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segmentio /evergreen

🌲 Evergreen React UI Framework by Segment

9.8K Stars 538 Forks Last release: 13 days ago (v4.28.0) MIT License 642 Commits 137 Releases

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[Evergreen, A Design System for the Web. Evergreen is a React UI Framework for building ambitious products on the web. Brought to you by Segment.

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  • Works out of the box. Evergreen contains a set of polished React components that work out of the box.

  • Flexible & composable. Evergreen components are built on top of a React UI Primitive for endless composability.

  • Enterprise-grade. Evergreen features a UI design language for enterprise-grade web applications.

Documentation & Community

Evergreen v3 to v4 Migration guide

Evergreen v3 to v4 migration guide

Install and use components

🌲 Evergreen is made up of multiple components and tools which you can import one by one. All you need to do is install the



$ yarn add evergreen-ui # or $ npm install --save evergreen-ui

A working version, assuming you are using something like Create React App, might look like this:

import React from 'react' import ReactDOM from 'react-dom' import { Button } from 'evergreen-ui' ReactDOM.render( <button>I am using 🌲 Evergreen!</button>, document.getElementById('root') )

Core values of 🌲 Evergreen

  • Evergreen is built on the belief that you can never predict all future requirements, only prepare for it. Instead of creating fixed configurations that work today, Evergreen promotes building systems that anticipate new and changing design requirements.

  • Evergreen is built on the belief that things should work out of the box with smart defaults, but also offer full control when needed. For example, Evergreen uses CSS-in-JS and builds on top of the Box component in ui-box.

  • Evergreen is built on the belief that using Evergreen and contributing to Evergreen should be a pleasant experience. We prioritize documentation and all the tools for a solid developer experience. We advocate respect and inclusivity in our writings and interactions.


Theming support?

Evergreen v4 supports theming partially. It is still complex to theme Evergreen. We have done exploratory work to make theming more powerful and accessible. The progress is available in the



See these docs for more information regarding theming in Evergreen.

How does Server Side Rendering (SSR) work?

Evergreen offers easy Server Side Rendering (SSR) and automatic hydration.

Evergreen bundles 2 CSS-in-JS solutions, from glamor and ui-box. To make it super easy to do server side rendering and hydration, Evergreen exposes a


function that will do SSR for both at once.

Contributing to Evergreen

🍴 Step 1. Fork this repository

In order to contribute to Evergreen, you need to fork this repo, and develop on your own local clone.

If you don't know how to do so, follow this guide!

πŸ“– Step 2. Get storybook up and running



into your local cloned repository and install your



$ yarn

To actually start seeing the components you have to run React Storybook with the command:

$ yarn dev

Now go to


in your browser.

πŸ›  Step 3. Make your change

Now you can start developing! All of the components are under the


directory and associated code changes will automatically be reflected in StoryBook.

If necessary, we encourage you to update the documentation so Evergreen users will be aware of your new features/changes.

In order to run the documentation page locally, run these commands in your terminal:

$ yarn build $ cd docs $ yarn install $ yarn dev

Now you can visit


in your browser.

Documentation code is under the


directory. A big portion of these docs are written in MDX, if you've never used MDX before, check out these docs.

πŸ† Step 4. Making your pull request

Once you're done with making your changes, push everything to your local repository's branch.

From here, you can open up a pull request from your forked repository's branch into





In your PR description, explain the changes you made, why you made them, how to test them, and anything that might be a point of interest.

Once you create your PR, it will be reviewed and hopefully merged quickly!

πŸ₯‚ Step 5. Pat yourself on the back

Congrats, you're officially an Evergreen contributor!

πŸ€“ Scripts explained

Inside the


there are a bunch of scripts that this repo uses to run the project in development and to build the project.

Below you can read a description of each script.

  • yarn dev

    : Starts the development React Storybook.

yarn test

: Lints the JavaScript files using XO and then runs the unit tests using AVA.

yarn build

: Builds all of the JavaScript files using Babel.

yarn clean

: removes all untracked files (

git clean -Xdf


yarn release

: Releases new version of Evergreen (requires MFA via npm as a collaborator)

yarn create-package

: This command scaffolds a package with no specific boilerplate. It's useful for creating utilities.

For the following command:

yarn create-package utils

The following file tree will be generated:

/src/utils β”œβ”€β”€ /src/ └── index.js
  • yarn create-package:components
    : This command scaffolds a package with React component(s) boilerplate.

You can pass one or more components to this command.

For the following command:

yarn create-package:components typography Text Heading

The following file tree will be generated:

/src/typography β”œβ”€β”€ /src/ | │── Text.js | └── Heading.js β”œβ”€β”€ /stories/ β”‚ └── index.stories.js └── index.js

πŸŽ‰ Contributors

We will add you to the list if you make any meaningful contribution!

  • Jeroen Ransijn
  • Roland Warmerdam
  • Ben McMahon
  • Matt Shwery
  • Chris Chuck
  • ... many other on the Segment team and open-source contributors

This project is maintained by Segment

Please take a look at the contributing guide to better understand what to work on.

πŸ‘ Respect earns Respect

Please respect our Code of Conduct, in short:

  • Using welcoming and inclusive language
  • Being respectful of differing viewpoints and experiences
  • Gracefully accepting constructive criticism
  • Focusing on what is best for the community
  • Showing empathy towards other community members


Evergreen is released under the MIT license. The BlueprintJS icons are licensed under a custom Apache 2.0 license.

Copyright Β© 2017, Inc.

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