• Fixed storing user-related data before accepting cookies.
  • Fixed tab order of cookie banner, so keyboard users can access it more easily.
  • Accepting cookies no longer causes a page reload in some browsers.
  • Fixed appearance of the okay button in the free version.
  • Menu icon now useable while the cookies banner is active.
  • Loading icon is now visible while the cookies banner is active.
  • Removed cookies banner from print layout.
  • Removed inline styles from cookie banner.



  • Allow markdown in copyright string
  • Added theme_color front-matter property to micro-manage the value of the the theme-color meta tag. When not set, will use accent_color.
  • Added theme_color site setting, to set the value of themeColor in the app manifest. When not set, will use accent_color.
  • Added cookies_banner setting:

    # file: _config.yml
      cookies_banner: true

    Enabling this setting will show a notice at the top of the page to new visitors. You can change the wording of the notice in _data/strings.yml with the cookies_banner.text and cookies_banner.okay keys:

    # file: _data/strings.yml
      text: This site uses cookies.
      okay: Okay


  • Drawer no longer resizes/repaints in iOS Safari (iPhone) and Chrome for Android when the address bar autohides.
  • Fixed a bug that caused the drawer flicker/open unexpectedly when scrolling in mobile browsers.
  • Fixed how image works when using the jekyll-seo-tag plugin.


  • Changed how line breaks work in resume layout
  • Changed margins of horizontals lines


  • Updated docs
  • Updated posts



  • Allow markdown content on projects layout.
  • Renamed big_project option on projects to featured (big_project still works)


  • Fixed default font weights
  • Fixed hard-coded /projects/ URL in project layout
  • Link to feed.xml is only generated when using the jekyll-feed plugin



  • Added _sass/my-variables.scss file, which you can use to selectively override SCSS variables.
  • Font weights can now be configured via SCSS variables:
    • $font-weight for normal font.
    • $font-weight-bold for strong tags and similar.
    • $font-weight-heading for headings.


  • Message boxes will no longer span the full width, even with the break layout feature enabled.
  • Increased space between project card rows, so they look less like a brick wall.


  • Reduced the draw range of the drawer on iOS, so that a larger portion of the screen is available for zooming (a11y).
  • Default images are now optimized, so they are no longer flagged by Google PageSpeed Insights and similar tools.
  • Query parameters are no longer used for cache busting. Instead, the version number is no part of the file name for the CSS and JS resources.



  • Fix IE11 feature detection



  • Renamed no_description to hide_description. Since this feature isn’t yet documented outside of the change log, the old name will not continue to work.
  • When providing images to image, image.path, image.src, image.srcset and accent_image , it is no longer necessary to prepend the url with the baseurl of the site, e.g. values like accent_image: /assets/img/sidebar-bg.jpg are now valid.
  • Limited scope of a and img styles to content areas.
  • Upgraded KaTeX to v0.8.3
  • Upgraded jekyll-relative-links to v5.0.1


  • font and font_heading are now properly set when using the no_inline_css option #47.
  • Fixed default values for image and logo that were referring to non-existing images.
  • Added missing JS dev dependencies.


  • Updated documentation
  • Updated index, download, about and README pages.



  • Removed readme files from assets that would show up as pages when building on GitHub Pages #42.
  • Disabled push state on Firefox for iOS
  • Changed some default settings in _config.yml


  • Updated documentation


  • Removed outdated example script in my-scripts.html


License Change

The free version of Hydejack is now GPL-3.0 licensed, which is a more restrictive license than MIT (but still Open Source). This was necessary because the two major components that make up Hydejack, hy-push-state and hy-drawer, are now GPL licensed in turn.

How will this affect you?

  • If you bought the PRO version you are not affected at all.
  • You can continue to use previous versions of Hydejack according to their license (MIT).
  • If you upgrade, keep the source code in a public repository and make sure you include the new file. DO NOT publish the new code with an old license.
  • If you upgrade and make changes to the source code, you are required to make those changes available to the public under a GPL-3.0 compatible license.

The full license text is available here. You can read a summary on tl;drLegel.

If this change is not acceptable to you, DO NOT upgrade or consider buying a PRO license.

Note that the above does not constitute legal advice.


This is a major release, but almost all options and APIs that were described in the docs continue to work. Some names have changed and are no longer mentioned in the docs, but they are still part of the code and continue to work.

That being said, you should be aware of these (small) breaking changes:

  • The favicon is now located in assets/icons. To change the favicon of the page, edit favicon.ico (png) in the folder.

  • Changed the way tables work, so that they do the right thing more often. Tables are now scrollable by default, but small tables are no longer stretched to span the full width. Setting scroll-table on a larger table is sill recommended, as it will set white-space: nowrap.

  • Autogenerated ids for posts now look like post-2017-01-01-my-title instead of post-2017/01/01/my-title.

  • Event names described in the scripting chapter have changed from y-push-state-* to hy-push-state-*, except y-push-state-animationend, which has been removed. See the docs for more.


  • image has been renamed to accent_image, but image continues to work unless you add the jekyll-seo-tag plugin. This change was necessary because jekyll-seo-tag uses the image keyword to set the thumbnail image of a page. While it may be desirable to use the same image for both the sidebar and the thumbnail, the new preferred way to set sidebar images is by using the accent_image key.

  • color has been renamed to accent_color to be consistent with the new accent_image key, but color continues to work.

  • Various options that do not make sense outside the context of Hydejack (like no_push_state or no_drawer) have been moved under a common hydejack key. However, the old options continue to work.

      no_push_state: false
      no_drawer: false
  • All plugins (gems) are now optional. The gem-based version of the theme no longer uses any plugins by default, while the download version follow a “batteries-included” approach and enables some by default.

  • Links to the /assets/ folder are no longer intercepted by the push state features, which means clickable images and download links should work fine now.

  • Reader views in Firefox and Safari have an easier time recognizing the main content.

  • [Internal] No more <style> tags in the body.

  • [Internal] Content that is generated via JS (error pages, loading, etc…) is now cloned from template tags, where it is easier to modify (but before you do, check out the new _data/strings.yml file).

  • [Internal] Changed how CSS code is organized. Previously there were two versions of each CSS file for each ‘topic’, one containing core styles to be inlined into the page, the other containing those fetched asynchronously via link tag. Now there is only one file per topic, with the parts to be inlined/linked marked with comments. A script has been added to “split” the CSS into the inline/link parts. Note that this does not affect your my-*.scss files.

  • [Internal] Many CSS classnames have changes, specifically those that would conflict with Bootstrap class names.

  • [Internal] Many files in _includes have been reorganized, specially head.html and body.html have been broken up into smaller parts.

  • [Internal] The y-drawer component (MIT) has been replaced with the hy-drawer component (GPL-3.0).

  • [Internal] The y-push-state component (MIT) has been replaced with the hy-push-state component (GPL-3.0).


  • The theme now has support for the jekyll-seo-tag plugin. To use this gem, make sure you use the latest Gemfile and Gemfile.lock and run bundle install. In your config file, add jekyll-seo-tag to plugins (formerly called gems).

  • All texts that were previously hard-coded into the theme can now be configured via _data/strings.yml. This makes it possible to change certain phases without having to change source files, but it should also make it easier to use Hydejack with other languages. Time and date formats can also be configured, using Ruby’s format directives.

  • The lang key now accepts values like en-us or de_AT.

  • Made the site “mobile web app capable”
    • Added manifest.json for “Add to Homescreen” support on Android
    • Added theme-color meta tag that matches the accent_color and changes dynamically
    • Added apple-mobile-web-app-* meta tags
    • Added ieconfig.xml for “Pin to start menu” support in Windows 10.
    • Old icons and new ones are now located in assets/icons.
  • Hydejack now marks up content as structured data, to the extent possible. The resume is provided as as well as hCard, while projects are provided as You can use the Structured Data Testing Tool to see the results.

    If you do not want to expose your data in machine-readable form, you can set the no_structured_data flag to true in your config file.

      no_structured_data: true

    Note that this only applies to the resume and project layout, not the data generated by by jekyll-seo-tag (Facebook Open Graph and Twitter cards).

  • [PRO] Added “big projects”. You can make a project card span the entire content width (instead of half), by setting big_project to true in the project’s front matter.

  • [PRO] The welcome layout now has a content_separator option, which allows content to move below the “Selected/Latest Projects” and “Selected/Latest Posts” section. Usage:

    layout: welcome
    content_separator: <!--more-->
    Content above
    Content below
  • [PRO] The PRO version now has built-in support for Tinyletter. To show a newsletter subscription box below each post, set tinyletter: <username> in your config file. If you want to use a different mailing provider, you can add your own form in _includes/my-newsletter.html.

  • [PRO] The PRO version now includes styles for input elements, using the same CSS class names as Bootstrap. Check out the Bootstrap docs to learn more.

  • [PRO] Added links to random posts at the bottom of each post. This can be beneficial for search engine rankings and content discovery. You can remove them with the new post_addons option (see below).

  • [PRO] If a endDate is missing in your resume.json, it will render as “<startDate> – present”. You can change the wording in the new strings.yml file.

  • Added support for jekyll-avatar. If this plugin is enabled in your config file, it will show the avatar of your github account (, author.github.username author.github).

  • Added support for jekyll-gist.

  • You can now add links to external sites in the sidebar. Create a file like and add a title, menu, order (optional) and a redirect_to field to the front matter, e.g.:

    title: External
    menu: true

    You may combine this with the jekyll-redirect-from plugin to generate a redirect page, but this is optional.

  • You can now configure the order of complementary content below posts and projects. By default, Hydejack will show the author first (if any), the newsletter box next (if any), and related posts/projects last.

      post_addons:    [about, newsletter, related, random]
      project_addons: [about, newsletter, other]

    To change the order in the output, change to order in the array. You can also drop entries from the output by removing them from the list.

  • Added an error page that is shown when client-side network errors occur. It contains a link to retry loading the page. Previously, the browser’s default error page would have been shown.

  • Added hide_description option to pages to prevent the content of description fields to show up in the output. This allows you to use the description field in the front matter to set descriptions for search engines and sharing on social media, without having to worry about the output.

    You can activate this for all pages by adding to your config file:

      - scope:
          path: ''
          hide_description: true
  • Added a new option called no_inline_css. When true, Hydejack will generate a single CSS file to be fetched (synchronously) via link tag, instead of inlining half and including the rest via link tag.

    This option may be useful when serving content over HTTP/2, but you should perform your own tests. For more on inlining CSS, see this.

      no_inline_css: true
  • Added dns-prefetch links to Google Fonts and Google Analytics domains to further boost page load speed. These are only included when using Google Fonts/Analytics.

  • You can now define an arbitrary CSS background for the sidebar instead of just images, e.g.:

      background: 'linear-gradient(to bottom, rgba(35,62,76,1) 0%,rgba(60,146,158,1) 50%,rgba(213,213,212,1) 100%) #4fb1ba'
  • Category and tag pages can now have arbitrary content (to be shown above the list).

  • Links can now be marked for FLIP animations by adding the flip-title class. Use this for links that have the exact same text as the title of the page they are linking, e.g. [NOTICE](/NOTICE/){:.heading.flip-title}.


  • Reduced building time during development. Roughly 50% of the time was spent rebuilding the inline CSS, which is now built once and included via link tag. Production builds still inlines CSS, so the building speed remains unchanged. For more on how to improve building speeds, see here.


  • The default background image is no longer anti-selling the theme…

  • Code blocks, math blocks and tables now use as much space as there is available on the screen. Limiting the line length makes sense for paragraphs, as they are more difficult to read when they span the entire length on a large display, but it is less useful for content, like tables, long formulas or code.

    If you do not like this change, you can set no_break_layout to true in your config file.

      no_break_layout: true
  • Margin below code blocks, math blocks and tables increased from 1rem to 2rem.

  • Gray text now has a higher contrast ratio: I don’t want anybody to “suffer from design”.

  • Reduced the number of responsive breakpoints.

  • Added a hover effect on project images.

  • On mobile, footnotes will be shown as [1] instead of superscript, making them easer to tap.

  • The sidebar now has a subtle shadow on mobile, to indicate that it can be drawn from the side.

  • The sidebar now has less margin on the sides.

  • The sidebar now fits 5 social media icons, up from 4.

  • The description in the sidebar now has a smaller font size when it is longer than 100 characters. This is to encourage writing a longer description for search engines (~160 characters).

  • h1, h2 and h3 headings now have different line-heights to improve readability when they span multiple lines.

  • Marks on external links are now less opaque, but have a hover effect.

  • More responsible usage of font_heading in resume layout.

  • When hovering over a headline, a # link will appear, so that readers can link to individual headlines.

  • Changed the loading spinner to use a single icon instead of several animated divs.


  • When linking to an internal document that doesn’t match the regular content structure, the ‘hot replacement’ will no longer get stuck, and reload the page instead.
  • Fix jumping to # links after navigating to a new page.
  • Fix jumping to # links in MS Edge.
  • Fixed a bug on iOS were scrolling was blocked after closing the drawer.
  • Fixed a bug where the image used during the project FLIP animation would note be replaced with the higher resolution image after the animation in certain browsers.
  • The drawer is now less likely to be opened by accident.


  • Fixed sending incorrect paths to Google Analytics. In previous versions, Hydejack would always send the URL of the initial page for all subsequent page views. Thanks @dannydwarren for pointing this out.
  • Fixed tagline not showing up in the title.


  • Dependencies from external domains have been removed (with the exception of those that are explicitly defined and optional: Google Analytics, Google Fonts and Disqus). Instead, they are now located in the assets folder and managed via Bower.
  • KaTeX is no longer loaded on pages that do not contain math blocks.
  • preload link tags no longer use onload. Instead callbacks are registered within a script tag.
  • Code in code blocks is no longer smaller sized than inline code. To undo this change, open (or create) _sass/my-inline.scss and add the following:

    pre code { font-size: .75em; }
  • Added _includes/my-head.html, to make it easier to add things to the <head/> without modifying the source. This is especially useful when using the gem-based version of the theme.


This maintenance release includes various quality-of-life improvements when using the gem-based version of the theme.


  • Hydejack now uses additional Jekyll plugins by default, which make working with GitHub more convenient. They have been added to the Gemfile and _config.yml. Note that existing users need to update their _config.yml:

      - jekyll-default-layout # new
      - jekyll-feed
      - jekyll-optional-front-matter # new
      - jekyll-paginate
      - jekyll-redirect-from
      - jekyll-relative-links # new
      - jekyll-sitemap
  • Added licenses folder that includes the full license texts of licenses mentioned in
  • You can, once again, define the author in _config.yml. Using _data/authors.yml is still recommended (and takes precedence), but this option is more convenient when setting up a quick (project-) page using the gem-based theme. Also, a mini-version of _data/social.yml can be provided as part _config.yml, e.g.:

        name: GitHub
        icon: icon-github
        name: npm
        icon: icon-npm
        name: Download
        icon: icon-box-add
  • A download icon has been added to the default icon font and _data/social.yml has been updated.
  • Added _includes/my-scripts.html, _sass/my-inline.scss and _sass/my-style.scss to make it easier to add custom scripts and styles without modifying the source. This is especially handy when using the gem-based version of the theme.


  • Loading web fonts now starts earlier and content download no longer blocks swapping out the fallback font for the new font. Previously, a page containing lots of images could have delayed displaying the web fonts significantly.
  • The home layout no longer contains a message suggesting that you don’t use it.
  • The home layout now shows up to 5 blog posts and up to 5 pages blow the regular content.
  • The version history has been moved from docs/<version>/ to
  • The license notices have been moved from docs/<version>/ to
  • Updated gem and npm dependencies


  • The default font has been changed from “Noto Serif” to “Noto Sans”. If you have a font entry in _config.yml, this will have no effect.
  • nap.jpg is no longer used as default background image in the gem-based theme.
  • The sidebar content width is now limited to the width of the sidebar (this only effects large screens).
  • Project cards and pagination buttons now have slightly rounded borders for a less “rigid” look.

How to restore the old styles

If you would like to use the old font, add the following to _config.yml:

font_heading: "'Roboto Slab', Helvetica, Arial, sans-serif"
font:         "'Noto Serif', Georgia, serif"
google_fonts: "Roboto+Slab:700|Noto+Serif:400,400i,700,700i"

If you were relying on the default setting for the background image, add the following to _config.yml:

image: /hydejack/assets/img/nap.jpg

Note that you have to replace /hydejack with your baseurl.

To restore the old sidebar, open (or create) _sass/my-inline.scss and add the following:

@media screen { .sidebar-sticky { left: 2rem; max-width: none; } }

To remove the border radius, open (or create) _sass/my-inline.scss and add the following:

.card, .pagination-item { border-radius: 0!important; }


  • Fix invalid color hex


In this release I’ve added a “Other Projects” section to the bottom of each project page, making it easier for users to navigate through your collection and discover other projects. Also, it’s now possible to display larger (data-) tables that were previously cut off (especially on mobile devices).

For more on how to add tables, see the new section in docs/writing.

Smaller changes include a reduced usage of horizontal lines and a more “semantic” use of hr elements. Specifically, the semantics of the resume layout have been improved.


  • Added “Other Projects” section to the bottom of the project layout (similar to “Related Posts”)
  • Added CSS classes that make viewing larger (data-) tables possible
  • Added section on tables to docs/writing
  • Reduced use of <hr/> elements, using CSS borders instead.
  • Improved semantic HTML of resume
  • Follow favicon best practices and include example icons
  • Added no_google_fonts option


  • Reduced number of horizontal lines, making many layouts feel less “cluttered” (esp. blog layout)
  • Made link hover styles consistent across the board
  • Visually separated thead and tbody and tfoot within tables.
  • Changed RSS and email icons
  • Removed top margin for consecutive headings, e.g. when using h3 immediately after h2.


  • Fixed bug that caused inline math to be moved to the end of a paragraph when dynamically loading a page.
  • Fixed bug that caused layout to break in IE11.
  • Fixed bug that caused the project animation to “jump” when using long project titles.
  • No more empty attributes on img tags.


This release makes including third party plugins easier. Until now, the push state approach to loading new pages has been interfering with embedded script tags. This version changes this by simulating the sequential loading of script tags on a fresh page load.

This approach should work in a majority of cases, but can still cause problems with scripts that can’t be added more than once per page. If an issue can’t be resolved, there’s now the option to disable push state by setting disable_push_state: true in config.yml.


  • Support embedding script tags in markdown content
  • Add disable_push_state option to _config.yml
  • Add disable_drawer option to _config.yml
  • Rename syntax highlighting file to syntax.scss
  • Added chapter on third party scripts to documentation


  • Add subtle intro animation
  • Rename “Check out X for more” to “See X for more” on welcome* page
  • Replace “»” with “→” in “read more”-type of links


  • Fix default color in gem-based theme


  • Changed default color and image
  • Updated demo content
  • Finalized welcome and project page
  • Color is now fading correctly when no background image is provided
  • Added exemplary usage of excerpt separator
  • Removed social media links from welcome and about page
  • Updated dependencies


  • Add support for lang in front matter and _config.yml.
  • Add support for keywords in front matter and _config.yml.


  • Updated JS dependencies
  • Added version history and licenses to documentation
  • Fixed print layout

v6.0.0 (JavaScripten)

Hydejack has always featured a JavaScript-heavy sidebar, but other than that, JS has been used sparingly. This changes with this release, which adds a ton of (optional) code that changes the feel of the theme dramatically.


Pages are now loaded and swapped through JavaScript. This has a number of effects. First of all, it looks cool, but the animations aren’t just about aesthetics: They also help to hide the network time of fetching the next page, making the entire site feel faster. At the same time, the FOUC introduced in the last release will no longer occur (except on the initial page load).

  • Most JS is now unified in the _js directory and written in ES2016.
  • The blog-by-tag layout has been renamed to list.
  • public folder has been renamed to assets to make the theme compatible with Jekyll’s gem-based themes.
  • Tags are now supported via Jekyll Collections instead of _data.
  • The sidebar can now add links to all kinds of pages.
  • Categories are now supported.
  • Author information moved to _data/authors.yml
  • Added support for multiple authors.
  • Using jekyll-feed plugin (supported on GitHub Pages) instead of custom solution.
  • Added about layout.
  • Added not-found layout.
  • Added redirect layout

See the the migration guide for instructions on how to upgrade.


  • The “accent” font (heading font) is now used for all headings. This gives the theme a “bolder” look and was necessary for the animation: link => heading.
  • Changed default text font from “PT Serif” to “Noto Serif”.
  • Added CSS classes for styling markdown content.
  • Links have a new style. They now always display an underline to make the choice of the link color less critical (darker colors were hard to distinguish from regular text).
  • Made social media icons larger and easier to tap.
  • Social media icons are now also part of the “about” sections of a post.
  • Added support for a copyright notice at the bottom. Can be set via the config variable copyright.
  • Changed responsive breakpoints and added support for very large displays.
  • The site is now printable.
  • The blog layout now only shows the excerpt instead of the full post.
  • Links to external pages are now marked with a symbol.
  • Added margin above social media icons to prevent accidental tapping
  • Added gem files so that bundle install and bundle exec jekyll serve work
  • Disabled HTML minification when running via jekyll serve
  • Added dingbat to signal end of post


  • Related posts is no longer blank for posts that do not belong to a category.
  • Footnotes now use the text version of “leftwards arrow with hook” instead of the emoji on iOS.
  • Text is no longer invisible while waiting for Google Fonts to load.
  • Always show scrollbar to prevent layout “jumps”


a11y improvements

  • Use HTML5 semantics tags + roles
  • Don’t set maximum-scale=1
  • Fix bug with sr-only class

Math support improvements

  • LaTeX syntax errors will no longer prevent correct math blocks from being rendered
  • LaTeX syntax errors logged to console


Prevent structural FOUC


Cross-browser compatibility improvements:

  • Added features tests
  • Fixed layout in IE 10 and 11
  • Disabled stylesheets and JS in IE 9 and below.

v5.0.0 (The Fast One)

This major release increases page load speed dramatically. The page now scores roughly 90/100 on Google’s PageSpeed Insights (up from ~50) and has a high score on similar tools.

Most importantly, the critical rendering path is no longer blocked by loading styles or scripts, meaning the site becomes visible faster.

Page load speed matters to Google, but is also very apparent to visitors with slow internet connections.

However, as a side effect of these optimizations, the site now has a visible FOUC. Future versions might address this, but it is the currency in which loading speed is being payed for and can not be fully avoided.


  • HTML, CSS and JS served minified.
  • JS downloading starts only after the rest of the page is renderd.
  • Critical CSS (above-the-fold) is inlined into the document, the rest is fetched later.

In order to minify the CSS and make it more modular it has been rewritten in SCSS.


  • Colored focus outline in page color
  • Tabindex for tab navigation
  • Social media icons easier tappable with finger


Not strictly part of the release, but the images have been blurred to increase text readability and help with loading speed as well (burred images get compressed by JPG much better).


Fix per-page color and image

v4.0.0 (Social Media Impocalypse)


  • Structure of _config.yml has changed
    • Social media usernames are now located under author: social: <platform>: <username>.
    • disqus is now a top-level entry (moved from author).
    • Now has font, font_accent and google_fonts fields that are mandatory.
  • Now defaults to the blog layout, old style is available via blog-by-tag layout, see archive.html.

New features

  • Added a lot of social media icons, configurable via _config.yml.
  • New blog layout. Classic, paginated.
  • Fonts are configurable via _config.yml.


  • Link underlines are now fixed-sized for all font sizes (no thicker lines for headlines, etc)


  • Correctly set the meta description field using either the description field or post.excerpt as a fallback (used to contain the unmodified markdown).
  • Fixed various URL bugs relating to site.baseurl.


  • Refactoring, preventing code duplications, heavier usage of includes.

v3.0.0 (Hydejack)

Hydejack is a pretentious two-column Jekyll theme, stolen by @qwtel from Hyde. You could say it was.. hydejacked.


Unlike Hyde, it’s very opinionated about how you are going to use it.

Features include:

  • Touch-enabled sidebar / drawer for mobile, including fallback when JS is disabled.
  • Github Pages compatible tag support based on this post.
  • Customizable link color and sidebar image, per-site, per-tag and per-post.
  • Optional author section at the bottom of each post.
  • Optional comment section powered by Disqus.
  • Layout for posts grouped by year
  • Wide array of social media icons on sidebar.
  • Math blocks via KaTeX.

v2.0.0 (Hyde)

v1.0.0 (Hyde)

© Casey Youngflesh 2024 - All rights reserved

Created with Jekyll and Hydejack v7.4.1