v1.101.0

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• Potentially breaking bug fix: The Node package importer now properly
  supports resolving import-only variants of Sass files declared in the
  exports, sass, and style fields of package.json. Previously, these
  files were ignored even when loaded via @import, so any code relying on
  loading module-system-only files this way may break.

v1.100.0

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• Writing two compound selectors adjacent to one another without any whitespace
  between them, such as [class]a, is now deprecated. This was always an error
  in CSS and Sass only supported it by mistake.

  See the Sass website for
  details.

v1.99.0

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• Add support for parent selectors (&) at the root of the document. These are
  emitted as-is in the CSS output, where they're interpreted as the scoping
  root.

• User-defined functions named calc or clamp are no longer forbidden. If
  such a function exists without a namespace in the current module, it will be
  used instead of the built-in calc() or clamp() function.

• User-defined functions whose names begin with - and end with -expression,
  -url, -and, -or, or -not are no longer forbidden. These were
  originally intended to match vendor prefixes, but in practice no vendor
  prefixes for these functions ever existed in real browsers.

• User-defined functions named EXPRESSION, URL, and ELEMENT, those that
  begin with - and end with -ELEMENT, as well as the same names with some
  lowercase letters are now deprecated, These are names conflict with plain CSS
  functions that have special syntax.

  See the Sass website for details.

• In a future release, calls to functions whose names begin with - and end
  with -expression and -url will no longer have special parsing. For now,
  these calls are deprecated if their behavior will change in the future.

  See the Sass website for details.

• Calls to functions whose names begin with - and end with -progid:... are
  deprecated.

  See the Sass website for details.

v1.98.0

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Command-Line Interface

• Gracefully handle dependency loops in --watch mode.

Dart API

• Add a const Logger.defaultLogger field. This provides a logger that emits to
  standard error or the browser console, but automatically chooses whether to
  use terminal colors.

JavaScript API

• Fix a crash when manually constructing a SassCalculation for 'calc' with
  an argument that can't be simplified.

• Properly emit deprecation warnings as text rather than StringBuffer objects
  when running in a browser.

• Emit colored warnings and other messages on the console when running in a
  browser.

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.

v1.93.2

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• No user-visible changes.

JavaScript API

• Fix another error in the release process for @sass/types.

v1.93.1

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• No user-visible changes.

JavaScript API

• Fix an error in the release process for @sass/types.

v1.93.0

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• Fix a crash when a style rule contains a nested @import, and the loaded file
  @uses a user-defined module as well as @includes a top-level mixin which
  emits top-level declarations.

JavaScript API

• Release a @sass/types package which contains the type annotations used by
  both the sass and sass-embedded package without any additional code or
  dependencies.

v1.92.1

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• Fix a bug where variable definitions from one imported, forwarded module
  would not be passed as implicit configuration to a later imported, forwarded
  module.

v1.92.0

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• Breaking change: Emit declarations, childless at-rules, and comments in
  the order they appear in the source even when they're interleaved with nested
  rules. This obsoletes the mixed-decls deprecation.

• Breaking change: The function name type() is now fully reserved for the
  plain CSS function. This means that @function definitions with the name
  type will produce errors, while function calls will be parsed as special
  function strings.

• Configuring private variables using @use ... with, @forward ... with, and
  meta.load-css(..., $with: ...) is now deprecated. Private variables were
  always intended to be fully encapsulated within the module that defines them,
  and this helps enforce that encapsulation.

• Fix a bug where @extend rules loaded through a mixture of @import and
  @use rules could fail to apply correctly.

Command-Line Interface

• In --watch mode, delete the source map when the associated source file is
  deleted.

v1.91.0

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• Potentially breaking change: meta.inspect() (as well as other systems
  that use it such as @debug and certain error messages) now emits numbers
  with as high precision as is available instead of rounding to the nearest
  1e−10 as we do when serializing to CSS. This better fits the purpose of
  meta.inspect(), which is to provide full information about the structure of
  a Sass value.

• Passing a rest argument ($arg...) before a positional or named argument when
  calling a function or mixin is now deprecated. This was always outside the
  specified syntax, but it was historically treated the same as passing the rest
  argument at the end of the argument list whether or not that matched the
  visual order of the arguments.

v1.90.0

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• Allow a @forwarded module to be loaded with a configuration when that module
  has already been loaded with a different configuration and the module
  doesn't define any variables that would have been configured anyway.

v1.89.2

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Embedded Host

• Fixed a compilation error caused by an outdated buf dependency.

v1.89.1

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• No user-visible changes.

v1.89.0

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• Allow the Node package importer to load files even when there are multiple
  potential resolutions, as long as those resolutions all point to the same
  file.

v1.88.0

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• Allow custom properties with empty values (such as --var:;).

• Fix a bug when calculating source spans for interpolations.

Dart and JS APIs

• Potentially breaking bug fix: Throw an error when passing a function or
  mixin object from one compilation to another.

Dart API

• Deprecate passing a relative URL to compileString() and related functions.

v1.87.0

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• Potentially breaking bug fix: When a plain CSS file with a top-level
  nesting selector & is loaded into a nested Sass context via
  meta.load-css() or @import, Sass now emits plain CSS nesting rather than
  incorrectly combining it with the parent selector using a descendant
  combinator.

v1.86.3

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• Fix a bug introduced in 1.86.1 where Sass fails to resolve paths starting with
  a .. segment.

v1.86.2

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• No user-visible changes.

v1.86.1

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• Improve the performance of file: URL case canonicalization on Windows and
  Mac OS.

v1.86.0

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• Add support for % as an expression in its own right. It will still be parsed
  as the modulo operator when between two other expressions, but in any other
  context it will be an expression whose value is the unquoted string %.

• Consider attr() to be a special number function that can be used as a
  channel in color functions.

• Deprecate user-defined functions named type() so that we can eventually
  support the new CSS type() function.

Dart API

• Increase the minimum Dart SDK to 3.6.0.

v1.85.1

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• Fix a bug where global Sass functions whose names overlap with CSS math
  functions could incorrectly be treated as CSS math functions even though they
  used Sass-only features, causing compilation failures. For example,
  round(-$var / 2) previously threw an error but now works as intended.

v1.85.0

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• No longer fully trim redundant selectors generated by @extend. This caused
  unacceptable performance issues for certain heavy users of @extend. We'll
  try to find a more performant way to accomplish it in the future.

v1.84.0

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• Allow newlines in whitespace in the indented syntax.

• Potentially breaking bug fix: Selectors with unmatched brackets now always
  produce a parser error. Previously, some edge cases like [foo#{"]:is(bar"}) {a: b} would compile without error, but this was an unintentional bug.

• Fix a bug in which various Color Level 4 functions weren't allowed in plain
  CSS.

• Fix the error message for @extend without a selector and possibly other
  parsing edge-cases in contexts that allow interpolation.

Embedded Host

• Fixed the implementation of the SassBoolean type to adhere to the spec,
  now using a class instead of an interface.

v1.83.4

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• No user-visible changes.

v1.83.3

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• No user-visible changes.

v1.83.2

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• Properly display deprecation IDs for the JS Sass API.

• Don't display deprecation IDs for user-defined deprecations.

v1.83.1

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• Fix a bug where --quiet-deps would get deactivated for @content blocks,
  even when those blocks were entirely contained within dependencies.

• Include deprecation IDs in deprecation warnings to make it easier to determine
  what to pass to --silence-deprecation or --fatal-deprecation.

v1.83.0

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• Allow trailing commas in all argument and parameter lists.

v1.82.0

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Command-Line Interface

• Improve --watch mode reliability when making multiple changes at once, such
  as checking out a different Git branch.

• Parse the calc-size() function as a calculation now that it's supported in
  some browsers.

Dart API

• Add a SassCalculation.calcSize() function.

v1.81.1

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• No user-visible changes.

v1.81.0

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• Fix a few cases where deprecation warnings weren't being emitted for global
  built-in functions whose names overlap with CSS calculations.

• Add support for the CSS round() calculation with a single argument, as long
  as that argument might be a unitless number.

v1.80.7

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Embedded Host

• Don't treat 0 as undefined for the green and blue channels in the
  LegacyColor constructor.

v1.80.6

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Command-Line Interface

• Make @parcel/watcher an optional dependency so this can still be installed
  on operating systems where it's unavailable.

v1.80.5

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Embedded Host

• Don't produce phantom @import deprecations when using an importer with the
  legacy API.

v1.80.4

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• No user-visible changes.

v1.80.3

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• Fix a bug where @import url("...") would crash in plain CSS files.

• Improve consistency of how warnings are emitted by different parts of the
  compiler. This should result in minimal user-visible changes, but different
  types of warnings should now respond more reliably to flags like --quiet,
  --verbose, and --silence-deprecation.