# How to Configure the Domain Parameter in plausible-hugo

> Learn to configure the domain parameter in plausible-hugo by setting params.plausible.domain correctly in your config.toml for accurate analytics tracking.

- Repository: [divinerites/plausible-hugo](https://github.com/divinerites/plausible-hugo)
- Tags: how-to-guide
- Published: 2026-02-28

---

**To configure the domain parameter in divinerites/plausible-hugo, set `params.plausible.domain` in your [`config.toml`](https://github.com/divinerites/plausible-hugo/blob/main/config.toml) to the exact site identifier from your Plausible dashboard (e.g., `example.com`), ensuring it contains no protocol or trailing slashes.**

The `domain` parameter is the mandatory identifier that tells Plausible which site to attribute traffic to when using the `plausible-hugo` module. Configuring this value correctly ensures that analytics data flows into the correct dashboard and that your Hugo build completes without validation errors.

## Understanding the Domain Parameter

The `domain` parameter serves as the **site ID** that Plausible uses to aggregate analytics data. When you add a site to your Plausible dashboard, you specify a domain—this exact string (typically your root domain like `example.com`) must be mirrored in your Hugo configuration.

This parameter is **mandatory**; the module validates its presence at build time and will fail the build if it is missing or empty.

## Where the Domain Parameter Is Validated

The module enforces the presence of the `domain` parameter through a validation partial that runs during Hugo's build process.

In [`layouts/partials/plausible_check.html`](https://github.com/divinerites/plausible-hugo/blob/main/layouts/partials/plausible_check.html) (lines 7–9), the module checks for the existence of `site.Params.plausible.domain`:

```go
{{ if not site.Params.plausible.domain }}
  {{ errorf "plausible-hugo module : Upgrade your config.toml; You need [params.plausible.domain] : your-plausible-domain-id" }}
{{ end }}

```

If this parameter is absent, Hugo stops with the error message above, preventing a deployment that would fail to track analytics.

## How to Configure the Domain Parameter in config.toml

### Minimal Configuration

For a standard setup, add the following to your [`config.toml`](https://github.com/divinerites/plausible-hugo/blob/main/config.toml):

```toml
theme = ["plausible-hugo"]

[params.plausible]
  enable = true
  domain = "example.com"

```

Replace `example.com` with the exact site identifier shown in your Plausible dashboard. Do not include `https://`, `www.`, or trailing slashes.

### Full Configuration with Optional Features

When using advanced features like outbound link tracking or Netlify proxying, the `domain` parameter remains the central identifier:

```toml
theme = ["plausible-hugo"]

[params.plausible]
  enable               = true
  domain               = "example.com"
  outbound_link        = true
  file_downloads       = true
  hash_based_routing   = true
  proxy_netlify        = true
  debug                = false

```

Even when `proxy_netlify` changes the script source URL to a local proxy path, the `data-domain` attribute injected into the HTML still derives from this `domain` value.

## How the Domain Value Is Rendered in HTML

The `domain` parameter is injected into the page's `<head>` via [`layouts/partials/plausible_head.html`](https://github.com/divinerites/plausible-hugo/blob/main/layouts/partials/plausible_head.html). At lines 64 and 73, the template renders the `data-domain` attribute:

```html
<script defer data-domain="{{ site.Params.plausible.domain }}"
        src="https://plausible.io/js/script.js"></script>

```

When rendered with `domain = "example.com"`, the output becomes:

```html
<script defer data-domain="example.com"
        src="https://plausible.io/js/script.js"></script>

```

Plausible's JavaScript reads this `data-domain` attribute to determine which dashboard site should receive the analytics events.

## Common Configuration Mistakes to Avoid

### Including Protocol or Trailing Slashes

The `domain` must be a clean hostname, not a URL. Avoid these incorrect formats:

```toml

# WRONG - includes protocol

domain = "https://example.com"

# WRONG - includes trailing slash

domain = "example.com/"

# WRONG - includes www prefix if not used in Plausible dashboard

domain = "www.example.com"

```

### Confusing Domain with Dashboard URL

The `domain` parameter is **not** the URL of your Plausible dashboard. If you self-host Plausible at `analytics.mydomain.com`, you still set `domain` to your site ID (e.g., `mysite.com`), while the dashboard location is handled separately by optional parameters like `selfhosted_domain`.

### Mismatch with Self-Hosted Settings

When using `selfhosted_domain` to point to a custom Plausible instance, remember that this changes the script **source** only. The `domain` parameter still identifies the site within your Plausible instance:

```toml
[params.plausible]
  domain = "example.com"           # Site ID in Plausible

  selfhosted_domain = "plausible.myserver.com"  # Where the script loads from

```

## Summary

- The `domain` parameter in `divinerites/plausible-hugo` is **mandatory** and validated at build time in [`layouts/partials/plausible_check.html`](https://github.com/divinerites/plausible-hugo/blob/main/layouts/partials/plausible_check.html).
- Set it to the exact site identifier from your Plausible dashboard (e.g., `example.com`) without protocols or slashes.
- The value is injected into the HTML as the `data-domain` attribute in [`layouts/partials/plausible_head.html`](https://github.com/divinerites/plausible-hugo/blob/main/layouts/partials/plausible_head.html) (lines 64 and 73).
- This parameter identifies which site receives analytics data, regardless of whether you use Plausible's hosted service, self-hosting, or Netlify proxying.

## Frequently Asked Questions

### What happens if I forget to set the domain parameter?

Hugo will fail the build with the error: `plausible-hugo module : Upgrade your config.toml; You need [params.plausible.domain] : your-plausible-domain-id`. This validation occurs in [`layouts/partials/plausible_check.html`](https://github.com/divinerites/plausible-hugo/blob/main/layouts/partials/plausible_check.html) to prevent deploying a site that cannot track analytics.

### Can I use a subdomain as the domain value?

Yes, but it must exactly match the site identifier you configured in your Plausible dashboard. If you added `blog.example.com` as a site in Plausible, use `domain = "blog.example.com"`. Do not prepend `www.` unless that exact string is your site ID in Plausible.

### How does the domain parameter interact with proxy settings?

The `domain` parameter remains unchanged regardless of proxy configuration. When `proxy_netlify` is enabled, the script source URL changes to a local path (e.g., [`/misc/js/script.js`](https://github.com/divinerites/plausible-hugo/blob/main//misc/js/script.js)), but the `data-domain` attribute in the generated HTML still uses the value from `params.plausible.domain`.

### Is the domain parameter different when self-hosting Plausible?

No, the `domain` parameter serves the same purpose when self-hosting: it identifies the site within your Plausible instance. When self-hosting, use the `selfhosted_domain` parameter to specify where the analytics script loads from (e.g., `analytics.mydomain.com`), while keeping `domain` set to your site ID.