@solid-primitives/spring

A small SolidJS hook to interpolate signal changes with spring physics. Inspired by & directly forked from svelte-motion/spring as such, has a very familiar API design.

With this primitive, you can easily animate values that can be interpolated like number, date, and collections (arrays or nested objects) of those datatypes.

• createSpring - Provides a getter and setter for the spring primitive.
• createDerivedSpring - Provides only a getter for the spring primitive deriving from an accessor parameter. Similar to the @solid-primitives/tween API.

The following physics options are available:

• stiffness (number, default 0.15) — a value between 0 and 1 where higher means a 'tighter' spring
• damping (number, default 0.8) — a value between 0 and 1 where lower means a 'springier' spring
• precision (number, default 0.01) — determines the threshold at which the spring is considered to have 'settled', where lower means more precise

Installation

npm install @solid-primitives/spring
# or
yarn add @solid-primitives/spring
# or
pnpm add @solid-primitives/spring

How to use it

// Basic Example
const [progress, setProgress] = createSpring(0);

// Example with options (less sudden movement)
const [radialProgress, setRadialProgress] = createSpring(0, { stiffness: 0.05 });

// Example with collections (e.g. Object or Array).
const [xy, setXY] = createSpring(
  { x: 50, y: 50 },
  { stiffness: 0.08, damping: 0.2, precision: 0.01 },
);

// Example deriving from an existing signal.
const [myNumber, myNumber] = createSignal(20);
const springedValue = createDerivedSpring(myNumber, { stiffness: 0.03 });

Demo

• Playground - source code

• CodeSandbox - Basic Example

Changelog

See CHANGELOG.md