Visualize software behavior with intelligent sampling
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Build Status

Tastes is a Javascript library for visualizing software behavior using intelligent sampling.

Useful for navigating and refining the space of possibilities for your data, code, and ideas. The salt n' pepper to your:

  • React component development
  • Interactive documentation
  • Property-based testing
  • Generative designs in Sketch


yarn add tastes # or npm install tastes --save

A Quick Bite

Let's use Tastes to prototype different versions of a minimal poster.

Code on Runkit

// 1. Define the variables we want to play with
import { integer, record } from 'tastes'

const hue = integer({ min: 0, max: 360 })
const poster = record({
  fgHue: hue,
  bgHue: hue,
  headerPt: integer({ min: 20, max: 32 }),
  bodyPt: integer({ min: 12, max: 20 }),

// 2. We can checkout the specific poster design at
//    `(0.4, 0.2, 0.75, 0)` in the sample space.
console.log(poster([0.4, 0.2, 0.75, 0]))

// 3. But that's too manual. Let's just ask for 30 random
//    sample poster designs.
import { sampleRandom, take } from 'tastes'

for (const s of take(30, sampleRandom(poster))) {

// 4. But random designs may not be the best examples.
//    Let's check out carefully selected "representative"
//    samples instead.
import { sampleBatch } from 'tastes'

// Use detail of order 3
for (const s of sampleBatch(poster, 3)) {
  // `console.log` is used in abscence of
  // a proper rendering function


Generative Designs in Sketch

Want to see your design in many fonts, colors, content, styles, and layouts? Tastes and React Sketchapp have got you!

Example Code

Sketch example


Use React Storybook to offer interactive documentation and generated examples!

Example Code

Storybook example

React Development

Visually test your app as you code with live tweaking.

Example Code

React example

Random Values

Use with Math.random to get unpredictable values:

import { real, record } from 'tastes'

const position = record({
  lat: real({ min: -90, max: 90 }),
  lng: real({ min: -180, max: 180 }),

const randomPosition = position([Math.random(), Math.random()])

Why Not Random?

  • Not random. Generates deterministic sample data from numbers. Give the same number; get the same data.
  • Preserves locality. Give it closer numbers? Get similar data. Give it numbers further apart? Get different data.

This added control makes it a great foundation for advanced development and testing tools.

Future Goals

  • Recursive data
    • State transition trees
    • Time series data
    • Graphs
    • Lists
  • Custom probability distributions
  • Plug n' play for prop-types
  • Debugging tools
    • Hilbert curve of examples
    • Transition trees