lion/packages/fieldset/README.md
2020-06-08 17:39:29 +02:00

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# Fieldset
`lion-fieldset` groups multiple input fields or other fieldsets together.
```js script
import { html } from 'lit-html';
import '@lion/input/lion-input.js';
import { localize } from '@lion/localize';
import { loadDefaultFeedbackMessages } from '@lion/validate-messages';
import { MinLength, Validator, Required } from '@lion/form-core';
import './lion-fieldset.js';
import './docs/helpers/demo-fieldset-child.js';
export default {
title: 'Forms/Fieldset/Overview',
};
```
We have three specific fieldset implementations:
- [lion-form](?path=/docs/forms-form-overview--main)
- [lion-checkbox-group](?path=/docs/forms-checkbox-group--main)
- [lion-radio-group](?path=/docs/forms-radio-group--main)
```js story
export const main = () => html`
<lion-fieldset name="nameGroup" label="Name">
<lion-input name="FirstName" label="First Name"></lion-input>
<lion-input name="LastName" label="Last Name"></lion-input>
</lion-fieldset>
`;
```
A native fieldset element should always have a legend-element for a11y purposes.
However, our fieldset element is not native and should not have a legend-element.
Our fieldset instead has a label attribute or you can add a label with a div- or heading-element using `slot="label"`.
## Features
- Easy retrieval of form data based on field names
- Advanced user interaction scenarios via [interaction states](?path=/docs/forms-system-interaction-states--interaction-states)
- Can have [validate](?path=/docs/forms-validation-overview--main#validate) on fieldset level and shows the validation feedback below the fieldset
- Can disable input fields on fieldset level
- Accessible out of the box
## How to use
### Installation
```bash
npm i --save @lion/fieldset
```
```js
import { LionFieldset } from '@lion/fieldset';
// or
import '@lion/fieldset/lion-fieldset.js';
```
### Example
```html
<lion-fieldset name="personalia" label="personalia">
<lion-input name="title" label="Title"></lion-input>
</lion-fieldset>
```
For more examples please look at [Fieldset Examples](?path=/docs/forms-fieldset-examples--data#fieldset-examples).