React component to animate elements on scroll with animate.css
npm install react-animate-on-scroll
``
npm install react-animate-on-scroll --save
If you want to use the animations from animate.css, be sure to include animate.css in someway in your project
This can be done in a number of ways, eg:
npm install --save animate.css
and then importing in your project:
import "animate.css/animate.compat.css"
Or by simply including a link to the file hosted by CDNJS:
`
import ScrollAnimation from 'react-animate-on-scroll';
Some TextProperties:
offset - default 150
The "viewport" is by default 150 pixels from the top and bottom of the screen. When part of an element is within the "viewport", animateIn is triggered. When no part of the element is in the "viewport", animateOut is triggered. This size of the "viewport" can be overridden by setting the offset property.
animateIn
Any css animation defined against a class, be it from animate.css or an animation that you have created yourself. The Animation triggers when the element enters the "viewport" (see offset property for more details on this).
animateOut
Any css animation defined against a class, be it from animate.css or an animation that you have created yourself. The Animation triggers when the element is leaving the "viewport" (see offset property for more details on this).
duration - default 1
Animation duration in seconds.
initiallyVisible - default false
Whether the element should be visible to begin with or not.
delay - default 0
How long to delay the animation for (in milliseconds) once it enters or leaves the view.
animateOnce - default false
Whether the element should only animate once or not.
style - default {}
A style object can be assigned to any ScrollAnimation component and will be passed to the rendered dom element. Its probably best to avoid manually setting animationDuration or opacity as the component will modify those attributes.
scrollableParentSelector
By default the code checks to see if the element is visible within the window. This can be changed to any other parent element of the ScrollAnimation by adding a css selector pointing to the parent that you wish to use.
afterAnimatedIn
Callback function to run once the animateIn animation has completed. Receives the visibility of the element at time of execution.
Example:
`
function(visible) {
if (visible.inViewport) {
// Part of the element is in the viewport (the area defined by the offset property)
} else if (visible.onScreen) {
// Part of the element is visible on the screen
} else {
// Element is no longer visible
}
}
afterAnimatedOut
Callback function to run once the animateOut animation has completed. Receives the visibility of the element at time of execution.
Example:
`
function(visible) {
if (visible.inViewport) {
// Part of the element is in the viewport (the area defined by the offset property)
} else if (visible.onScreen) {
// Part of the element is visible on the screen
} else {
// Element is no longer visible
}
}
animatePreScroll - default true
By default if a ScrollAnimation is in view as soon as a page loads, then the animation will begin. If you don't want the animation to being until the user scrolls, then set this to false.
In the project root:
`
npm install
There are some automated test cases with karma and a Chrome headless browser. I attempted to use Jest, and then to use PhantomJS, but could get neither to work with scroll events. To run them:
`
npm test
`
gulp build
`
cd demo
npm install
npm install ..
npm start