TypeError: window.__setPreferredTheme is not a function

[kiku511]

Steps to reproduce:

1. gatsby new gatsby-blog
2. npm install gatsby-plugin-dark-mode
3. Copied the ThemeToggler code from documentation.
4. Added Component to index.js
5. Clicking on the generated checkbox produces error.

[kiku511]

File:

toggleTheme
node_modules/gatsby-plugin-dark-mode/ThemeToggler.js:54

[SleeplessByte]

Did you forget to include the plugin in your gatsby-config.js?

[SpacemanPete]

I got the same error. Restarting my local dev server fixed it for me.

[ethernal]

Sadly I have the same issue:

1. restarted dev server,
2. removed options from plugin initialization,
3. cleared cache and started server again.

Still the same, crashes when clicking the checkbox.

[twanmulder]

I had the same error, but it was fixed by adding "--save" to the npm command.
So to install the plugin, I used:

npm install gatsby-plugin-dark-mode --save

[muhammedMoussa]

Did you forget to include the plugin in your gatsby-config.js?

yeah, this works fine.