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

Right now the 🌞/🌜 light/dark mode toggle checkbox has the aria-label "Switch between dark and light mode". "Checked" and "not checked" are ambiguous terms without more context because some websites default to dark mode and/or don't respect system defaults.

I realize it might seem at first like the group of people who want a screenreader and care about light vs dark mode might seem small. A couple quick scenarios that come to mind:

• Some folks such as low vision or with reading difficulties use screenreaders to assist with difficult-to-understand pages
• Some folks can't see the website in one mode, and can only see it in the other

Steps to reproduce

1. Open a screenreader such as NVDA on Windows or VoiceOver on Mac
2. Put screenreader/text focus on the light/dark mode toggle

Expected behavior

I'm not an expert here, but maybe a message like...

switch from light to dark mode checkbox, not checked

...or maybe use a button instead of a checkbox behind the scenes?

switch between light and dark mode checkbox (current value light)

Actual behavior

The narration by default in light mode is roughly:

switch between light and dark mode checkbox, not checked

Your environment

• Public source code: https://github.com/typescript-eslint/typescript-eslint
• Public site URL: https://typescript-eslint.io
• Docusaurus version used: 2.0.0-beta.15
• Environment name and version (e.g. Chrome 89, Node.js 16.4): Chrome 89
• Operating system and version (e.g. Ubuntu 20.04.2 LTS): Windows 10

Reproducible demo

https://typescript-eslint.io

Self-service

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