Because this page includes a <platinum-https-redirect> element, it will automatically redirect to the https: version of this page when the following is true:

• The page is accessed via the http: protocol.
• The page's hostname is not localhost or one of its equivalents.

In order to test this functionality, you can visit this page via http://polymerelements.github.io/platinum-https-redirect/demo/index.html. Because that URL uses http: and is not on localhost, it will automatically redirect to https://polymerelements.github.io/platinum-https-redirect/demo/index.html instead.