Section 1.1: Animating Component States

Using react-spring, we can create smooth transitions for components as they appear or disappear. Here's an example of how to implement this:

import React, { useState } from "react";

import { Transition } from "react-spring/renderprops";

export default function App() {

const [show, set] = useState(false);

return (

<div>

<button onClick={() => set(!show)}>toggle</button>

<Transition

items={show}

from={{ opacity: 0 }}

enter={{ opacity: 1 }}

leave={{ opacity: 0 }}

>

{(show) =>

show &&

((props) => (

<div style={props}>

<span role="img" aria-label="smile">

😊

</span>

Hello!

</div>

))

}

</Transition>

</div>

);

}

In this code snippet, when the show state is true, the emoji and text are rendered with a fade-in effect. The from, enter, and leave properties define how the animation behaves at different stages.

Section 1.2: Utilizing Keyframes

The Keyframes component in react-spring allows you to create complex animations by chaining and composing different effects. Below is an example of how to implement keyframes:

import React from "react";

import { config, Keyframes } from "react-spring/renderprops";

const delay = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

const Container = Keyframes.Spring({

show: { opacity: 1 },

showAndHide: [{ color: "green" }, { color: "red" }],

wiggle: async (next, cancel, ownProps) => {

await next({ x: 100, config: config.wobbly });

await delay(1000);

await next({ x: 0, config: config.gentle });

}

});

export default function App() {

return (

<div>

<Container state="showAndHide">

{(styles) => <div style={styles}>Hello</div>}

</Container>

</div>

);

}

In this example, the text transitions from green to red using the showAndHide keyframe, showcasing the versatility of the Keyframes component.

The first video titled "Implementing animations with react-spring" demonstrates practical applications of react-spring for animations in React applications, providing valuable insights into its usage.

The second video, "Introduction to the React Spring library | Creating basic animations using useSpring | tutorial pt 2," offers a step-by-step tutorial on creating fundamental animations using the react-spring library.