`canonical.href.match`

Default: error
Options: {"hostname":""}
Plugin: canonical

The canonical href uses the site hostname.

Why: A canonical link to another site hands your page's ranking to that site. This is often a copy-paste mistake.

Without a hostname option or a host, the rule is skipped.

When off: canonical links to any site pass.

Option	Type	Default	Description
`hostname`	`string`	`""`	The hostname to require. When empty, the rule uses the `host` from your config.

<!-- With host "https://example.com" -->

<!-- ✗ Fails -->
<link rel="canonical" href="https://other.com/about/" />

<!-- ✓ Passes -->
<link rel="canonical" href="https://example.com/about/" />

rules: { "canonical.href.match": { hostname: "www.example.com" } }

References

Google: How to specify a canonical URL: A canonical link points search engines to the URL to show instead of the page.