Customize page title per plugin instance - avoid duplicated page title

Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I’m using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

By default, the landing page name repeats itself, i.e. “Auth with Caddy | Auth with Caddy”.

Steps to reproduce

Please see the landing page of https://authp.github.io/

Expected behavior

The page name should not repeat, i.e. be “Auth with Caddy”.

Actual behavior

The name repeats itself “Auth with Caddy | Auth with Caddy”.

Your environment

• Public source code: https://github.com/authp/authp.github.io
• Public site URL: https://authp.github.io/
• Docusaurus version used: 2.0.0-beta.9
• Environment name and version (e.g. Chrome 89, Node.js 16.4): Node v14.17.6
• Operating system and version (e.g. Ubuntu 20.04.2 LTS): CentOS 8

Reproducible demo

No response

Self-service

• I’d be willing to fix this bug myself.

[Josh-Cena]

You can omit the title field in the home page layout:

export default function home() {
  return (
    // Don't add the title here
    <Layout>
      {/* ... */}
    <Layout>
  )
}

And I do think there’s something we can do: check if site title is equal to page title, and do not duplicate if that’s the case:

https://github.com/facebook/docusaurus/blob/cbcaa52f88cb702a3712c2b4c19b02225f975ea9/packages/docusaurus-theme-common/src/utils/generalUtils.ts#L12-L14

[Sas2k]

yeah same here (Not to NecroPost)