Vuepress: Support three level sidebar

[sankincn]

Feature request

Support three level sidebar

What problem does this feature solve?

Common nedds

What does the proposed API look like?

[
  {
    title: '概述',
    children: ['introduce',  'quick-start']
  },
  {
    title: '组件',
    sub: [
      {
        title: '基础组件',
        children: ['button',  'tab']
      },
      {
        title: '滚动组件',
        children: ['scroll',  'list']
      }
    ]
  }
]

How should this be implemented in your opinion?

Add level

Are you willing to work on this yourself?**

No, no plan to see the vuepress source code

[ulivz]

Thanks for your interest in VuePress, but for now we don't plan to support more deep-level sidebar.

[sankincn]

I hope will support in the future

[waruqi]

I also hope we can set the sidebar depth to more than 3 levels. I think vuepress is really good, but the sidebar depth doesn't meet my documentation needs. 😭