@popmotion/popcorn

What is @popmotion/popcorn?

@popmotion/popcorn is a collection of utility functions for creating animations and handling various types of motion in JavaScript. It provides a range of tools for easing, interpolation, and other motion-related calculations.

What are @popmotion/popcorn's main functionalities?

Easing Functions

Easing functions are used to create smooth transitions between values. @popmotion/popcorn provides several easing functions like easeIn, easeOut, and easeInOut to help create natural motion effects.

const { easeIn, easeOut, easeInOut } = require('@popmotion/popcorn');

const start = 0;
const end = 100;
const progress = 0.5;

console.log(easeIn(progress) * (end - start) + start); // Ease-in calculation
console.log(easeOut(progress) * (end - start) + start); // Ease-out calculation
console.log(easeInOut(progress) * (end - start) + start); // Ease-in-out calculation

Interpolation

Interpolation allows you to map a range of input values to a range of output values. This is useful for creating animations that need to transition between different states.

const { interpolate } = require('@popmotion/popcorn');

const inputRange = [0, 1];
const outputRange = [0, 100];
const interpolator = interpolate(inputRange, outputRange);

console.log(interpolator(0.5)); // Interpolates to 50

Spring Calculations

Spring calculations simulate the physics of a spring, providing a natural and dynamic way to animate elements. The spring function takes a configuration object and returns a function that calculates the spring value at a given progress.

const { spring } = require('@popmotion/popcorn');

const springConfig = { stiffness: 100, damping: 10, mass: 1 };
const springValue = spring(springConfig);

console.log(springValue(0.5)); // Calculates spring value at progress 0.5

Other packages similar to @popmotion/popcorn

animejs

Anime.js is a lightweight JavaScript animation library with a simple, yet powerful API. It supports various types of animations including CSS properties, SVG, DOM attributes, and JavaScript objects. Compared to @popmotion/popcorn, Anime.js offers a more comprehensive set of animation features but may be more complex to use for simple motion calculations.

gsap

GSAP (GreenSock Animation Platform) is a robust JavaScript library for high-performance animations. It provides a wide range of features including timeline management, easing functions, and plugins for various types of animations. GSAP is more feature-rich and versatile compared to @popmotion/popcorn, making it suitable for complex animation sequences.

tweenjs

Tween.js is a simple tweening engine for JavaScript. It provides basic tweening functionalities to animate properties of objects over time. While it is less feature-rich than @popmotion/popcorn, it is straightforward and easy to use for basic animations.

README

Popcorn

Popcorn is a collection of utility functions for UI developers and animators.

Full documentation