hugo-theme-relearn/exampleSite/content/basics/customization/_index.en.md

+++ title = "Customization" weight = 25 +++

Serving your page from a subfolder

If your site is served from a subfolder, eg. https://example.com/mysite/, you have to set the following lines to your config.toml

baseURL = "https://example.com/mysite/"
canonifyURLs = true
relativeURLs = true

Without canonifyURLs=true URLs in sublemental pages (like sitemap.xml, rss.xml) will be generated falsly while your HTML files will still work. See https://github.com/gohugoio/hugo/issues/5226.

Serving your page from the filesystem

If you want your page served from the filesystem by using URLs starting with file:// you'll need the following configuration in your config.toml:

relativeURLs = true

The theme will append an additional index.html to all page bundle links by default to make the page be servable from the file system. If you don't care about the file system and only serve your page via a webserver you can also generate the links without this change by adding this to your config.toml

[params]
  disableExplicitIndexURLs = true

{{% notice note %}} If you want to use the search feature from the file system using an older installation of the theme make sure to change your outputformat for the homepage from the now deprecated JSON to SEARCH as seen below. {{% /notice %}}

Activate search

If not already present, add the following lines in your config.toml file.

[outputs]
  home = ["HTML", "RSS", "SEARCH"]

This will generate a search index file at the root of your public folder ready to be consumed by the Lunr search library. Note that the SEARCH outputformat was named JSON in previous releases but was implemented differently. Although JSON still works, it is now deprecated.

Activate dedicated search page

You can add a dedicated search page for your page by adding the SEARCHPAGE outputformat to your home page by adding the following lines in your config.toml file. This will cause Hugo to generate a new file http://example.com/mysite/search.html.

[outputs]
  home = ["HTML", "RSS", "SEARCH", "SEARCHPAGE"]

You can access this page by either clicking on the magnifier glass or by typing some search term and pressing ENTER inside of the menu's search box .

{{% notice note %}} To have Hugo create the dedicated search page successfully, you must not generate the URL http://example.com/mysite/search.html from your own content. This can happen if you set uglyURLs=true in your config.toml and defining a Markdown file content/search.md.

To make sure, there is no duplicate content for any given URL of your project, run hugo --printPathWarnings. {{% /notice %}}

Activate print support

You can activate print support to add the capability to print whole chapters or even the complete site. Just add the PRINT output format to your home, section and page in your config.toml as seen below:

[outputs]
  home = ["HTML", "RSS", "PRINT", "SEARCH"]
  section = ["HTML", "RSS", "PRINT"]
  page = ["HTML", "RSS", "PRINT"]

This will add a little printer icon in the top bar. It will switch the page to print preview when clicked. You can then send this page to the printer by using your browser's usual print functionality.

{{% notice note %}} The resulting URL will not be configured ugly in terms of Hugo's URL handling even if you've set uglyURLs=true in your config.toml. This is due to the fact that for one mime type only one suffix can be configured.

Nevertheless, if you're unhappy with the resulting URLs you can manually redefine outputFormats.PRINT in your own config.toml to your liking. {{% /notice %}}

Home Button Configuration

If the disableLandingPageButton option is set to false, a Home button will appear on the left menu. It is an alternative for clicking on the logo. To edit the appearance, you will have to configure the landingPageName for the defined languages:

[languages]
[languages.en]
...
[languages.en.params]
landingPageName = "<i class='fas fa-home'></i> Home"
...
[languages.pir]
...
[languages.pir.params]
landingPageName = "<i class='fas fa-home'></i> Arrr! Homme"
...

If this option is not configured for a specific language, they will get their default values:

landingPageName = "<i class='fas fa-home'></i> Home"

The home button is going to look like this:

Social Media Meta Tags

You can add social media meta tags for the Open Graph protocol and Twitter Cards to your site. These are configured as mentioned in the Hugo docs.

Change the Menu Width

The menu width adjusts automatically for different screen sizes.

Name	Screen Width	Menu Width
S	< 48rem	0
M	48rem - 60rem	14.375rem
L	>= 60rem	18.75rem

The values for the screen width breakpoints aren't configurable.

If you want to adjust the menu width you can define the following CSS variables in your custom-header.html. Note that --MENU-WIDTH-S doesn't exist as the menu is always hidden for small screen sizes.

:root {
    --MENU-WIDTH-M: 14.375rem;
    --MENU-WIDTH-L: 18.75rem;
}

Own Shortcodes with JavaScript Dependencies

Certain shortcodes make use of additional JavaScript files. The theme only loads these dependencies if the shortcode is used. To do so correctly the theme adds management code in various files.

You can you use this mechanism in your own shortcodes. Say you want to add a shortcode myshortcode that also requires the jquery JavaScript library.

1. Write the shortcode file layouts/shortcodes/myshortcode.html and add the following line

   {{- .Store.Set "hasMyShortcode" true }}
   

2. Add the following snippet to your config.toml

   [params.relearn.dependencies]
     [params.relearn.dependencies.myshortcode]
       name = "MyShortcode"
       location = "footer"
   

3. Add the dependency loader file layouts/partials/dependencies/myshortcode.html. The loader file will be appended to your header or footer, dependend on the location setting in your config.toml.

   <script src="https://www.unpkg.com/jquery/dist/jquery.js"></script>
   

Character casing is relevant!

• the name setting in your config.toml must match the key (that needs to be prefixed with a has) you used for the store in your layouts/shortcodes/myshortcode.html.
• the key on params.relearn.dependencies in your config.toml must match the base file name of your loader file.

See the math, mermaid and openapi shortcodes for examples.

Output Formats

Certain parts of the theme can be changed for support of your own output formats. Eg. if you define a new output format PLAINTEXT in your config.toml, you can add a file layouts/partials/header.plaintext.html to change the way, the page header should look like for that output format.

React to Variant Switches in JavaScript

Once a color variant is fully loaded, either initially or by switching the color variant manually with the variant selector, the custom event themeVariantLoaded on the document will be dispatched. You can add an event listener and react to changes.

document.addEventListener( 'themeVariantLoaded', function( e ){
  console.log( e.detail.variant ); // `relearn-light`
});

Partials

The Relearn theme has been built to be as configurable as possible by defining multiple partials

In themes/hugo-theme-relearn/layouts/partials/, you will find all the partials defined for this theme. If you need to overwrite something, don't change the code directly. Instead follow this page. You'd create a new partial in the layouts/partials folder of your local project. This partial will have the priority.

This theme defines the following partials :

• header.html: the header of the page. See output-formats
• footer.html: the footer of the page. See output-formats
• body.html: the body of the page. The body may contain of one or many articles. See output-formats
• article.html: the output for a single article, can contain elements around your content. See output-formats
• menu.html: left menu. Not meant to be overwritten
• search.html: search box. Not meant to be overwritten
• custom-header.html: custom headers in page. Meant to be overwritten when adding CSS imports. Don't forget to include style HTML tag directive in your file.
• custom-footer.html: custom footer in page. Meant to be overwritten when adding JavaScript. Don't forget to include javascript HTML tag directive in your file.
• favicon.html: the favicon
• heading-pre.html: side-wide configuration to prepend to pages title headings. If you override this, it is your responsibility to take the page's headingPre setting into account.
• heading-post.html: side-wide configuration to append to pages title headings. If you override this, it is your responsibility to take the page's headingPost setting into account.
• logo.html: the logo, on top left hand corner
• meta.html: HTML meta tags, if you want to change default behavior
• menu-pre.html: side-wide configuration to prepend to menu items. If you override this, it is your responsibility to take the page's menuPre setting into account.
• menu-post.html: side-wide configuration to append to menu items. If you override this, it is your responsibility to take the page's menuPost setting into account.
• menu-footer.html: footer of the the left menu
• toc.html: table of contents
• content.html: the content page itself. This can be overridden if you want to display page's meta data above or below the content.
• content-header.html: header above the title, has a default implementation but you can overwrite it if you don't like it.
• content-footer.html: footer below the content, has a default implementation but you can overwrite it if you don't like it.