Add custom CSS classes to images with Hugo's Markdown attributes

Note: You need to run Hugo ⩾ 0.81.

In config.toml

[markup.goldmark.parser.attribute]
block = true
title = true

or in config.yml

markup:
  goldmark:
    parser:
      attribute:
        block: true
        title: true

See the theme’s documentation

![Image description](/images/portfolio/theme-screenshot.jpg)
{.custom-css-class}

![Image description](/images/portfolio/theme-screenshot.jpg)
{.myclass class="custom-css-class1 custom-class2"}

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