@debug

Sometimes it’s useful to see the value of a variable or expression while you’re developing your stylesheet. That’s what the @debug rule is for: it’s written @debug <expression>, and it prints the value of that expression, along with the filename and line number.

  SCSS

  Sass

      
      Playground
    SCSS Syntax@mixin inset-divider-offset($offset, $padding) {
  $divider-offset: (2 * $padding) + $offset;
  @debug "divider offset: #{$divider-offset}";

  margin-left: $divider-offset;
  width: calc(100% - #{$divider-offset});
}

      
      Playground
    Sass Syntax@mixin inset-divider-offset($offset, $padding)
  $divider-offset: (2 * $padding) + $offset
  @debug "divider offset: #{$divider-offset}"

  margin-left: $divider-offset
  width: calc(100% - #{$divider-offset})

The exact format of the debug message varies from implementation to implementation. This is what it looks like in Dart Sass:

test.scss:3 Debug: divider offset: 132px

💡 Fun fact:

You can pass any value to @debug, not just a string! It prints the same representation of that value as the meta.inspect() function.