ArtPlayer/packages/artplayer/src/contextmenu/playbackRate.js

import { inverseClass } from '../utils';

export default function playbackRate(art) {
  const { option, i18n, player } = art;
  return {
    disable: !option.playbackRate,
    name: 'playbackRate',
    index: 10,
    html: `
      ${i18n.get('Play speed')}:
      <span data-rate="0.5">0.5</span>
      <span data-rate="0.75">0.75</span>
      <span data-rate="1" class="normal current">${i18n.get('Normal')}</span>
      <span data-rate="1.25">1.25</span>
      <span data-rate="1.5">1.5</span>
      <span data-rate="2.0">2.0</span>
    `,
    click: event => {
      const { target } = event;
      const { rate } = target.dataset;
      if (rate) {
        player.playbackRate(Number(rate));
        art.contextmenu.hide();
      }
    },
    callback: $menu => {
      art.on('playbackRateChange', rate => {
        const $current = Array.from($menu.querySelectorAll('span')).find(
          item => Number(item.dataset.rate) === rate
        );
        inverseClass($current, 'current');
      });
    }
  };
}