178 lines
21 KiB
Markdown
178 lines
21 KiB
Markdown
# Lion Web Components
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```js script
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export default {
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title: 'Intro/Lion Web Components',
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};
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```
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Lion web components is a set of highly performant, accessible and flexible Web Components.
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They provide an unopinionated, white label layer that can be extended to your own layer of components.
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For some more details see the [announcement blog post](https://medium.com/ing-blog/ing-open-sources-lion-a-library-for-performant-accessible-flexible-web-components-22ad165b1d3d).
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[](https://www.tickgit.com/browse?repo=github.com/ing-bank/lion)
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## Demos
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We do have a [live Storybook](http://lion-web-components.netlify.com) which shows all our components.
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**Please note:** This project uses Yarn [Workspaces](https://classic.yarnpkg.com/en/docs/workspaces). If you want to run all demos locally you need to get [Yarn](https://classic.yarnpkg.com/en/docs/install) and install all dependencies by executing `yarn install`.
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The code examples make use of [Javascript tagged template literals](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals) which are a key component of the [lit-html engine](https://lit-html.polymer-project.org/) used in Lion.
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Additionally imports like `import '@lion/form/lion-form.js'` need to be transformed somehow, for example by [es-dev-server](https://open-wc.org/developing/es-dev-server.html#node-resolve).
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## Features
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- pure es modules
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- exposes functions/classes and web components
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- provides pure functionality
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- fully accessible
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- built to be extended
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> Note: These demos may look a little bland but that is on purpose. They only come with functional stylings.
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> This makes sense as the main use case is to extend those components and if you do you do not want to override existing stylings.
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## Content
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Lion web components is logically organized in groups of systems.
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The accessibility column indicates whether the functionality is accessible in its core. Aspects like styling and content determine actual accessibility in usage.
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| Package | Version | Description | Accessibility |
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| ------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- | -------------------------- |
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| **-- [Form System](https://lion-web-components.netlify.app/?path=/docs/forms-intro--page) --** | | A system that lets you make complex forms with ease, including: validation, translations. | ✔️ |
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| [form](https://lion-web-components.netlify.app/?path=/docs/forms-form-overview--main) | [](https://www.npmjs.com/package/@lion/form) | Wrapper for multiple form elements | ✔️ |
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| [form-core](https://lion-web-components.netlify.app/?path=/docs/forms-system-overview--page) | [](https://www.npmjs.com/package/@lion/form-core) | Core functionality for all form controls | ✔️ |
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| [form-integrations](https://lion-web-components.netlify.app/?path=/docs/forms-features-overview--main) | [](https://www.npmjs.com/package/@lion/form-integrations) | Shows form elements in an integrated way | ✔️ |
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| [fieldset](https://lion-web-components.netlify.app/?path=/docs/forms-fieldset-overview--main) | [](https://www.npmjs.com/package/@lion/fieldset) | Group for form inputs | ✔️ |
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| [checkbox-group](https://lion-web-components.netlify.app/?path=/docs/forms-checkbox-group--main) | [](https://www.npmjs.com/package/@lion/checkbox-group) | Group of checkboxes | ✔️ |
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| [input](https://lion-web-components.netlify.app/?path=/docs/forms-input--main) | [](https://www.npmjs.com/package/@lion/input) | Input element for strings | ✔️ |
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| [input-amount](https://lion-web-components.netlify.app/?path=/docs/forms-input-amount--main) | [](https://www.npmjs.com/package/@lion/input-amount) | Input element for amounts | ✔️ |
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| [input-date](https://lion-web-components.netlify.app/?path=/docs/forms-input-date--main) | [](https://www.npmjs.com/package/@lion/input-date) | Input element for dates | ✔️ |
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| [input-datepicker](https://lion-web-components.netlify.app/?path=/docs/forms-input-datepicker--main) | [](https://www.npmjs.com/package/@lion/input-datepicker) | Input element for dates with a datepicker | ✔️ |
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| [input-email](https://lion-web-components.netlify.app/?path=/docs/forms-input-email--main) | [](https://www.npmjs.com/package/@lion/input-email) | Input element for e-mails | ✔️ |
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| [input-iban](https://lion-web-components.netlify.app/?path=/docs/forms-input-iban--main) | [](https://www.npmjs.com/package/@lion/input-iban) | Input element for IBANs | ✔️ |
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| [input-range](https://lion-web-components.netlify.app/?path=/docs/forms-input-range--main) | [](https://www.npmjs.com/package/@lion/input-range) | Input element for a range of values | ✔️ |
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| [input-stepper](https://lion-web-components.netlify.app/?path=/docs/forms-input-stepper--main) | [](https://www.npmjs.com/package/@lion/input-stepper) | Input stepper element for the predefined range | ✔️ |
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| [radio-group](https://lion-web-components.netlify.app/?path=/docs/forms-radio-group--main) | [](https://www.npmjs.com/package/@lion/radio-group) | Group of radios | ✔️ |
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| [select](https://lion-web-components.netlify.app/?path=/docs/forms-select--main) | [](https://www.npmjs.com/package/@lion/select) | Simple native dropdown element | ✔️ |
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| [select-rich](https://lion-web-components.netlify.app/?path=/docs/forms-select-rich--main) | [](https://www.npmjs.com/package/@lion/select-rich) | 'rich' version of the native dropdown element | [#243][i243] |
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| [textarea](https://lion-web-components.netlify.app/?path=/docs/forms-textarea--main) | [](https://www.npmjs.com/package/@lion/textarea) | Multiline text input | ✔️ |
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| **-- [Button System](https://lion-web-components.netlify.app/?path=/docs/buttons-intro--page) --** | | These web components bring common UX patterns while still full integrated with (native) forms. | |
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| [button](https://lion-web-components.netlify.app/?path=/docs/buttons-button--main) | [](https://www.npmjs.com/package/@lion/button) | Button | ✔️ |
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| [switch](https://lion-web-components.netlify.app/?path=/docs/buttons-switch--main) | [](https://www.npmjs.com/package/@lion/switch) | Switch | ✔️ |
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| **-- [Overlay System](https://lion-web-components.netlify.app/?path=/docs/overlays-intro--page) --** | | If something needs to overlay content this is your place. | |
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| [overlays](https://lion-web-components.netlify.app/?path=/docs/overlays-system-overview--main) | [](https://www.npmjs.com/package/@lion/overlays) | Overlay System | ✔️ |
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| [dialog](https://lion-web-components.netlify.app/?path=/docs/overlays-dialog--main) | [](https://www.npmjs.com/package/@lion/dialog) | Dialog element | ✔️ |
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| [tooltip](https://lion-web-components.netlify.app/?path=/docs/overlays-tooltip--main) | [](https://www.npmjs.com/package/@lion/tooltip) | Tooltip element | [#175][i175] |
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| **-- [Navigation System](https://lion-web-components.netlify.app/?path=/docs/navigation-intro--page) --** | | Components which are used to guide users | |
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| [accordion](https://lion-web-components.netlify.app/?path=/docs/navigation-accordion--main) | [](https://www.npmjs.com/package/@lion/accordion) | Accordion | ✔️ |
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| [pagination](https://lion-web-components.netlify.app/?path=/docs/navigation-pagination--main) | [](https://www.npmjs.com/package/@lion/pagination) | Pagination | ✔️ |
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| [steps](https://lion-web-components.netlify.app/?path=/docs/navigation-steps--main) | [](https://www.npmjs.com/package/@lion/steps) | Multi Step System | n/a |
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| [tabs](https://lion-web-components.netlify.app/?path=/docs/navigation-tabs--main) | [](https://www.npmjs.com/package/@lion/tabs) | Move between a small number of equally important views | n/a |
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| **-- [localize System](https://lion-web-components.netlify.app/?path=/docs/localize-intro--page) --** | | Localize text, numbers, dates and a way to store/fetch these data. | |
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| [localize](https://lion-web-components.netlify.app/?path=/docs/localize-intro--page) | [](https://www.npmjs.com/package/@lion/localize) | Localize and translate your application/components | n/a |
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| **-- [Icon System](https://lion-web-components.netlify.app/?path=/docs/icons-intro--page) --** | | Loading and displaying icons | |
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| [icon](https://lion-web-components.netlify.app/?path=/docs/icons-icon--main) | [](https://www.npmjs.com/package/@lion/icon) | Display our svg icons | [#173][i173], [#172][i172] |
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| **-- [Others](https://lion-web-components.netlify.app/?path=/docs/others-intro--page) --** | | Features not fitting any other category | |
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| [core](https://lion-web-components.netlify.app/?path=/docs/others-system-core--page) | [](https://www.npmjs.com/package/@lion/core) | Core System (exports LitElement, lit-html) | n/a |
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| [ajax](https://lion-web-components.netlify.app/?path=/docs/others-ajax--performing-get-requests) | [](https://www.npmjs.com/package/@lion/ajax) | Fetching data via ajax request | n/a |
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| [calendar](https://lion-web-components.netlify.app/?path=/docs/others-calendar--main) | [](https://www.npmjs.com/package/@lion/calendar) | Standalone calendar | [#195][i195], [#194][i194] |
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| [collapsible](https://lion-web-components.netlify.app/?path=/docs/others-collapsible--main) | [](https://www.npmjs.com/package/@lion/collapsible) | Combination of a button and a chunk of extra content | ✔️ |
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| **-- [Helpers](https://lion-web-components.netlify.app/?path=/docs/helpers-intro--page) --** | [](https://www.npmjs.com/package/@lion/helpers) | Helpers to make your and your life easier | |
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| [sb-action-logger](https://lion-web-components.netlify.app/?path=/docs/helpers-storybook-action-logger--main) | | Storybook action logger |
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## How to install
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```bash
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npm i @lion/<package-name>
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```
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## How to use
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### Use a Web Component
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```html
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<script type="module">
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import '@lion/input/lion-input.js';
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</script>
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<lion-input name="firstName"></lion-input>
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```
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### Use a JavaScript system
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```html
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<script type="module">
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import { ajax } from '@lion/ajax';
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ajax.get('data.json').then(response => {
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// most likely you will use response.data
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});
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</script>
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```
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### Extend a Web Component
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```js
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import { LionInput } from '@lion/input';
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class MyInput extends LionInput {}
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customElements.define('my-input', MyInput);
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```
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## Key Features
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- High Performance - Focused on great performance in all relevant browsers with a minimal number of dependencies
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- Accessibility - Aimed at compliance with the WCAG 2.0 AA standard to create components that are accessible for everybody
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- Flexibility - Provides solutions through Web Components and JavaScript classes which can be used, adopted and extended to fit all needs
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## Technologies
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Lion Web Components aims to be future proof and use well-supported proven technology. The stack we have chosen should reflect this.
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- [lit-html](https://lit-html.polymer-project.org) and [lit-element](https://lit-element.polymer-project.org)
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- [npm](http://npmjs.com)
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- [yarn](https://yarnpkg.com)
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- [open-wc](https://open-wc.org)
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- [Karma](https://karma-runner.github.io)
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- [Mocha](https://mochajs.org)
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- [Chai](https://www.chaijs.com)
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- [ESLint](https://eslint.org)
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- [prettier](https://prettier.io)
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- [Storybook](https://storybook.js.org)
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- [ES modules](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import)
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- Lots and lots of tests
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## Rationale
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We know from experience that making high quality, accessible UI components is hard and time consuming:
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it takes many iterations, a lot of development time and a lot of testing to get a generic component that works in every
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context, supports many edge cases and is accessible in all relevant screen readers.
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Lion aims to do the heavy lifting for you.
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This means you only have to apply your own Design System: by delivering styles, configuring components and adding a minimal set of custom logic on top.
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## Coding guidelines
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Check out our [coding guidelines](https://lion-web-components.netlify.app/?path=/docs/guidelines-intro--page) for more detailed information.
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## How to contribute
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Lion Web Components are only as good as its contributions.
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Read our [contribution guide](https://github.com/ing-bank/lion/blob/master/CONTRIBUTING.md) and feel free to enhance/improve Lion. We keep feature requests closed while we're not working on them.
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## Contact
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Feel free to create a github issue for any feedback or questions you might have.
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You can also find us on the Polymer slack in the [#lion](https://polymer.slack.com/messages/CJGFWJN9J/convo/CE6D9DN05-1557486154.187100/) channel.
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You can join the Polymer slack by visiting [https://www.polymer-project.org/slack-invite](https://www.polymer-project.org/slack-invite).
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[i172]: https://github.com/ing-bank/lion/issues/172
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[i173]: https://github.com/ing-bank/lion/issues/173
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[i175]: https://github.com/ing-bank/lion/issues/175
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[i194]: https://github.com/ing-bank/lion/issues/194
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[i195]: https://github.com/ing-bank/lion/issues/195
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[i243]: https://github.com/ing-bank/lion/issues/243
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