signal-desktop/ts/components/conversation/media-gallery/MediaGridItem.md

With image

const message = {
  id: '1',
  thumbnailObjectUrl: 'https://placekitten.com/76/67',
  attachments: [
    {
      fileName: 'foo.jpg',
      contentType: 'image/jpeg',
    },
  ],
};
<MediaGridItem i18n={util.i18n} message={message} />;

With video

const message = {
  id: '1',
  thumbnailObjectUrl: 'https://placekitten.com/76/67',
  attachments: [
    {
      fileName: 'foo.jpg',
      contentType: 'video/mp4',
    },
  ],
};
<MediaGridItem i18n={util.i18n} message={message} />;

Without image

const message = {
  id: '1',
  attachments: [
    {
      fileName: 'foo.jpg',
      contentType: 'application/json',
    },
  ],
};
<MediaGridItem i18n={util.i18n} message={message} />;