• I confirm that this is an issue rather than a question.

Bug report

Steps to reproduce

What is expected?

Canonical Url is grabbed from the canonicalUrl entry in the frontmatter

What is actually happening?

The canonical URL is not being injected into the SSR template because in PR #2658 the frontmatter entry was renamed (during development) to canonicalUrl from canonical.

Line 69 in packages/@vuepress/core/lib/node/ClientComputedMixin.js is looking for a non-existent property called canonical and needs to be updated to the following:

const { canonicalUrl } = this.$page.frontmatter

Tagging @d-pollard