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Getting started for engineers

The Design Systems Team maintains design tokens, icons, and components in a monorepo and publishes them regularly to npm.

Components

We provide components as an Ember addon with associated styles written in Sass. By installing the components, you also have access to the design tokens and CSS helper classes.

Install components package

yarn add @hashicorp/design-system-components

Import component styles

You can chose between importing styles as Sass or CSS.

Sass

  1. Install and configure Sass to preprocess styles, handle source maps, and include paths in your application.
ember install ember-cli-sass

  1. Use the scss extension to ensure the styles are being preprocessed. For example, you may need to change app/styles/app.css to app/styles/app.scss.

  2. Add the following configuration in ember-cli-build.js to set the number of decimal places and enable access to the design system tokens:

sassOptions: {
  precision: 4,
  includePaths: [
    './node_modules/@hashicorp/design-system-tokens/dist/products/css',
    './node_modules/@hashicorp/ember-flight-icons/dist/styles',
    './node_modules/@hashicorp/design-system-components/dist/styles',
  ],
},
  1. We also suggest adding this configuration in ember-cli-build.js to prevent ember-cli from trying to over-optimize the generated CSS by changing the order of the CSS declarations (reference):
minifyCSS: {
  options: {
    advanced: false,
  },
},
  1. Add the following line to the main Sass file in your application (for example, in app.scss):
@import "@hashicorp/design-system-components";

CSS

Import the CSS by adding this configuration in ember-cli-build.js.

app.import('node_modules/@hashicorp/design-system-components/dist/styles/@hashicorp/design-system-components.css');
Ensure a box-sizing reset is present

Our component library assumes that a box-sizing reset is applied globally in your application. To ensure components render properly, include the following reset:

*, *::before, *::after { box-sizing: border-box; }

Icons

There are multiple ways to use icons in your codebase. We provide icons:

Ember applications

Using the Hds::Icon component

Because the Hds::Icon component is part of the HDS components, you have to install the corresponding package:

yarn add @hashicorp/design-system-components

and then use the component in your code like this:

<Hds::Icon @name="info" />

For details about how this component should be used and its API, see the component documentation page.

Using the @hashicorp/ember-flight-icons addon
Deprecated

This approach is now deprecated. Use the Hds::Icon instead.

The ember-flight-icons package is an Ember addon that provides a standalone FlightIcon component that can be used to render an icon as an <svg> HTML element.

Since it's an independent package, you have to install it first:

yarn add @hashicorp/ember-flight-icons

and then use the component in your code like this:

<FlightIcon @name="info" />

The API of the component is the same as the Hds::Icon one.

Deferred loading

In both approaches, the SVG sprite will be injected by default into your application's index.html file. If you would like this to happen later as part of your app bundle, you can set the lazyEmbed flag to true in the emberFlightIcons object in your app's config/environment.js file:

module.exports = function(environment) {
  const ENV = {
    // your other config
    ...
    emberFlightIcons: {
      lazyEmbed: true,
    },
  };
}

For more information on why this may be helpful in certain scenarios, see DS-049 - Improve Ember Flight Icons Loading Performance.

Ember test selectors

Both the Hds::Icon and the FlightIcon components expose a data-test-icon helper. For this reason, we recommend installing ember-test-selectors which strips out all data-test-* attributes for production builds.

Using the icons without importing the whole components package

If you want to use the Flight icons without installing the whole @hashicorp/design-system-components package, you have to use the @hashicorp/flight-icons to import the SVG sprite, and then you will have to build your own Ember component that renders the icons as an <svg> HTML element.

You can copy the code for the Hds::Icon into your codebase, or you can take inspiration from this PR to build your own component.

React applications

To add icons to a React application, you need to install the @hashicorp/flight-icons package:

yarn add @hashicorp/flight-icons

This package can be consumed in React applications via direct import of the SVG file or as a standalone React/SVG icon component.

Importing icons as inline SVGs

Single icons can be imported and used directly as SVG files using <InlineSvg> provided by @hashicorp/react-components.

Since this is just an SVG asset, no props can be passed. You should refer to the <InlineSvg> documentation to know how to apply color and size to the SVG icon.

// import the SVG file (using 'require')
const iconArrowRight = require('@hashicorp/flight-icons/svg/arrow-right-24.svg?include');
// or import the SVG file (using 'import')
import iconArrowRight from '@hashicorp/flight-icons/svg/arrow-right-24.svg?include';

// elsewhere in the file
<InlineSvg src={iconArrowRight} />

// alternatively you can also use a similar approach
<InlineSvg src={require('@hashicorp/flight-icons/svg/arrow-right-24.svg?include')} />

Importing icons as React/SVG components

Single icons can be imported and used directly as standalone React/SVG components:

// import the React/TypeScript file (using 'require')
const { IconArrowRight24 } = require('@hashicorp/flight-icons/svg-react/arrow-right-24');
// or import the React/TypeScript file (using 'import')
import { IconArrowRight24 } from '@hashicorp/flight-icons/svg-react/arrow-right-24';

// elsewhere in the file
<IconArrowRight24 />

Animated icons

To use the icons which are meant to be animated (loading and running), import the CSS that controls the icons’ animation:

// the path here depends if you’re using 'svg-react' or 'svg' icons
@import ~@hashicorp/flight-icons/svg-react/animation.css';

Then declare them the same way you would with any other icon.

// if you’re using the 'svg-react' icons
import { IconLoading16 } from '@hashicorp/flight-icons/svg-react/loading-16'
<IconLoading16 />

// if you’re using the 'svg' icons
import svgLoading16 from '@hashicorp/flight-icons/svg/loading-16.svg?include'
<InlineSvg src={svgLoading16} />

If you need the non-animated version of these icons, use the corresponding loading-static and running-static:

Tokens

If the Ember components are not an option for your project, you can still use the design tokens to keep in sync with the styles we provide.

Install tokens package

yarn add @hashicorp/design-system-tokens

Import styles as CSS variables

Import design tokens as CSS variables by adding one of the following lines to the main Sass file in your application (for example, in app.scss):

// for product applications (Ember apps)
@import "@hashicorp/design-system-tokens/dist/products/css/tokens.css";

// for HashiCorp developer platform
@import "~@hashicorp/design-system-tokens/dist/devdot/css/tokens.css";

Import styles as CSS helper classes

Import CSS helper classes by adding any of the following lines to the main Sass file in your application (for example, in app.scss).

// for product applications (Ember apps)
@import "@hashicorp/design-system-tokens/dist/products/css/helpers/colors.css";
@import "@hashicorp/design-system-tokens/dist/products/css/helpers/elevation.css";
@import "@hashicorp/design-system-tokens/dist/products/css/helpers/typography.css";
@import "@hashicorp/design-system-tokens/dist/products/css/helpers/focus-ring.css";

// for HashiCorp developer platform
@import "~@hashicorp/design-system-tokens/dist/devdot/css/helpers/colors.css";
@import "~@hashicorp/design-system-tokens/dist/devdot/css/helpers/elevation.css";
@import "~@hashicorp/design-system-tokens/dist/devdot/css/helpers/typography.css";
@import "~@hashicorp/design-system-tokens/dist/devdot/css/helpers/focus-ring.css";

For more examples and guidelines read the tokens documentation.

Browser support

Our styles, components and icons are supported by the following browsers:

Browser Version
Chrome last 2 versions
Safari last 2 versions
Firefox last 2 versions
Microsoft Edge last 2 versions

Code editor setup

VSCode

We recommend installing the Ember Language Server extension that provides autocomplete, goto definition, and diagnostics for Ember applications and addons, including Helios components.

If you use TypeScript in your Ember application, we also recommend installing the Glint extension that provides improved autocomplete and quick info for components (including arguments), as well as symbol renaming and finding references. We are in the process of converting our components to TypeScript so currently only some of them benefit from these features.

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