Props

All available options for scroll effect animation configurations of a parallax element are defined in the props option.

parallaxController.createElement({
  el: document.querySelector('.your-element'),
  props: {
    // ...your props here
  },
});

Configuration Props

The following properties can be provided to configure the scroll animation:

Name	Type	Default	Description
speed	number		A value representing the elements scroll speed. If less than zero scroll will appear slower. If greater than zero scroll will appear faster.
easing	string or number[]		String representing an easing preset or array of params to supply to a cubic bezier easing function.
rootMargin	object		Margin to be applied as the bounds around an element. This will affect when an element is determined to be considered in the viewport. Example: { top: 100, right: 100, bottom: 100, left: 100 }
disabled	boolean	false	Disables parallax effects on individual elements when true.
shouldAlwaysCompleteAnimation	boolean	false	Always start and end animations at the given effect values - if the element is positioned inside the view when scroll is at zero or ends in view at final scroll position, the initial and final positions are used to determine progress instead of the scroll view size.
shouldDisableScalingTranslations	boolean	false	Enable scaling translations - translate effects that cause the element to appear in the view longer must be scaled up so that animation doesn't end early.
startScroll	number		Scroll top value to begin the animation. When provided along with endScroll relative scroll values will be ignored.
endScroll	number		Scroll top value to end the animation. When provided along with startScroll relative scroll values will be ignored.
targetElement	HTMLElement		Provides an element to track and determine the scroll progress. Use when scroll progress should be independent of parallax element's original position. See storybook for example.

CSS Effect Props

All props for creating CSS effects are defined by a start and end value represented by an array.

const translateY = [-100, 100];

parallaxController.createElement({
  el: document.querySelector('.your-element'),
  props: {
    translateY,
  },
});

How Effects Progress

The start of an effect begins when the top of the element enters the bottom of the view.

The end of an effect begins when the bottom of the element exits the top of the view.

Available CSS Effects

These are all the supported CSS effects:

Name	Type	Description
translateX	string[] or number[]	Start and end translation on x-axis in %, px, vw or vh. If no unit is passed percent is assumed. Percent is based on the elements width.
translateY	string[] or number[]	Start and end translation on y-axis in %, px, vw or vh. If no unit is passed percent is assumed. Percent is based on the elements height.
rotate	string[] or number[]	Start and end rotation on z-axis in deg, rad, or turn. If no unit is passed deg is assumed.
rotateX	string[] or number[]	Start and end rotation on x-axis in deg, rad, or turn. If no unit is passed deg is assumed.
rotateY	string[] or number[]	Start and end rotation on y-axis in deg, rad, or turn. If no unit is passed deg is assumed.
rotateZ	string[] or number[]	Start and end rotation on z-axis in deg, rad, or turn. If no unit is passed deg is assumed.
scale	number[]	Start and end scale on x-axis and y-axis.
scaleX	number[]	Start and end scale on x-axis.
scaleY	number[]	Start and end scale on y-axis.
scaleZ	number[]	Start and end scale on z-axis.
opacity	number[]	Start and end opacity value.

Callback Props

Example using onChange callback

const onChange = element => console.log(element);

parallaxController.createElement({
  el: document.querySelector('.your-element'),
  props: {
    onChange,
  },
});

All available callbacks:

Name	Type	Description
onProgressChange	function	Callback for when the progress of an element in the viewport changes.
onChange	function	Callback for when the progress of an element in the viewport changes and includes the Element as a parameter
onEnter	function	Callback for when an element enters the viewport and includes the Element as a parameter.
onExit	function	Callback for when an element exits the viewport and includes the Element as a parameter.

Easing Presets

Example of setting easing:

const easing = 'easeInCubic';

parallaxController.createElement({
  el: document.querySelector('.your-element'),
  props: {
    easing,
  },
});

The following easing values are preset and can be used as easing

ease
easeIn
easeOut
easeInOut
easeInQuad
easeInCubic
easeInQuart
easeInQuint
easeInSine
easeInExpo
easeInCirc
easeOutQuad
easeOutCubic
easeOutQuart
easeOutQuint
easeOutSine
easeOutExpo
easeOutCirc
easeInOutQuad
easeInOutCubic
easeInOutQuart
easeInOutQuint
easeInOutSine
easeInOutExpo
easeInOutCirc
easeInBack
easeOutBack
easeInOutBack

Easing Individual Effects

You can provide various easing values to each effect by defining it as the third element in the array

const translateY = [-100, 100, 'easeInOut'];
const scale = [0, 1, 'easeOutBack'];

parallaxController.createElement({
  el: document.querySelector('.your-element'),
  props: {
    translateY,
    scale,
  },
});

Cubic Bezier Easing Function

Just like with CSS cubic-bezier(0.2,-0.67,1,-0.62);, you can supply the 4 params to a custom bezier function.

const easing = [0.2, -0.6, 1, -0.6];