v1.97.3

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• Fix a bug where nesting an at-rule within multiple style rules in plain CSS
  could cause outer style rules to be omitted.

v1.97.2

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• Additional fixes for implicit configuration when nested imports are involved.

v1.97.1

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v1.97.0

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• Add support for the display-p3-linear color space.

v1.96.0

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• Allow numbers with complex units (more than one numerator unit or more than
  zero denominator units) to be emitted to CSS. These are now emitted as
  calc() expressions, which now support complex units in plain CSS.

v1.95.1

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• No user-visible changes.

v1.95.0

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• Add support for the CSS-style if() function. In addition to supporting the
  plain CSS syntax, this also supports a sass() query that takes a Sass
  expression that evaluates to true or false at preprocessing time depending
  on whether the Sass value is truthy. If there are no plain-CSS queries, the
  function will return the first value whose query returns true during
  preprocessing. For example, if(sass(false): 1; sass(true): 2; else: 3)
  returns 2.

• The old Sass if() syntax is now deprecated. Users are encouraged to migrate
  to the new CSS syntax. if($condition, $if-true, $if-false) can be changed to
  if(sass($condition): $if-true; else: $if-false).

  See the Sass website for details.

• Plain-CSS if() functions are now considered "special numbers", meaning that
  they can be used in place of arguments to CSS color functions.

• Plain-CSS if() functions and attr() functions are now considered "special
  variable strings" (like var()), meaning they can now be used in place of
  multiple arguments or syntax fragments in various CSS functions.

v1.94.3

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• Fix the span reported for standalone % expressions followed by whitespace.

v1.94.2

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Command-Line Interface

• Using --fatal-deprecation <version> no longer emits warnings about
  deprecations that are obsolete.

Dart API

• Deprecation.forVersion now excludes obsolete deprecations from the set it
  returns.

JS API

• Excludes obsolete deprecations from fatalDeprecations when a Version is
  passed.

Node.js Embedded Host

• Fix a bug where a variable could be used before it was initialized during
  async compilation.

v1.94.1

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• No user-visible changes.

v1.94.0

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• Potentially breaking compatibility fix: @function rules whose names
  begin with -- are now parsed as unknown at-rules to support the plain CSS
  @function rule. Within this rule, the result property is parsed as raw
  CSS just like custom properties.

• Potentially breaking compatibility fix: @mixin rules whose names begin
  with -- are now errors. These are not yet parsed as unknown at-rules because
  no browser currently supports CSS mixins.

v1.93.3

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• Fix a performance regression that was introduced in 1.92.0.