Load images on your sites lazily without JavaScript
...Note that the github-pages gem runs in safe mode and only allows a defined set of plugins. To use this gem in GitHub Pages, you need to build your site locally or use a CI (e.g. Github Workflow) and deploy to your gh-pages branch. In case you want to prevent loading some images/iframes lazily, add loading="eager" to their tags. This might be useful to prevent flickering of images during navigation (e.g. the site's logo).