Introducing Framer Motion

Original Source: https://smashingmagazine.com/2020/10/introduction-to-framer-motion/

In this article, we’ll take a closer look at how Framer Motion helps us in creating awesome animations. We’ll learn how motion components work and learn how to chain animations together. We’ll look into how to make gesture-triggered, timed, and scroll animations with Framer motion. Along the way, we’ll use the things we learn to build five demo applications I’ve set up to show us how we can integrate Framer Motion into real-world applications.

This tutorial will be beneficial to readers who are interested in integrating animations in their React application.

Note: This article requires a basic understanding of React and CSS.

What Is Framer Motion?

Framer Motion is an animation library that makes creating animations easy. Its simplified API helps us abstract the complexities behind animations and allows us to create animations with ease.

Motion Components

These are the building blocks of Framer motion. Motion components are created by prefixing motion to your regular HTML and SVG element (e.g, motion.h1). Motion components can accept several props, with the basic one being the animate prop. This prop takes in an object where we define the properties of that component we want to animate. The properties we define will be animated when the component mounts in the DOM.

Let’s animate an h1 text using Framer Motion. First, we install the framer-motion library and import motion.

npm i framer-motion
import { motion } from ‘framer-motion’;

Then we convert the h1 into a motion component.

<motion.h1
animate={{x: 20, y: -20}}>
This is a motion component
</motion.h1>

This will cause the h1 to slide 20px to the right and move 20px up when it loads. When units aren’t added, calculations are done using pixels. However, you can explicitly set the units you want the calculations to be based on, animate={{x: “20rem”, y: “-20rem”}}>.

By default, a motion component will be animated from the state defined from its styles to those in the animate prop. However, if we wanted to, we could hijack and define the initial animation state of the component using the initial prop. While the animate prop is used to define the behavior of components when they mount, the initial prop defines their behavior before they mount.

If we want our h1 to come in from the left, we control that using the initial prop.

<motion.h1
initial={{x: -1000}}
animate={{x: 20}}>
This is a motion component
</motion.h1>

Now, when the h1 mounts, it slides in from the left.

We are not limited to a single animation. We can define a series of animations called keyframes in an array of values. Each value will get animated in sequence.

<motion.h1
initial={{x: -1000}}
animate={{x: [20, 50, 0, -70, 40] }}>
This is a motion component
</motion.h1>

The transition prop allows us to define how the animations occur. With it, we define how values animate from one state to another. Among other things, we can define the duration, delay, and type of animation using this prop.

<motion.h1
initial={{ x: -1000 }}
animate={{ x: 0 }}
transition={{
type: “tween”,
duration: “2”,
delay: “1”
}}>
This is a motion component
</motion.h1>

Say we were to animate several motion components simultaneously, like in the code snippet below.

<div className=”App”>
<motion.h1
initial={{ x: -1000 }}
animate={{ x: 0 }}
transition={{
type: “tween”,
duration: “2”,
delay: “1”
}}>
This is a motion h1
</motion.h1>
<motion.h2
initial={{ y: -1000 }}
animate={{ y: 0 }}
transition={{
type: “tween”,
duration: “1”,
delay: “.4”
}}>This is a motion h2
</motion.h2>
<motion.h3
initial={{ x: 100, opacity: 0 }}
animate={{ x: 0, opacity: 1 }}>
This is a motion h3
</motion.h3>
<motion.h4
initial={{ scale: 0.7 }}
animate={{ scale: 1.7 }}
transition={{
type: “tween”,
duration: “2”,
delay: “1”
}}>
This is a motion h4
</motion.h4>
</div>

While this works, the variants prop in Framer Motion enables us to extract our animation definitions into a variants object. Not only do variants make our code cleaner, but they allow us to create even more powerful and complex animations.

Extracting our animation definitions into variants objects, we have this:

const H1Variants = {
initial: { x: -1000 },
animate: { x: 0 },
transition: {
type: “tween”,
duration: 2,
delay: 1
}
}
const H2Variants = {
initial: { y: -1000 },
animate: { y: 0 },
transition: {
type: “tween”,
duration: 1,
delay: .4
}
}
const H3Variants = {
initial:{ x: 100, opacity: 0 },
animate:{ x: 0, opacity: 1 }
}
const H4Variants = {
initial:{ scale: 0.7 },
animate:{ scale: 1.7 },
transition:{
type: “tween”,
duration: “2”,
delay: “1”
}
}

Instead of passing the animation definitions into a component’s initial and animate props directly, we extract these definitions into standalone variant objects. In the variant objects, we define variant names that describe each animation’s name as variants.

<div className=”App”>
<motion.h1
variants={H1Variants}
initial=’initial’
animate=’animate’
>
This is a motion h1
</motion.h1>
<motion.h2
variants={H2Variants}
initial=’initial’
animate=’animate’
>
This is a motion h2
</motion.h2>
<motion.h3
variants={H3Variants}
initial=’initial’
animate=’animate’
>
This is a motion h3
</motion.h3>
<motion.h4
variants={H4Variants}
initial=’initial’
animate=’animate’
>
This is a motion h4
</motion.h4>
</div>

In the variants prop, we pass in the name of the variant objects for each motion component and then pass in the animations to the initial and animate props.

We can take our current setup with variants further to reduce repetition. Using variants, we can propagate animation attributes down through the DOM from a parent motion component. For this to work, we create variants for the parent motion.div with similar animation names in its variant object as its children. By doing this, we won’t have to pass the animation names’ to each child component. Behind the scenes, the parent element handles that for us.

const ContainerVariants = {
initial: {},
animate: {}
};
const H1Variants = {
initial: { x: -1000 },
animate: { x: 0 },
transition: {
type: “tween”,
duration: 2,
delay: 1
}
};
//more variants below

<motion.div
className=”App”
variants={ContainerVariants}
initial=”initial”
animate=”animate”
>
<motion.h1 variants={H1Variants}>This is a motion h1</motion.h1>
<motion.h2 variants={H2Variants}>This is a motion h2</motion.h2>
<motion.h3 variants={H3Variants}>This is a motion h3</motion.h3>
<motion.h4 variants={H4Variants}>This is a motion h4</motion.h4>
</motion.div>

Now we have a cleaner code with no repetitions. We turned the container div to a motion component so we could pass in the ContainerVariants object we defined. Since we don’t define any animations on the container, we pass in empty objects to initial and animate. Your animation names must be the same in every variant object for the propagation to work.

Now we understand the basics of Framer Motion. Let’s begin building our fist of 5 demo applications.

Icon Shop

We can create interactive animations based on gestures. Motion components are currently able to listen for hover, tap, pan, and drag gesture detection. We’ll be building this Icon Shop app using the whileHover prop.

Components

App.js: this holds the heading texts.
Card.jsx: here, we define the animations for the icon cards.
CardContainer.jsx: we import and loop through the icons.
styles.js: create, style, and export the motion components. I used styled-components for styling the components.

Let’s start with App.js.

import { H1, H2 } from “./Styles”;
import CardContainer from “./CardContainer”;

return (
<div>
<H1
initial={{ y: -100 }}
animate={{ y: 0, transition: { delay: 1 } }}>
Icon Shop
</H1>
<H2
initial={{ x: -1000 }}
animate={{ x: 0, transition: { delay: 1 } }}>
Hover over the cards to see the motion magic
</H2>
<CardContainer />
</div>
);

We import the H1 and H2 motion components we created in the Styles.js file. Since they are motion components, we use the initial and animate props to define their behavior before and when they mount. Here, we also import and display the CardContiner component.

Now, the CardContainer.js.

import { Container } from “./Styles”;
import Card from “./Card”;
import { ReactComponent as AddIcon } from “./assets/add.svg”;
import { ReactComponent as AirplaneIcon } from “./assets/airplane.svg”;
import { ReactComponent as AlarmIcon } from “./assets/alarm.svg”;
//more svg imports below…

const icons = [
<AddIcon />,
<AirplaneIcon />,
<AlarmIcon />,
//more icons below
];

const CardContainer = () => {
return (
<Container initial={{ x: -1000 }} animate={{ x: 0 }}>
{icons.map((icon) => (
<Card icon={icon} />
))}
</Container>
);
};

Here, we import the SVGs, the Container motion component, and the Card component.

Similar to H1 and H2 in App.js, we define animations of the Container using the initial and animate props. When it loads, it will create a cool effect of sliding in from the left of the browser.

Now, Card.js

import { CardBox, IconBox } from “./Styles”;
const CardVariants = {
beforeHover: {},
onHover: {
scale: 1.1
}
};
const IconVariants = {
beforeHover: {
opacity: 0,
y: -50
},
onHover: {
opacity: 1,
y: 0,
scale: 1.5,
transition: {
type: “tween”
}
}
};

Here, we create two variant objects with beforeHover and onHover animations. In the CardVariants object, we don’t want to do anything initially, so beforeHover is an empty object. onHover we increase the scale of the card box.

In the IconVariants object, we define the initial state of the IconBox in its beforeHover. We set its opacity to 0 and push it upwards by 50px. Then, in onHover, we set the opacity back to 1, push it back to its default position, and change the transition type to tween. Then we pass in the variants to their respective motion components. We make use of the propagation, so we don’t need to explicitly set the initial and animate props to the IconBox component.

Animated Navbar

We’ll build a simple Navigation component, and we’ll see how we can create timing relationships between parent and children motion components.

Components

App.js: this holds the heading texts.
Styles.js: create, style, and export the motion components. The components are styled using styled-components.

Let’s take a look at the App.js file.

import { Header, Nav, Link, SvgBox } from “./Styles”;

We create an isOpen state that will be used to check if the Navbar is open or not. We create 3 variant objects, iconVariants, menuVariants, and linkVariants where we define the animations for the SvgBox, Nav, and Link motion components respectively. The iconVariants is used to rotate the SvgBox 135deg when it’s hovered over. We don’t need to add “deg” to the value. In the menuVariants, we control the top position of the Nav like you would using the position property in CSS. We toggle the top position of the Nav based on the isOpen state.

With variants, we can create timing relationships between parent and children motion components. We define the relationship between parent Nav and its child, Link using the when property in the transition object. Here, set it to beforeChildren, so the parent component’s animations will finish before the child’s animation begins.

Using the staggerChildren property, we set a timing order for each link. Each link will take 0.5 seconds to appear one after the other. This creates a nice visual cue when the Nav is opened. In the linkVariants we animate the opacity and the vertical position of each link.

<div className=”App”>
<Header>
<SvgBox
variants={iconVariants}
animate={isOpen ? “opened” : “closed”}
onClick={() => setIsOpen(!isOpen)}
>
<svg
width=”24″
height=”24″
viewBox=”0 0 24 24″
fill=”none”
xmlns=”http://www.w3.org/2000/svg”
>
<path
d=”M12 4C11.4477 4 11 4.44772 11 5V11H5C4.44772 11 4 11.4477 4 12C4 12.5523 4.44772 13 5 13H11V19C11 19.5523 11.4477 20 12 20C12.5523 20 13 19.5523 13 19V13H19C19.5523 13 20 12.5523 20 12C20 11.4477 19.5523 11 19 11H13V5C13 4.44772 12.5523 4 12 4Z”
fill=”#fff”
/>
</svg>
</SvgBox>
</Header>
<Nav
initial={false}
variants={menuVariants}
animate={isOpen ? “opened” : “closed”}
>
<Link variants={linkVariants}>home</Link>
<Link variants={linkVariants}>about</Link>
<Link variants={linkVariants}>gallery</Link>
</Nav>
</div>

Here, we pass in the variants to their respective components. In the SvgBox, we toggle the state of isOpen whenever it’s clicked, then conditionally animate it based on the state. Like the SvgBox, we conditionally animate the Nav and the Links based on isOpen’s state.

Animated Modal

We’ll build a modal component and learn about Framer Motion’s AnimatePresence, and how it allows us animate elements as they leave the DOM.

Components:

App.js: we set up the showModal state here.
Modal.jsx: the actual animation work takes place here.
Styles.js: create, style, and export the motion components. The components are styled using styled-components.

Let’s look into App.js

import { ToggleButton, Container } from “./Styles”;
import Modal from “./Modal”;

We create a showModal state that will be used to conditionally render the modal. The toggleModal function will toggle the state whenever the ToggleButton is clicked. ToggleButton is a motion component, so we can define animations for it. When it mounts, it slides in from the left. This animation runs for 0.5 seconds. We also pass in the showModal state to the Modal through props.

Now, Modal.jsx

import { AnimatePresence } from “framer-motion”;
import { ModalBox, ModalContent, Container } from “./Styles”;

<Container>
<AnimatePresence>
{showModal && (
<ModalBox
initial={{ opacity: 0, y: 60, scale: 0.3 }}
animate={{
opacity: 1,
y: 0,
scale: 1,
transition: { type: “spring”, stiffness: 300 }
}}
exit={{ opacity: 0, scale: 0.5, transition: { duration: 0.6 } }}
>
<ModalContent
initial={{ y: -30, opacity: 0 }}
animate={{ y: 0, opacity: 1, transition: { delay: 1 } }}
>
Modal content!!!!
</ModalContent>
</ModalBox>
)}
</AnimatePresence>
</Container>

We import AnimatePresence from framer-motion. It allows us to set exit animations for components when they leave DOM. We conditionally render the Modal based on the showModal state. We define the animations for the ModalBox and ModalContent through their initial and animate props. There’s also a new prop here, exit. Having AnimatePresence as a wrapper allows us to add exit animations to ModalBox in the exit prop.

Scroll Animation

We’ll use a combination of the useAnimation hook and react-intersection-observer to create scroll-triggered animations.

Components

App.js: we set up the animations for the Box component and render it in App
Styles.js: create, style, and export the motion components. The components are styled using styled-components.

import React, { useEffect } from “react”;
import { useAnimation } from “framer-motion”;
import { useInView } from “react-intersection-observer”;
import { Container, H1,StyledBox } from “./Styles”;

const BoxVariants = {
visible: { opacity: 1, x: 0, transition: { duration: 1 } },
hidden: { opacity: 0, x: 300 },
};

The useAnimation hook allows us to control the sequences in which our animations occur. We have access to controls.start and controls.stop methods that we can use to manually start and stop our animations. We pass in the initial hidden animaton to StyledBox. We pass in the controls we defined with the start method to StyledBox animate prop.

react-intersection-observer’s useInView hook allows us to track when a component is visible in the viewport. The useInView hook gives us access to ref, which we pass to the component we want to watch, and the inView boolean, that tells us if that element is inView or not. We use the useEffect to call controls.start whenever the element we’re watching, StyledBox is in view. We pass in controls and inView as useEffect’s dependencies. Also, we pass in the variants we defined, BoxVariants to StyledBox.

Hero Animation

We’ll build a cool hero banner animation using the useCycle hook. We’ll understand how useCycle allows us to cycle through animations.

import React, { useEffect } from “react”;
import { useCycle } from “framer-motion”;
import { Container, H1, HeroSection, Banner, TextBox } from “./Styles”;
import { ReactComponent as BannerIllustration } from “./bighead.svg”;

We define 3 variants, H1Variants, TextVariants, and BannerVariants. However, our focus is BannerVariants. We define 2 animations, animationOne and animationTwo in BannerVariants. These are the animations we pass into the useCycle to cycle through.

const [animation, cycleAnimation] = useCycle(“animationOne”, “animationTwo”);
useEffect(() => {
setTimeout(() => {
cycleAnimation();
}, 2000);
}, []);

useCycle works similar to the useState hook. In the destructured array, animation represents the animation that is active, whether animationOne or animationTwo. The cylceAnimation function that cycles between the animation we defined. We pass in the animations we want to cycle through into useCycle and call cylceAnimation after 2 seconds in useEffect.

<div className=”App”>
<Container>
<H1 variants={H1Variants} initial=”initial” animate=”animate”>
Cool Hero Section Anmiation
</H1>
<HeroSection>
<TextBox variants={TextVariants} initial=”initial” animate=”animate”>
Storage shed, troughs feed bale manure, is garden wheat oats at
augers. Bulls at rose garden cucumbers mice sunflower wheat in pig.
Chainsaw foal hay hook, herbs at combine harvester, children is
mallet. Goat goose hen horse. Pick up truck livestock, pets and
storage shed, troughs feed bale manure, is garden wheat oats at
augers. Lamb.
</TextBox>
<Banner variants={BannerVariants} animate={animation}>
<BannerIllustration />
</Banner>
</HeroSection>
</Container>
</div>

At the end of everything, we pass in the variants to their respective components and watch the magic happen. With this, the Banner will initially slide in from the right based on the animations we defined in animationOne, and after 2 seconds, cycleAnimation will be called which will trigger animationTwo.

As a wise Pig once said, “that’s all folks.”

Conclusion

We’ve gone through the basics of Framer Motion and seen some demo projects that give us a glimpse of the range of animations we can create. However, you can do so much more with it. I encourage you to dive into the docs and go wild.

Resources

Framer Motion Api Docs, Framer Motion
react-intersection-observer, npm
Framer Motion for React, NetNinja

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