@lion/input-range/docs/use-cases.md

Provide a way for users to select one value from a range of values

# Input Range >> Use Cases ||20

```js script
import { html } from '@mdjs/mdjs-preview';
import '@lion/input-range/define';
```

## Units

```js preview-story
export const units = () => html`
  <style>
    lion-input-range {
      max-width: 400px;
    }
  </style>
  <lion-input-range
    min="0"
    max="100"
    .modelValue="${50}"
    unit="%"
    label="Percentage"
  ></lion-input-range>
`;
```

## Steps

```js preview-story
export const steps = () => html`
  <lion-input-range
    style="max-width: 400px;"
    min="200"
    max="500"
    step="50"
    .modelValue="${300}"
    label="Input range"
    help-text="This slider uses increments of 50"
  ></lion-input-range>
`;
```

## Without Min Max Labels

```js preview-story
export const noMinMaxLabels = () => html`
  <lion-input-range
    style="max-width: 400px;"
    no-min-max-labels
    min="0"
    max="100"
    label="Input range"
  ></lion-input-range>
`;
```

## Disabled

```js preview-story
export const disabled = () => html`
  <lion-input-range
    style="max-width: 400px;"
    disabled
    min="200"
    max="500"
    .modelValue="${300}"
    label="Input range"
  ></lion-input-range>
`;
```

## Range Styles

Often, you will style your own range input by changing the pseudo-elements for the slider track and thumb.

These pseudo-elements do not play nice with `::slotted`.

As per [specification](https://drafts.csswg.org/css-scoping/#slotted-pseudo):

> The ::slotted() pseudo-element can be followed by a tree-abiding pseudo-element,
> like ::slotted()::before, representing the appropriate pseudo-element of the elements
> represented by the ::slotted() pseudo-element.

The pseudo-elements associated with the slider track/thumb are not tree-abiding, so you can't do:

```css
::slotted(.form-control)::-webkit-slider-runnable-track
```

This means you will need to style the slotted native input from the LightDOM,
and for this we added added our ScopedStylesController as a controller to `LionInputRange`.
This controller inserts a `<style>` element
that emulates scoping by generating a uniquely generated class on the LionInputRange component.
This prevents the styling from conflicting with other elements on the page.

To use it when extending, override `static scopedStyles(scope)`:

```js
class MyInputRange extends LionInputRange {
  static scopedStyles(scope) {
    return css`
      .${scope} .form-control::-webkit-slider-runnable-track {
        background-color: lightgreen;
      }
    `;
  }
}
```