Resolves a URL to its preview, or null when none is available. Fetching happens outside the editor (a server endpoint, an oEmbed proxy…) because the browser cannot read a third-party page's metadata directly.
Resolves a URL to its preview, or null when none is available. Fetching happens outside the editor (a server endpoint, an oEmbed proxy…) because the browser cannot read a third-party page's metadata directly.