digitransit-ui/app/meta.js

export default function getMetadata(lang, host, url, config) {
  const root = config.URL.ASSET_URL || config.APP_PATH;
  const path = config.iconPath || 'icons';
  const iconPath = `${root}/${path}`;
  const imageHost = config.URL.ASSET_URL || `https://${host}`;

  const baseData = {
    title: config.title,

    meta: [
      {
        'http-equiv': 'x-ua-compatible',
        content: 'ie=edge',
      },
      {
        'http-equiv': 'Content-Language',
        content: lang,
      },
      {
        name: 'charset',
        content: 'utf-8',
      },
      {
        name: 'description',
        content: config.meta.description,
      },
      {
        name: 'keywords',
        content: config.meta.keywords,
      },
      {
        name: 'viewport',
        content:
          'width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1 user-scalable=no, minimal-ui',
      },
      {
        name: 'referrer',
        content: 'origin',
      },
      {
        property: 'og:url',
        content: url,
      },
      {
        property: 'og:type',
        content: 'website',
      },
      {
        property: 'og:title',
        content: config.socialMedia.title,
      },
      {
        property: 'og:site_name',
        content: config.socialMedia.title,
      },
      {
        property: 'og:description',
        content: config.socialMedia.description,
      },
      {
        property: 'og:image',
        content: `${imageHost}${config.socialMedia.image.url}`,
      },
      {
        property: 'og:image:width',
        content: config.socialMedia.image.width,
      },
      {
        property: 'og:image:height',
        content: config.socialMedia.image.height,
      },
      {
        property: 'og:locale',
        content: config.socialMedia.locale,
      },
      {
        property: 'twitter:card',
        content: config.socialMedia.twitter.card,
      },
      {
        property: 'twitter:site',
        content: config.socialMedia.twitter.site,
      },
      {
        property: 'twitter:creator',
        content: config.socialMedia.twitter.site,
      },
      {
        property: 'twitter:title',
        content: config.socialMedia.title,
      },
      {
        property: 'twitter:description',
        content: config.socialMedia.description,
      },
      {
        property: 'twitter:image',
        content: `${imageHost}${config.socialMedia.image.url}`,
      },
    ],
    link: [
      {
        rel: 'yandex-tableaou-widget',
        href: `${iconPath}yandex-browser-manifest.json`,
      },
    ],
  };

  if (config.metaData) {
    return {
      meta: baseData.meta.concat(config.metaData.meta),
      link: baseData.link.concat(config.metaData.link),
      title: config.title,
    };
  }

  return baseData;
}