CodePen Embed - Optgroup Example

select
  optgroup(label="HTML")
    option Pug
    option Haml
    option Markdown
  optgroup(label="CSS")
    option SCSS
    option Less
    option PostCSS
  optgroup(label="Javascript")
    option TypeScript
    option Babel
    option CoffeeScript

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select {
  margin: 30px;
}

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