Native Technologies Used
Two native browser technologies are at the core of the React Awesome Reveal performances.
Intersection Observer API
The Intersection Observer API is a performant, modern and well supported API to determine when DOM elements enters and exits the browser viewport. Using this API, it is possible to trigger specific actions when a certain element appears in the window, or when it leaves it.
The trick used by React Awesome Reveal is to add and remove CSS classes to the element(s) wrapped by the animated primitives in response to visibility change events. These classes contain rules that implement a variety of animations.
CSS Animations is an extension to the CSS specification that let the value of certain CSS properties change over time.
- The browser can leverage the hardware acceleration available on the device, improving both performances and power efficiency
React Awesome Reveal does not implement tons of features. It is focused on providing common and highly-optimized animated primitives for React applications, and it is not bloated with code that does more than that.
At the same time, it is flexible enough to let you implement custom animations by using the generic
Reveal primitive. Refer to the Custom Animations guide to know more.