Returned by parsePage: what a page says about itself, entities decoded, values trimmed and URLs absolute.
optional
title: string
The text of the <title> element.
optional
themeColor: string
The theme-color, as written: pass it to normalizeCssColor.
optional
maskIconColor: string
The color of the Safari pinned-tab icon, as written.
optional
bestIcon: string
The largest icon the page links, which the thumbnail placeholder draws.
optional
largeImage: string
The first image declared at least 200 pixels both ways.
optional
firstContentImage: string
The first image that doesn't look like page furniture.
meta(key: string): string | undefined
Returns the content of the first <meta> whose property or name is
key, in any case: sites write og: tags under either attribute, and
Twitter's too.