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Req Subdomains

_includes/api/en/5x/req-subdomains.md

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<h3 id='req.subdomains'>req.subdomains</h3>

An array of subdomains in the domain name of the request.

js
// Host: "tobi.ferrets.example.com"
console.dir(req.subdomains)
// => ["ferrets", "tobi"]

The application property subdomain offset, which defaults to 2, is used for determining the beginning of the subdomain segments. To change this behavior, change its value using [app.set](/{{ page.lang }}/5x/api.html#app.set).