Light mode doesn't persist on navigation/refresh

[samcunliffe]

Describe the Bug

When browsing the website in light mode, the theme switches on every refresh.

To Reproduce

Switch to light mode and refresh the website.

Expected Behaviour

The website stays in light mode.

Actual Behaviour

The website switches theme back to dark mode.

Additional Context

- Operating system: Tested in Chrome Android/mobile and Firefox on Mac.

[paddyroddy]

Never considered using light mode, but can confirm this. It's not ideal...

[paddyroddy]

Related to just-the-docs/just-the-docs#1223

[samcunliffe]

Looks like we might need to persist the choice in JS...

  <script>
    if (localStorage.getItem('theme') === 'dark') document.documentElement.classList.add('dark-mode');
  </script>