require title keyword for frontmatters

[yuchanns]

Feature request

What problem does this feature solve?

give users customized title in tags page

What does the proposed API look like?

when people use plugin like this:

plugins: [
  [
    '@vuepress/blog',
    {
      frontmatters: [
        id: 'tags',
        keys: ['tags'],
        path: '/tags/',
        layout: 'Tag',
        scopeLayout: 'Tag',
        title: '标签'
      ]
    }
  ]
]

then they shall see the html <title> element when visit /tags/anyTag like anyTag 标签 | $siteTitle.

How should this be implemented in your opinion?

Do not know

Are you willing to work on this yourself?

[billyyyyy3320]

Actually, the title is generated by id. Try:

      frontmatters: [
        {
          id: "標籤",
          keys: ['tag'],
          path: '/tag/',
        },
      ],

[yuchanns]

Actually, the title is generated by id. Try:

      frontmatters: [
        {
          id: "標籤",
          keys: ['tag'],
          path: '/tag/',
        },
      ],

I have tried this way before the issue, and it caused another problem: I got the global computed variable like $标签.But what I want is that I can always use the variable as $tags and I am able to custom the <title> element in any language anytime without changing my code to adapt the changing variable name:)