nebula/docs/pages/components/rating.md

meta	layout
title description Rating Ratings give users a way to quickly view and provide feedback.	component

<sl-rating label="Rating"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" />;

Examples

Labels

Ratings are commonly identified contextually, so labels aren't displayed. However, you should always provide one for assistive devices using the label attribute.

<sl-rating label="Rate this component"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rate this component" />;

Maximum Value

Ratings are 0-5 by default. To change the maximum possible value, use the max attribute.

<sl-rating label="Rating" max="3"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" max={3} />;

Precision

Use the precision attribute to let users select fractional ratings.

<sl-rating label="Rating" precision="0.5" value="2.5"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" precision={0.5} value={2.5} />;

Symbol Sizes

Set the --symbol-size custom property to adjust the size.

<sl-rating label="Rating" style="--symbol-size: 2rem;"></sl-rating>

{% raw %}

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" style={{ '--symbol-size': '2rem' }} />;

{% endraw %}

Readonly

Use the readonly attribute to display a rating that users can't change.

<sl-rating label="Rating" readonly value="3"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" readonly value={3} />;

Disabled

Use the disable attribute to disable the rating.

<sl-rating label="Rating" disabled value="3"></sl-rating>

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => <SlRating label="Rating" disabled value={3} />;

Detecting Hover

Use the sl-hover event to detect when the user hovers over (or touch and drag) the rating. This lets you hook into values as the user interacts with the rating, but before they select a value.

The event has a payload with phase and value properties. The phase property tells when hovering starts, moves to a new value, and ends. The value property tells what the rating's value would be if the user were to commit to the hovered value.

<div class="detect-hover">
  <sl-rating label="Rating"></sl-rating>
  <span></span>
</div>

<script>
  const rating = document.querySelector('.detect-hover > sl-rating');
  const span = rating.nextElementSibling;
  const terms = ['No rating', 'Terrible', 'Bad', 'OK', 'Good', 'Excellent'];

  rating.addEventListener('sl-hover', event => {
    span.textContent = terms[event.detail.value];

    // Clear feedback when hovering stops
    if (event.detail.phase === 'end') {
      span.textContent = '';
    }
  });
</script>

<style>
  .detect-hover span {
    position: relative;
    top: -4px;
    left: 8px;
    border-radius: var(--sl-border-radius-small);
    background: var(--sl-color-neutral-900);
    color: var(--sl-color-neutral-0);
    text-align: center;
    padding: 4px 6px;
  }

  .detect-hover span:empty {
    display: none;
  }
</style>

import { useState } from 'react';
import SlRating from '@onsonr/nebula/dist/react/rating';

const terms = ['No rating', 'Terrible', 'Bad', 'OK', 'Good', 'Excellent'];
const css = `
  .detect-hover span {
    position: relative;
    top: -4px;
    left: 8px;
    border-radius: var(--sl-border-radius-small);
    background: var(--sl-color-neutral-900);
    color: var(--sl-color-neutral-0);
    text-align: center;
    padding: 4px 6px;
  }

  .detect-hover span:empty {
    display: none;
  }
`;

function handleHover(event) {
  rating.addEventListener('sl-hover', event => {
    setFeedback(terms[event.detail.value]);

    // Clear feedback when hovering stops
    if (event.detail.phase === 'end') {
      setFeedback('');
    }
  });
}

const App = () => {
  const [feedback, setFeedback] = useState(true);

  return (
    <>
      <div class="detect-hover">
        <SlRating label="Rating" onSlHover={handleHover} />
        <span>{feedback}</span>
      </div>
      <style>{css}</style>
    </>
  );
};

Custom Icons

You can provide custom icons by passing a function to the getSymbol property.

<sl-rating label="Rating" class="rating-hearts" style="--symbol-color-active: #ff4136;"></sl-rating>

<script>
  const rating = document.querySelector('.rating-hearts');
  rating.getSymbol = () => '<sl-icon name="heart-fill"></sl-icon>';
</script>

{% raw %}

import SlRating from '@onsonr/nebula/dist/react/rating';

const App = () => (
  <SlRating
    label="Rating"
    getSymbol={() => '<sl-icon name="heart-fill"></sl-icon>'}
    style={{ '--symbol-color-active': '#ff4136' }}
  />
);

{% endraw %}

Value-based Icons

You can also use the getSymbol property to render different icons based on value.

<sl-rating label="Rating" class="rating-emojis"></sl-rating>

<script>
  const rating = document.querySelector('.rating-emojis');

  rating.getSymbol = value => {
    const icons = ['emoji-angry', 'emoji-frown', 'emoji-expressionless', 'emoji-smile', 'emoji-laughing'];
    return `<sl-icon name="${icons[value - 1]}"></sl-icon>`;
  };
</script>

import SlRating from '@onsonr/nebula/dist/react/rating';

function getSymbol(value) {
  const icons = ['emoji-angry', 'emoji-frown', 'emoji-expressionless', 'emoji-smile', 'emoji-laughing'];
  return `<sl-icon name="${icons[value - 1]}"></sl-icon>`;
}

const App = () => <SlRating label="Rating" getSymbol={getSymbol} />;