![]() This Hook gives us access to a ref, that we can pass into the components we want to watch, and the inView Boolean, which tells us whether a component is in the viewport.įor example, if we pass ref to a component as a prop and log inView to the console, the console will display true when the component is scrolled into the viewport and false when it leaves the viewport. ![]() UseInView is a react-intersection-observer Hook that lets us track when a component is visible in the viewport. For example, we can use the control.start and control.stop methods to manually start and stop our animations. The useAnimation Hook provides helper methods that let us control the sequence in which our animations occur. Now that we have a working animation for our motion component, the next step is to use the react-intersection-observer library to access the Intersection Observer API and trigger the animation when the component is in view.Īdding scroll reveal animation with useInView and useAnimation Hooksįramer Motion animates elements when they mount, so before we can animate elements based on their scroll position, we need to be able to control when they mount and unmount. The motion component will inherit the values of the variant object’s hidden and visible properties and animate accordingly: Now, let's set up a simple React project and install the necessary dependencies.Įnter fullscreen mode Exit fullscreen mode React-intersection-observer is a relatively small package, so there’s no need to worry about the overhead it may add to your project. This library provides Hooks and render props that make it easy to track the scroll position of elements on the viewport. We’ll be using the react-intersection-observer library, which is a React implementation of the intersection observer API. This is the approach that we’ll follow in this article. This JavaScript API provides a way to asynchronously observe changes in the intersection of a target element with a top-level document viewport.Īccording to the documentation, this API registers a callback function that is executed whenever an element we want to monitor enters or exits another element or enters or exits the viewport.Īlternatively, we can use a library that is designed to handle this functionality. We can build this functionality from scratch as a custom Hook using the Intersection Observer API. To address this, we’ll need to implement an intersection observer functionality that will prevent an element from mounting until its scroll position is in the viewport. It doesn't have inbuilt functionality for animating elements based on their scroll position on the viewport. What is intersection observer functionality?įramer Motion animates elements when they mount on the DOM. The properties defined in the object are animated when the component mounts. animate takes in an object with the defined properties of the components to be animated. The motion function is used to create motion components, and these are the building blocks of Framer Motion.īy prefixing motion to a regular HTML or SVG element, the element automatically becomes a motion component: Motion ComponentĪ motion component has access to several props, including the animate prop. Motion and uaeAnimation are two styles that are triggered and controlled by functions exposed by Framer Motion. ![]() Framer Motion takes a different approach, by animating elements under the hood with preconfigured styles. Some React animations libraries, like react-transition-group and transition-hook, animate elements with manually configured CSS transitions. It provides production-ready animations and a low-level API to help simplify the process of integrating animations into an application. Let’s start with a little background on Framer Motion and intersection observer functionality.įramer Motion is an animation library for creating declarative animations in React. This article will introduce the library’s basic concepts and build on those in the demonstration portion. There’s no need to have any prior knowledge of Framer Motion. Working knowledge of CSS properties such as opacity, transition, and scale.Working knowledge of React and its concepts, including Hooks.What is intersection observer functionality?.In this article, we’ll demonstrate how to create scroll animations with Framer Motion, a complete animation library that doesn't require you to be a CSS expert to create beautiful animations. Many animation libraries promise to simplify the process, but most simply aren’t comprehensive enough for building complex animations. However, attempting to create stunning animations with CSS can be nerve-wracking. Animations can provide a powerful user experience if they are well executed.
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