openUrl = (buttonUrl) => () => {
  globalThis.open(buttonUrl, "_blank", "noopener,noreferrer");
}
Map of social networks to their respective URL builders.

The `d` argument of each builder is the object with the page metadata, such
as page title, URL, author name, etc.

@type {{ [network: string]: (d: {
  url: string,
  title?: string,
  media?: string,
  text?: string,
  via?: string,
  fbAppId?: string,
  s2fInstance?: string,
}) => string}}