scene}

Updates dynamic scene variables like the trigger element position or the duration. This method is automatically called in regular intervals from the controller. See ScrollMagic.Controller option refreshInterval.

You can call it to minimize lag, for example when you intentionally change the position of the triggerElement. If you don't it will simply be updated in the next refresh interval of the container, which is usually sufficient.

Since:
  • 1.1.0

Source:
Fires:
  • Scene.shift,event: if the trigger element position or the duration changed
  • Scene.change,event: if the duration changed
Returns:

Parent object for chaining.

{ Scene }
Example
scene = new ScrollMagic.Scene({triggerElement: "#trigger"});

// change the position of the trigger
$("#trigger").css("top", 500);
// immediately let the scene know of this change
scene.refresh();

remove() → {Scene}

Remove the scene from the controller.
This is the equivalent to Controller.removeScene(scene). The scene will not be updated anymore until you readd it to a controller. To remove the pin or the tween you need to call removeTween() or removePin() respectively.

Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// remove the scene from its controller
scene.remove();

removeClassToggle(reset) → {Scene}

Remove the class binding from the scene.

Parameters:
Name Type Argument Default Description
reset boolean <optional>
 false

If false and the classes are currently active, they will remain on the element. If true they will be removed.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// remove class binding from the scene without reset
scene.removeClassToggle();

// remove class binding and remove the changes it caused
scene.removeClassToggle(true);

removePin(reset) → {Scene}

Remove the pin from the scene.

Parameters:
Name Type Argument Default Description
reset boolean <optional>
 false

If false the spacer will not be removed and the element's position will not be reset.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// remove the pin from the scene without resetting it (the spacer is not removed)
scene.removePin();

// remove the pin from the scene and reset the pin element to its initial position (spacer is removed)
scene.removePin(true);

setClassToggle(element, classes) → {Scene}

Define a css class modification while the scene is active.
When the scene triggers the classes will be added to the supplied element and removed, when the scene is over. If the scene duration is 0 the classes will only be removed if the user scrolls back past the start position.

Parameters:
Name Type Description
element string | object

A Selector targeting one or more elements or a DOM object that is supposed to be modified.
classes string

One or more Classnames (separated by space) that should be added to the element during the scene.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// add the class 'myclass' to the element with the id 'my-elem' for the duration of the scene
scene.setClassToggle("#my-elem", "myclass");

// add multiple classes to multiple elements defined by the selector '.classChange'
scene.setClassToggle(".classChange", "class1 class2 class3");

setPin(element, settings) → {Scene}

Pin an element for the duration of the tween.
If the scene duration is 0 the element will only be unpinned, if the user scrolls back past the start position.
Make sure only one pin is applied to an element at the same time. An element can be pinned multiple times, but only successively. NOTE: The option pushFollowers has no effect, when the scene duration is 0.

Parameters:
Name Type Argument Description
element string | object

A Selector targeting an element or a DOM object that is supposed to be pinned.
settings object <optional>

settings for the pin

Properties
Name Type Argument Default Description
pushFollowers boolean <optional>
 true

If true following elements will be "pushed" down for the duration of the pin, if false the pinned element will just scroll past them.
Ignored, when duration is 0.
spacerClass string <optional>
 "scrollmagic-pin-spacer"

Classname of the pin spacer element, which is used to replace the element.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
// pin element and push all following elements down by the amount of the pin duration.
scene.setPin("#pin");

// pin element and keeping all following elements in their place. The pinned element will move past them.
scene.setPin("#pin", {pushFollowers: false});

update(immediately) → {Scene}

Updates the Scene to reflect the current state.
This is the equivalent to Controller.updateScene(scene, immediately).
The update method calculates the scene's start and end position (based on the trigger element, trigger hook, duration and offset) and checks it against the current scroll position of the container.
It then updates the current scene state accordingly (or does nothing, if the state is already correct) – Pins will be set to their correct position and tweens will be updated to their correct progress. This means an update doesn't necessarily result in a progress change. The progress event will be fired if the progress has indeed changed between this update and the last.
NOTE: This method gets called constantly whenever ScrollMagic detects a change. The only application for you is if you change something outside of the realm of ScrollMagic, like moving the trigger or changing tween parameters.

Parameters:
Name Type Argument Default Description
immediately boolean <optional>
 false

If true the update will be instant, if false it will wait until next update cycle (better performance).
Source:
Fires:
  • Scene.event:update
Returns:

Parent object for chaining.

{ Scene }
Example
// update the scene on next tick
scene.update();

// update the scene immediately
scene.update(true);

Scene Parameters (getter / setter)

duration(newDuration) → {number}

Get or Set the duration option value. As a setter it also accepts a function returning a numeric value.
This is particularly useful for responsive setups.

The duration is updated using the supplied function every time Scene.refresh() is called, which happens periodically from the controller (see ScrollMagic.Controller option refreshInterval).
NOTE: Be aware that it's an easy way to kill performance, if you supply a function that has high CPU demand.
Even for size and position calculations it is recommended to use a variable to cache the value. (see example)
This counts double if you use the same function for multiple scenes.

Parameters:
Name Type Argument Description
newDuration number | function <optional>

The new duration of the scene.
Source:
Fires:
  • Scene.change,event: when used as setter
  • Scene.shift,event: when used as setter
Returns:

  • get - Current scene duration.

    { number }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current duration value
var duration = scene.duration();

// set a new duration
scene.duration(300);

// use a function to automatically adjust the duration to the window height.
var durationValueCache;
function getDuration () {
  return durationValueCache;
}
function updateDuration (e) {
  durationValueCache = window.innerHeight;
}
$(window).on("resize", updateDuration); // update the duration when the window size changes
$(window).triggerHandler("resize"); // set to initial value
scene.duration(getDuration); // supply duration method

enabled(newState) → {boolean|Scene}

Get or Set the current enabled state of the scene.
This can be used to disable this scene without removing or destroying it.

Parameters:
Name Type Argument Description
newState boolean <optional>

The new enabled state of the scene true or false.
Source:
Returns:

Current enabled state or parent object for chaining.

{ boolean | Scene }
Example
// get the current value
var enabled = scene.enabled();

// disable the scene
scene.enabled(false);

loglevel(newLoglevel) → {number}

Get or Set the loglevel option value.

Parameters:
Name Type Argument Description
newLoglevel number <optional>

The new loglevel setting of the scene. [0-3]
Source:
Fires:
  • Scene.change,event: when used as setter
Returns:

  • get - Current loglevel.

    { number }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current loglevel
var loglevel = scene.loglevel();

// set new loglevel
scene.loglevel(3);

offset(newOffset) → {number}

Get or Set the offset option value.

Parameters:
Name Type Argument Description
newOffset number <optional>

The new offset of the scene.
Source:
Fires:
  • Scene.change,event: when used as setter
  • Scene.shift,event: when used as setter
Returns:

  • get - Current scene offset.

    { number }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current offset
var offset = scene.offset();

// set a new offset
scene.offset(100);

reverse(newReverse) → {boolean}

Get or Set the reverse option value.

Parameters:
Name Type Argument Description
newReverse boolean <optional>

The new reverse setting of the scene.
Source:
Fires:
  • Scene.change,event: when used as setter
Returns:

  • get - Current reverse option value.

    { boolean }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current reverse option
var reverse = scene.reverse();

// set new reverse option
scene.reverse(false);

triggerElement(newTriggerElement) → {string|object}

Get or Set the triggerElement option value. Does not fire Scene.shift, because changing the trigger Element doesn't necessarily mean the start position changes. This will be determined in Scene.refresh(), which is automatically triggered.

Parameters:
Name Type Argument Description
newTriggerElement string | object <optional>

The new trigger element for the scene.
Source:
Fires:
  • Scene.change,event: when used as setter
Returns:

  • get - Current triggerElement.

    { string | object }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current triggerElement
var triggerElement = scene.triggerElement();

// set a new triggerElement using a selector
scene.triggerElement("#trigger");
// set a new triggerElement using a DOM object
scene.triggerElement(document.getElementById("trigger"));

triggerHook(newTriggerHook) → {number}

Get or Set the triggerHook option value.

Parameters:
Name Type Argument Description
newTriggerHook number | string <optional>

The new triggerHook of the scene. See Scene parameter description for value options.
Source:
Fires:
  • Scene.change,event: when used as setter
  • Scene.shift,event: when used as setter
Returns:

  • get - Current triggerHook (ALWAYS numerical).

    { number }

  • set - Parent object for chaining.

    { Scene }
Example
// get the current triggerHook value
var triggerHook = scene.triggerHook();

// set a new triggerHook using a string
scene.triggerHook("onLeave");
// set a new triggerHook using a number
scene.triggerHook(0.7);

Scene Properties (getter)

scrollOffset() → {number}

Get the current scroll offset for the start of the scene.
Mind, that the scrollOffset is related to the size of the container, if triggerHook is bigger than 0 (or "onLeave").
This means, that resizing the container or changing the triggerHook will influence the scene's start offset.

Source:
Returns:

The scroll offset (of the container) at which the scene will trigger. Y value for vertical and X value for horizontal scrolls.

{ number }
Example
// get the current scroll offset for the start and end of the scene.
var start = scene.scrollOffset();
var end = scene.scrollOffset() + scene.duration();
console.log("the scene starts at", start, "and ends at", end);

state() → {string}

Get the current state.

Source:
Returns:

"BEFORE", "DURING" or "AFTER"

{ string }
Example
// get the current state
var state = scene.state();

triggerPosition() → {number}

Get the trigger position of the scene (including the value of the offset option).

Source:
Returns:

Start position of the scene. Top position value for vertical and left position value for horizontal scrolls.

{ number }
Example
// get the scene's trigger position
var triggerPosition = scene.triggerPosition();

Event Handling

off(names, callback) → {Scene}

Remove one or more event listener.

Parameters:
Name Type Argument Description
names string

The name or names of the event that should be removed.
callback function <optional>

A specific callback function that should be removed. If none is passed all callbacks to the event listener will be removed.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
function callback (event) {
		console.log("Event fired! (" + event.type + ")");
}
// add listeners
scene.on("change update", callback);
// remove listeners
scene.off("change update", callback);

on(names, callback) → {Scene}

Add one ore more event listener.
The callback function will be fired at the respective event, and an object containing relevant data will be passed to the callback.

Parameters:
Name Type Description
names string

The name or names of the event the callback should be attached to.
callback function

A function that should be executed, when the event is dispatched. An event object will be passed to the callback.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
function callback (event) {
		console.log("Event fired! (" + event.type + ")");
}
// add listeners
scene.on("change update progress start end enter leave", callback);

trigger(name, vars) → {Scene}

Trigger an event.

Parameters:
Name Type Argument Description
name string

The name of the event that should be triggered.
vars object <optional>

An object containing info that should be passed to the callback.
Source:
Returns:

Parent object for chaining.

{ Scene }
Example
this.trigger("change");

Debuging

Events

add

Scene add event.
Fires when the scene is added to a controller. This is mostly used by plugins to know that change might be due.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
controller boolean

The controller object the scene was added to.
Since:
  • 2.0.0

Source:
Example
scene.on("add", function (event) {
	console.log('Scene was added to a new controller.');
});

change

Scene change event.
Fires whenvever a property of the scene is changed.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
what string

Indicates what value has been changed
newval mixed

The new value of the changed property
Source:
Example
scene.on("change", function (event) {
	console.log("Scene Property \"" + event.what + "\" changed to " + event.newval);
});

destroy

Scene destroy event.
Fires whenvever the scene is destroyed. This can be used to tidy up custom behaviour used in events.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
reset boolean

Indicates if the destroy method was called with reset true or false.
Since:
  • 1.1.0

Source:
Example
scene.on("enter", function (event) {
       // add custom action
       $("#my-elem").left("200");
     })
     .on("destroy", function (event) {
       // reset my element to start position
       if (event.reset) {
         $("#my-elem").left("0");
       }
     });

end

Scene end event.
Fires whenever the scroll position its the ending point of the scene.
It will also fire when scrolling back up from after the scene and going over its end position. If you want something to happen only when scrolling down/right, use the scrollDirection parameter passed to the callback.

For details on this event and the order in which it is fired, please review the Scene.progress method.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
progress number

Reflects the current progress of the scene
state string

The current state of the scene "DURING" or "AFTER"
scrollDirection string

Indicates which way we are scrolling "PAUSED", "FORWARD" or "REVERSE"
Source:
Example
scene.on("end", function (event) {
	console.log("Hit end point of scene.");
});

enter

Scene enter event.
Fires whenever the scene enters the "DURING" state.
Keep in mind that it doesn't matter if the scene plays forward or backward: This event always fires when the scene enters its active scroll timeframe, regardless of the scroll-direction.

For details on this event and the order in which it is fired, please review the Scene.progress method.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
progress number

Reflects the current progress of the scene
state string

The current state of the scene - always "DURING"
scrollDirection string

Indicates which way we are scrolling "PAUSED", "FORWARD" or "REVERSE"
Source:
Example
scene.on("enter", function (event) {
	console.log("Scene entered.");
});

leave

Scene leave event.
Fires whenever the scene's state goes from "DURING" to either "BEFORE" or "AFTER".
Keep in mind that it doesn't matter if the scene plays forward or backward: This event always fires when the scene leaves its active scroll timeframe, regardless of the scroll-direction.

For details on this event and the order in which it is fired, please review the Scene.progress method.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
progress number

Reflects the current progress of the scene
state string

The current state of the scene "BEFORE" or "AFTER"
scrollDirection string

Indicates which way we are scrolling "PAUSED", "FORWARD" or "REVERSE"
Source:
Example
scene.on("leave", function (event) {
	console.log("Scene left.");
});

progress

Scene progress event.
Fires whenever the progress of the scene changes.

For details on this event and the order in which it is fired, please review the Scene.progress method.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
progress number

Reflects the current progress of the scene
state string

The current state of the scene "BEFORE", "DURING" or "AFTER"
scrollDirection string

Indicates which way we are scrolling "PAUSED", "FORWARD" or "REVERSE"
Source:
Example
scene.on("progress", function (event) {
	console.log("Scene progress changed to " + event.progress);
});

remove

Scene remove event.
Fires when the scene is removed from a controller. This is mostly used by plugins to know that change might be due.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
Since:
  • 2.0.0

Source:
Example
scene.on("remove", function (event) {
	console.log('Scene was removed from its controller.');
});

shift

Scene shift event.
Fires whenvever the start or end scroll offset of the scene change. This happens explicitely, when one of these values change: offset, duration or triggerHook. It will fire implicitly when the triggerElement changes, if the new element has a different position (most cases). It will also fire implicitly when the size of the container changes and the triggerHook is anything other than onLeave.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
reason string

Indicates why the scene has shifted
Since:
  • 1.1.0

Source:
Example
scene.on("shift", function (event) {
	console.log("Scene moved, because the " + event.reason + " has changed.)");
});

start

Scene start event.
Fires whenever the scroll position its the starting point of the scene.
It will also fire when scrolling back up going over the start position of the scene. If you want something to happen only when scrolling down/right, use the scrollDirection parameter passed to the callback.

For details on this event and the order in which it is fired, please review the Scene.progress method.

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
progress number

Reflects the current progress of the scene
state string

The current state of the scene "BEFORE" or "DURING"
scrollDirection string

Indicates which way we are scrolling "PAUSED", "FORWARD" or "REVERSE"
Source:
Example
scene.on("start", function (event) {
	console.log("Hit start point of scene.");
});

update

Scene update event.
Fires whenever the scene is updated (but not necessarily changes the progress).

Properties:
Name Type Description
event object

The event Object passed to each callback

Properties
Name Type Description
type string

The name of the event
target Scene

The Scene object that triggered this event
startPos number

The starting position of the scene (in relation to the conainer)
endPos number

The ending position of the scene (in relation to the conainer)
scrollPos number

The current scroll position of the container
Source:
Example
scene.on("update", function (event) {
	console.log("Scene updated.");
});