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Amperage theme

Amperage is a theme for static site generator GoHugo. This theme provides the following features:

  • Generates native AMP pages.
  • Valid PWA out of the box.
  • Automatic structured data.
  • Service worker for asset caching, link prefetching and offline navigation.
  • Made with SEO in mind.
  • Multilanguage and i18n support.
  • Code highlighting on build time.
  • Super fast and lightweight.
  • Minimal and easily overridable styles.
  • Basic AMP shortcodes and markdown render hooks for ease of use.
  • Header menu, table of contents and related posts.
  • Uses web safe fonts by default.
  • Automatic image croping and srcset generation.
  • Social share buttons and OGP/Twitter card tags.
  • Customizable Google Analytics with gtag.
  • Configurable Adsense shortcode.
  • Comment system agnostic (Disqus example).

❯ Installation

You can use the exampleSite provided to bootstrap your new project:

git clone https://github.com/asurbernardo/amperage.git

mkdir -p new-site/themes/amperage

mv amperage/exampleSite/* new-site
mv amperage/* new-site/themes/amperage

cd new-site

hugo serve

❯ Kitchen sink

You can check out all the components of this theme here and a fully functional website using Amperage here by yours truly.

❯ Configuration

# Default language if you have a multi-language setup
DefaultContentLanguage = "en"

baseURL = "https://example.com"
theme = "amperage"
pygmentsUseClasses = true

# Number of posts shown per page
paginate = 10

# Language sections
[languages]
    [languages.en]
        contentDir = "content"
        languageName = "English"
        languageCode = "en"
        title = "Amperage theme ⚡"
        description = "This is an example page for the Amperage theme!"
        weight = 1
    [languages.es]
        contentDir = "content/spanish"
        languageName = "Español"
        languageCode = "es"
        title = "Tema Amperage ⚡"
        description = "Esta es una página de ejemplo para el tema Amperage!"
        weight = 2

# Menu elements
[[menu.main]]
    identifier = "hugo"
    name = "Hugo"
    url = "https://gohugo.io"
    weight = 10
[[menu.main]]
    identifier = "github"
    name = "GitHub"
    url = "https://github.com/asurbernardo/amperage"
    weight = 10

# Enable only tags taxonomy
[taxonomies]
    tag = "tags"

[params]
    copyright = "Amperage" # Name shown on footer copyright
    themeColor = "#333" # Theme color displayed on mobile browsers

    # Default AMP components for the whole site
    ampElements = ["amp-analytics", "amp-social-share", "amp-install-serviceworker", "amp-iframe"]

    # Google Analytics code
    googleAnalytics = "UA-128498798-1"

    # Adsense publisher code
    adsensePublisher = "ca-pub-123456789"

    # Comments Iframe URL
    commentsEmbedUrl = "https://comments.example.com"

    # Social sites for metatags
    facebookSite = "example"
    twitterSite = "@example"

    # Structured data elements
    socialProfiles = ["https://twitter.com/example","https://www.linkedin.com/in/example/","https://github.com/example"]

    alternatePageName = "Amperage example"
    organizationLogo = "/logo.png"
    organizationName = "Asur"

    publisherName = "amperage"
    publisherLogo = "/logo-amp-article.png"
    publisherLogoWidth = 600
    publisherLogoHeight = 60

# Generate json to use as search index
[outputs]
    home = [ "HTML", "RSS", "SearchIndex"]

[outputFormats]
    [outputFormats.SearchIndex]
        mediaType= "application/json"
        baseName= "search"
        isPlainText= true
        notAlternative= true

# Enable unsafe mode to be able to use HTML on markdown
[markup]
    [markup.goldmark]
        [markup.goldmark.renderer]
            unsafe = true

❯ Customize logo

To override the default logo add the svg markup on the partial layouts/partials/header/logo.html.

❯ Customize styles

To override default styles just add the file assets/custom.scss to your project and it will be transpiled, minified and appended automatically. Default styles only weight 5KB (including code highlighting), that leaves you with 45KB to further customize the theme.

❯ Enable cross-domain service worker installation

To enable cross-domain service worker you need to override the file static/install-sw.html:

<amp-install-serviceworker
  src="https://your-site.com/sw.js"
  data-iframe-src="https://your-site.com/install-sw.html"
  layout="nodisplay">
</amp-install-serviceworker>

❯ Menu links

On the menu you can set internal and external links. To set external links you can use the config.toml file:

[[menu.main]]
    identifier = "hugo"
    name = "Hugo"
    url = "https://gohugo.io"
    weight = 10
[[menu.main]]
    identifier = "github"
    name = "GitHub"
    url = "https://github.com/asurbernardo/amperage"
    weight = 10

If you want to display a page from your own site on the menu you need to add to the frontmatter of that page:

[languages.es]
    [menu.main]
        name = "Your title for the menu"
        weight = 20

This distinction is important because the service worker needs to identify the internal URLs so it can eager load them.

❯ Display ads

To enable ads you need to have an approved Adsense publisher code. Once you get one set it in the config.toml:

adsensePublisher = "ca-pub-123456789"

Now you can use the amp-ad shortcode:

{{< amp-adsense
    width="320"
    height="320"
    layout="fixed"
    slot="123456789" >}}

❯ Comments

Due to AMP requirements the comments need to be hosted in a domain different from the original. Amperage is ready to receive a URL to embed comments at the end of every post. This is to achieve a degree of agnosticy for the comment system.

Remember that to resize the iframe containing the comment box you need to send a message to the amp sentinel with the new height:

window.requestAnimationFrame(() => {
    window.parent.postMessage({
    sentinel: 'amp',
    type: 'embed-size',
    height: msg.data.height
    }, '*');
});

If you want to integrate your own comment service Amperage will add the parameters id and url to the request so you can use them on the iframe, in case you need a unique id. An example for Disqus:

var urlParams = new URLSearchParams(window.location.search);

var disqus_config = function () {
    this.page.url = urlParams.get('url');
    this.page.identifier = urlParams.get('id');
};

What I personally recommend is to use a new Github Pages project and refer it from your main site. Here you can see a fully functional example using Disqus.

❯ Contributing to Amperage

If you have a feature request or have found a bug feel free to open a new issue.