auro-button

<auro-button> is a HTML custom element for the purpose of containing styling and behavior.

UI development browser support

For the most up to date information on UI development browser support

Install

$ npm i @alaskaairux/auro-button

Installing as a direct, dev or peer dependency is up to the user installing the package. If you are unsure as to what type of dependency you should use, consider reading this stack overflow answer.

Design Token CSS Custom Property dependency

The use of any Auro custom element has a dependency on the Auro Design Tokens.

CSS Custom Property fallbacks

CSS custom properties are not supported in older browsers. For this, fallback properties are pre-generated and included with the npm.

Any update to the Auro Design Tokens will be immediately reflected with browsers that support CSS custom properties, legacy browsers will require updated components with pre-generated fallback properties.

Define dependency in project component

Defining the component dependency within each component that is using the <auro-button> component.

import "@alaskaairux/auro-button";

Reference component in HTML

<auro-button>Hello World</auro-button>

Install bundled assets from CDN

In cases where the project is not able to process JS assets, there are pre-processed assets available for use. Two bundles are available -- auro-button__bundled.js for modern browsers and auro-button__bundled.es5.js for legacy browsers (including IE11).

Since the legacy bundle includes many polyfills that are not needed by modern browsers, we recommend you load these bundles using differential serving so that the browser only loads the bundle it needs. To accomplish this, the script tag for the modern bundle should have type="module" and the script tag for the legacy bundle should have the nomodule attribute. See the example below.

NOTE: Be sure to replace @latest in the URL with the version of the asset you want. @latest is NOT aware of any MAJOR releases, use at your own risk.

<link rel="stylesheet" href="https://unpkg.com/@alaskaairux/design-tokens@latest/dist/tokens/CSSCustomProperties.css" />
<link rel="stylesheet" href="https://unpkg.com/@alaskaairux/webcorestylesheets@latest/dist/bundled/essentials.css" />

<script src="https://unpkg.com/@alaskaairux/auro-button@latest/dist/auro-button__bundled.js" type="module"></script>
<script src="https://unpkg.com/@alaskaairux/auro-button@latest/dist/auro-button__bundled.es5.js" nomodule></script>

polyfills.js

The polyfills.js is packaged with this component, but IT IS NOT NEEDED to load a polyfill per component. The polyfills.js will work for all additional components added to the project.

IE11 Support

Displaimer: While these components are supported in IE, there may be issues with loading the web components polyfill. Please consult their documentation when supporting IE11.

Responsive support

<auro-button> is responsive by default. The button will assume 100% of the width of its container for views less than auro_breakpoint--sm.

Beyond that breakpoint <auro-button> will assume the width of the content or a min-width of 8.75rem, which ever is greater.

If the desired appearance of the <auro-button> is to be placed in the reverse direction of natural content, then the attributes of responsive and reverse are needed on the <auro-button> element.

Multi button support

When the UI requires the use of multiple buttons within the same space, with the use of the Auro Web Core Style Sheets, and the auro_containedButtons .

Light DOM Support

<auro-button-light> are included in this package for light DOM support.

To pass content to the , use the content prop.

<auro-button-light content="Default value"></auro-button-light>

Native form attribute support

The auro-button shadow DOM web component does not support all the native form attributes that a <button> element would. But the light DOM version does. These attributes require access to the full light DOM.

• form
• formaction
• formenctype
• formmethod
• formtarget
• formnovalidate

auro-button use cases

The <auro-button> element should be used in situations where users may:

• submit a form
• begin a new task
• trigger a new UI element to appear on the page
• specify a new or next step in a process

API Code Examples

Default auro-button

<auro-button>Primary</auro-button>
<auro-button disabled>Primary</auro-button>

<auro-button secondary>Secondary</auro-button>
<auro-button secondary disabled>Secondary</auro-button>

<auro-button tertiary>Tertiary</auro-button>
<auro-button tertiary disabled>Tertiary</auro-button>

Development

In order to develop against this project, if you are not part of the core team, you will be required to fork the project prior to submitting a pull request.

Please be sure to review the contribution guidelines for this project. Please make sure to pay special attention to the conventional commits section of the document.

Start development environment

Once the project has been cloned to your local resource and you have installed all the dependencies you will need to open three different shell sessions. One is for the Gulp tasks, the second is for a series of npm tasks and the last is to run the Polymer server.

Peer dependency: Please make sure Polymer is installed globally in order to run the Polymer server. See Auro Component Development Details for more information.

// shell terminal one
$ npm run dev

// shell terminal two
$ npm run serve

Open localhost:8000

Testing

Automated tests are required for every Auro component. See .\test\auro-button.test.js for the tests for this component. Run npm test to run the tests and check code coverage. Tests must pass and meet a certain coverage threshold to commit. See the testing documentation for more details.

Demo deployment

To deploy a demo version of the component for review, run npm run demo:build to create a ./build directory that can be pushed to any static server.