Options for hiding/adding a link

[shuding]

Closes #341.

Add a link to the navbar/sidebar:

  "nextra_link": {
    "title": "Nextra ↗",
    "href": "https://github.com/shuding/nextra",
    "type": "page",
    "newWindow": true
  },

Hide a page/directory in navbar/sidebar:

  "error-handling": {
    "title": "Error Handling",
    "hidden": true
  },

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployments, click below or on the icon next to each commit.

nextra – ./

🔍 Inspect: https://vercel.com/vercel/nextra/8nB1uBuBUYjvJ4uhf71z8Cy3aa8b
✅ Preview: Canceled

nextra-theme-docs-dev – ./examples/swr-site

🔍 Inspect: https://vercel.com/vercel/nextra-theme-docs-dev/2w9cNkhZFDVwDmFDdxfUjLwFjmSJ
✅ Preview: https://nextra-theme-docs-dev-git-shu-4747.vercel.sh

[joshxyzhimself]

Looks like "hidden": true doesn't work, but the following worked:

{
  "example-page": {
    "display": "hidden"
  }
}

Related:

• Hidden folder is still shown in the mobile view #1909
• Suppressing display of pages marked as "display": "hidden" in mobile design hamburger menu #2408