Error: Plugin docusaurus-plugin-google-analytics is used 2 times with id=default.

[Southclaws]

🐛 Bug Report

I upgraded to the latest version and got this

Error: Plugin docusaurus-plugin-google-analytics is used 2 times with id=default.
To use the same plugin multiple times on a Docusaurus site, you need to assign a unique id to each plugin instance.

Have you read the Contributing Guidelines on issues?

Yes

To Reproduce

Install google analytics plugin on a docusaurus instance (it might happen with other plugins but we only use the GA one)

Try it here https://github.com/openmultiplayer/wiki/ using commit 2b2321341d32121ff3195fc801d0831b1693ce10

I fixed it by giving the GA plugin an explicit ID: openmultiplayer/wiki@6fada68

Your Environment

• Docusaurus version used: v2 alpha 66
• Environment name and version (e.g. Chrome 78.0.3904.108, Node.js 10.17.0): latest stable node
• Operating system and version (desktop or mobile): windows and vercel, so linux I think

[slorber]

Hi,

If you use the classic preset with googleAnalytics themeConfig, you already use the google analytics plugin, as it's included in the preset.

So you actually have 2 instances of the google analytics plugin running on your site, which is likely not something you want right?

I'll improve the error message to make this clearer

[Southclaws]

Ah, I didn't know it was added by default now. Thanks!

[slorber]

it is added only when your preset classic has the googleAnalytics config attribute

[gulien]

Hello @slorber,

Sorry to comment on this closed issue, but I wonder where to put exactly the googleAnalytics config with preset classic?

I've tried:

presets: [
    [
      '@docusaurus/preset-classic',
      {
        themeConfig: {
          googleAnalytics: {
            trackingID: 'XXX',
            // Optional fields.
            anonymizeIP: true, // Should IPs be anonymized?
          },
        },
      },
    ],
  ],

And:

presets: [
    [
      '@docusaurus/preset-classic',
      {
        googleAnalytics: {
          trackingID: 'XXX',
          // Optional fields.
          anonymizeIP: true, // Should IPs be anonymized?
        },
      },
    ],
  ],

And:

module.exports = {
  themeConfig: {
    googleAnalytics: {
      trackingID: 'XXX',
      // Optional fields.
      anonymizeIP: true, // Should IPs be anonymized?
     },
  },
}

But no success so far 😄

Version: 2.0.0-alpha.69

Thank you for your help!

[slorber]

https://v2.docusaurus.io/docs/api/plugins/@docusaurus/plugin-google-analytics/#configuration

this one should work:

module.exports = {
  themeConfig: {
    googleAnalytics: {
      trackingID: 'XXX',
      // Optional fields.
      anonymizeIP: true, // Should IPs be anonymized?
     },
  },
}

Note: it is only enabled on the production build, so you'll have to use docusaurus build && docusaurus serve to test that

[gulien]

Thanks @slorber for the quick answer. 😉

The "working" solution was the one I tried first but alas it did not and still do not work.

I'm using a GitHub workflow to deploy my documentation on the gh-pages branch. It runs the following instructions at the end:

yarn install --frozen-lockfile
yarn deploy

So either:

• There is a bug (I doubt it)
• I did not configure my Google Analytics correctly (I doubt it)
• It cannot work with GitHub hosting?
• Should I configure gtag too? (https://v2.docusaurus.io/docs/api/plugins/@docusaurus/plugin-google-gtag/)

Thanks for your time! 😄

[slorber]

@gulien I will only be able to help you if you provide me a repro using the config I gave you + a live deployment where I can indeed see it does not work.

[gulien]

My bad the documentation source code is located here:
https://github.com/thecodingmachine/symfony-boilerplate/tree/master/docs

And the documentation is available here: https://thecodingmachine.github.io/symfony-boilerplate/

[slorber]

This works, as you can see

[gulien]

Ok so GA do not show anything, so I guess I actually did not configura GA correctly on my side...
Sorry for that, have a nice day :)

[slorber]

that's probably it yes :) afaik it works on RN website

[adsazad]

I am using @docusaurus/preset-classic, in my case, it is not collecting data. I tried to google analytics as well as gtag method but neither one is working.

[slorber]

@adsazad there were changes recently on this (config was moved from themeConfig to plugin options), and we can't help if you don't provide your docusaurus version and provide more context

If you follow the official doc of your exact docusaurus version (not production doc), you should be able to make it work and see GA requests in the network tab

Also note that Google launched Google Analytics 4, to progressively replace all the former analytics generations, and we don't support that yet. There's an issue to support it here: #7221