Chi is Lumen's design system for building consistent digital products and experiences.
Integrating Chi with your project is as simple as loading the Chi stylesheet from the Lumen Assets Server. Not only is this a great way to get started with Chi, it is also a highly available and performant option for loading the required assets into your project.
Begin by adding the Chi stylesheet to your project's layout template, replacing VERSION with the most recent release of Chi:
<link rel="stylesheet" href="https://assets.ctl.io/chi/VERSION/chi.css">Next, add the chi CSS class to the <html> tag of your document to properly scope the styles. This allows Chi to override any existing styles that have been defined by legacy markup.
<!DOCTYPE html>
<html class="chi">
...
</html>At this point you will be able to target the styles available in Chi by referencing its documentation.
Set up your Chi development environment with Docker. First make sure you have Docker installed, then run the command:
$ scripts/docker.sh alias
$ source ~/.bash_profileNow your environment is set up. To start development run:
$ chi startOnce the container has been bootstrapped and the Chi project has started, connect to http://localhost:8000 in your browser to load Chi. While running, any changes to the Chi source will automatically be reloaded in your browser.
The project has been configured to run inside a Docker container so it won't work as a regular node application.
We use BackstopJS for visual regression testing of our CSS components. In order to account for differences in development environments we always run these tests in a consistent Docker container. To execute the test suite, run the following command:
$ chi testA report containing the results of the test will be created under reports/html_report. If there were failures, you will need to visually examine the changes and act appropriately based on the anticipated results.
If you receive a test failure and you've made changes that you know are correct, you will need to override the test references with your new changes by running the approve command on BackstopJS:
$ chi approveOnce you have approved the changes, commit the new reference files with your changes.
Use the build command to make a ready-to-production build:
$ chi buildChi and its documentation are released under the terms of the MIT license.
In addition, Chi uses several 3rd-party libraries, a list of which can be viewed in the package.json file. Please review each of their license and user agreements, as well.
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