Add canonical to all pages

[sigdestad]

Application should automatically add the meta canonical element to all pages

Background

Site engine renders the same content on URLs with or without trailing slash I.e. developer.enonic.com/docs and developer.enonic.com/docs/. By convention, Enonic's API generate links without trailing slash, which is implicitly also the default format for Enonic URLs.

In cases where multiple variants of links exist, adding canonical information to pages will eliminate duplicate indexes and optimize SEO

Requirements

Metafields should add the canonical tag on all pages, however, when the page ends with /, the canonical link should point to the URL without /.

Example:

NOTE: The described handling is already correctly implemented and rendered for the og:url element

NOTE: If the rendered page is not a content item, behavior should be similar as for the og:url element

App config

In the "General" section, add a new checkbox - hide canonical (default is not checked)
Once set, Metafields app must not set the canonical tag

Content config

• In the content SEO form, change the "Canonical" label to "Override canonical"

Guillotine

The Headless extension implements a canonical field that contains null, or a content item.
Add new field for the hide canonical general config (like other hide fields).