Easing Functions Without the Framework Cruft
npm install easing| testing | coverage |
| ------- | ---------|
|  |  |
``js
const Easing = require('easing')
const x = Easing(11,'linear')
// [ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ]
const y = Easing(11,'quadratic')
// [ 0, 0.01, 0.04, 0.09, 0.16, 0.25, 0.36, 0.49, 0.64, 0.81, 1 ]
`
npm install --save easing
Simply include browser-easing.js and you can directly use the Easing function globally
`html`
const Easing = require('easing')
This is a fork of rook2pawn/node-easing with the following changes:
- Transpile source files with Babel
- Create a library build using Webpack + babel-loader
As distributed, the original project's source files, including rook2pawn/node-easing/browser-easing.js, are not valid ES5. This leads to knock-on issues, such as when bundling the library with a tool that uses UglifyJS:
Error from UglifyJS Showing "Unexpected token operator «=»" in browser-easing.js
``
js/main-ec3d69cc.js from UglifyJs
Unexpected token operator «=», expected punc «,» [../node_modules/easing/browser-easing.js:8,0][js/main-ec3d69cc.js:28118,46]
Hence, this fork transpiles the source files to valid ES5:
- The lib folder contains individual transpiled source files
- browser-easing.js, a UMD module as before, is also transpiled
For an array of 42 values that are linear,
Easing(42,'linear')
For an array of 100 values that are quadratic,
Easing(100,'quadratic')
For an array of 42 cubic values,
Easing(42,'cubic')
For an array of 1492 quartic values,
Easing(1492,'quartic')
Easing(25,'quintic')
Easing(333,'sinusoidal')
Easing(333,'sin')
Easing(314,'circular')
Easing(81,'exponential')
If we wanted to go from 0 to 1 back to 0 quadratically, simply call
Easing(100,'quadratic',{endToEnd:true});
If we want to go from 1 to 0 (or 1 to 0 back to 1) instead of 0 to 1, say 'linear' style, simply call
Easing(100,'linear',{invert:true});
You can mix and match these options.
`js`
const Easing = require('easing')
const x = Easing.event(11,'linear')
x.on('data', (data) => { ... })
js
const Easing = require('easing')
const x = Easing.stream(11,'linear')
x.pipe(process.stdout)
`These two interfaces have their own options
duration and repeat` that you can also mix and match.These two interfaces can take one or all of these options
* invert : boolean
* endToEnd : boolean
* duration : integer (milliseconds, defaults to 1000)
* repeat : boolean (default false)
MIT