Can not have multiple meta "article:tag"

[taichunmin]

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

Bug report

meta article:tag is a array. Reference

By the way, there are more array type meta, not only article:tag.

Steps to reproduce

Write multiple meta article:tag in frontmatter

meta:
  - property: article:tag
    content: tag1
  - property: article:tag
    content: tag2
  - property: article:tag
    content: tag3

What is expected?

<meta property="article:tag" content="tag1">
<meta property="article:tag" content="tag2">
<meta property="article:tag" content="tag3">

What is actually happening?

<meta property="article:tag" content="tag1">

Other relevant information

vuepress/packages/@vuepress/core/lib/client/root-mixins/updateMeta.js

Line 36 in 3c94f71

getMergedMetaTags () {

Need to patch getMergedMetaTags()