lion/packages/textarea

Textarea

lion-textarea is a webcomponent that enhances the functionality of the native <input type="textarea"> element. Its purpose is to provide a way for users to write text that is multiple lines long.

import { html } from 'lit-html';
import { MaxLength, MinLength, Required } from '@lion/form-core';
import { loadDefaultFeedbackMessages } from '@lion/validate-messages';

import './lion-textarea.js';

export default {
  title: 'Forms/Textarea',
};

loadDefaultFeedbackMessages();

export const main = () => html`
  <lion-textarea label="Stops growing after 4 rows" max-rows="4"></lion-textarea>
`;

Features

• Default rows is 2 and it will grow to max-rows of 6.
• max-rows attribute to set the amount of rows it should resize to, before it will scroll
• rows attribute to set the minimum amount of rows
• readonly attribute to prevent changing the content

How to use

Installation

npm i --save @lion/textarea

import { LionTextare } from '@lion/textarea';
// or
import '@lion/textarea/lion-textarea.js';

Examples

Prefilled

You can prefill the textarea. If you want to prefill on multiline, you will have to add newline characters '\n'.

export const prefilled = () => html`
  <lion-textarea
    label="Prefilled"
    .modelValue=${['batman', 'and', 'robin'].join('\n')}
  ></lion-textarea>
`;

Disabled

The textarea can be disabled with the disabled attribute.

export const disabled = () => html` <lion-textarea label="Disabled" disabled></lion-textarea> `;

Readonly

readonly attribute indicate that you can't change the content. Compared with disabled attribute, the readonly attribute doesn't prevent clicking or selecting the element.

export const readonly = () => html`
  <lion-textarea
    label="Readonly"
    readonly
    .modelValue=${['batman', 'and', 'robin'].join('\n')}
  ></lion-textarea>
`;

Stop growing

Use the max-rows attribute to make it stop growing after a certain amount of lines.

export const stopGrowing = () => html`
  <lion-textarea
    label="Stop growing"
    max-rows="4"
    .modelValue=${['batman', 'and', 'robin'].join('\n')}
  ></lion-textarea>
`;

Non-growing

To have a fixed size provide rows and max-rows with the same value.

export const nonGrowing = () => html`
  <lion-textarea label="Non Growing" rows="3" max-rows="3"></lion-textarea>
`;

Validation

The textarea can have validation.

export const validation = () => {
  return html`
    <lion-textarea
      .validators="${[new Required(), new MinLength(10), new MaxLength(400)]}"
      label="String"
      .modelValue="${'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'}"
    ></lion-textarea>
  `;
};