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ReactJS Animation

The ReactJS, you can implement animations using CSS transitions and animations, or by utilizing third-party animation libraries. Here, I’ll outline both approaches:

1. CSS Transitions and Animations:

You can use CSS transitions and animations to create simple animations in React. Here’s an example of a fade-in animation:

TypeScript
import React, { useState } from 'react';
import './App.css';

function App() {
  const [show, setShow] = useState(false);

  return (
    <div>
      <button onClick={() => setShow(!show)}>Toggle Animation</button>
      {show && <div className="fade-in">Hello, I'm animated!</div>}
    </div>
  );
}

export default App;

In your CSS file (App.css in this example), define the animation:

CSS
.fade-in {
  opacity: 0;
  animation: fadeIn 1s ease-in forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

This example uses the CSS @keyframes rule to define a simple fade-in animation. When the component is rendered and the show state is true, the element with the class fade-in will fade in.

2. React Transition Group:

React Transition Group is a popular library for managing animations in React. It provides a set of components that help you create complex animations with ease.

To get started, you’ll need to install the library:

Bash
npm install react-transition-group
# or
yarn add react-transition-group

Here’s an example of how to use React Transition Group:

TypeScript
import React, { useState } from 'react';
import { CSSTransition } from 'react-transition-group';
import './App.css';

function App() {
  const [show, setShow] = useState(false);

  return (
    <div>
      <button onClick={() => setShow(!show)}>Toggle Animation</button>
      <CSSTransition
        in={show}
        timeout={300}
        classNames="fade"
        unmountOnExit
      >
        <div className="fade-in">Hello, I'm animated!</div>
      </CSSTransition>
    </div>
  );
}

export default App;

In this example, we’re using the CSSTransition component from React Transition Group. It takes a few props:

  • in: Specifies whether the component should be displayed or not.
  • timeout: Duration of the animation in milliseconds.
  • classNames: Prefix for the CSS classes (e.g., fade-enter, fade-enter-active, fade-exit, fade-exit-active).
  • unmountOnExit: If true, the component will be unmounted when it’s not in the in state.

In your CSS, you’ll define the animations:

CSS
.fade-enter {
  opacity: 0;
}

.fade-enter-active {
  opacity: 1;
  transition: opacity 300ms;
}

.fade-exit {
  opacity: 1;
}

.fade-exit-active {
  opacity: 0;
  transition: opacity 300ms;
}

These are just a couple of ways to handle animations in React. Depending on your specific needs and preferences, you can choose between CSS-based animations or utilize third-party libraries like React Transition Group or other animation libraries like GSAP.

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