v1.66.1

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JS API

• Fix a bug where Sass compilation could crash in strict mode if passed a
  callback that threw a string, boolean, number, symbol, or bignum.

v1.66.0

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• Breaking change: Drop support for the additional CSS calculations defined
  in CSS Values and Units 4. Custom Sass functions whose names overlapped with
  these new CSS functions were being parsed as CSS calculations instead, causing
  an unintentional breaking change outside our normal [compatibility policy] for
  CSS compatibility changes.

  Support will be added again in a future version, but only after Sass has
  emitted a deprecation warning for all functions that will break for at least
  three months prior to the breakage.

v1.65.1

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• Update abs-percent deprecatedIn version to 1.65.0.

v1.65.0

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• All functions defined in CSS Values and Units 4 are now parsed as calculation
  objects: round(), mod(), rem(), sin(), cos(), tan(), asin(),
  acos(), atan(), atan2(), pow(), sqrt(), hypot(), log(), exp(),
  abs(), and sign().

• Deprecate explicitly passing the % unit to the global abs() function. In
  future releases, this will emit a CSS abs() function to be resolved by the
  browser. This deprecation is named abs-percent.

v1.64.2

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• No user-visible changes.

v1.64.1

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Embedded Sass

• Fix a bug where a valid SassCalculation.clamp() with less than 3 arguments
  would throw an error.

v1.64.0

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• Comments that appear before or between @use and @forward rules are now
  emitted in source order as much as possible, instead of always being emitted
  after the CSS of all module dependencies.

• Fix a bug where an interpolation in a custom property name crashed if the file
  was loaded by a @use nested in an @import.

JavaScript API

• Add a new SassCalculation type that represents the calculation objects added
  in Dart Sass 1.40.0.

• Add Value.assertCalculation(), which returns the value if it's a
  SassCalculation and throws an error otherwise.

• Produce a better error message when an environment that supports some Node.js
  APIs loads the browser entrypoint but attempts to access the filesystem.

Embedded Sass

• Fix a bug where nested relative @imports failed to load when using the
  deprecated functions render or renderSync and those relative imports were
  loaded multiple times across different files.

v1.63.6

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JavaScript API

• Fix import sass from 'sass' again after it was broken in the last release.

Embedded Sass

• Fix the exports declaration in package.json.

v1.63.5

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JavaScript API

• Fix a bug where loading the package through both CJS require() and ESM
  import could crash on Node.js.

Embedded Sass

• Fix a deadlock when running at high concurrency on 32-bit systems.

• Fix a race condition where the embedded compiler could deadlock or crash if a
  compilation ID was reused immediately after the compilation completed.

v1.63.4

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JavaScript API

• Re-enable support for import sass from 'sass' when loading the package from
  an ESM module in Node.js. However, this syntax is now deprecated; ESM users
  should use import * as sass from 'sass' instead.

  On the browser and other ESM-only platforms, only import * as sass from 'sass' is supported.

• Properly export the legacy API values TRUE, FALSE, NULL, and types from
  the ECMAScript module API.

Embedded Sass

• Fix a race condition where closing standard input while requests are in-flight
  could sometimes cause the process to hang rather than shutting down
  gracefully.

• Properly include the root stylesheet's URL in the set of loaded URLs when it
  fails to parse.

v1.63.3

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JavaScript API

• Fix loading Sass as an ECMAScript module on Node.js.

v1.63.2

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• No user-visible changes.

v1.63.1

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• No user-visible changes.

v1.63.0

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JavaScript API

• Dart Sass's JS API now supports running in the browser. Further details and
  instructions for use are in the README.

Embedded Sass

• The Dart Sass embedded compiler is now included as part of the primary Dart
  Sass distribution, rather than a separate executable. To use the embedded
  compiler, just run sass --embedded from any Sass executable (other than the
  pure JS executable).

  The Node.js embedded host will still be distributed as the sass-embedded
  package on npm. The only change is that it will now provide direct access to a
  sass executable with the same CLI as the sass package.

• The Dart Sass embedded compiler now uses version 2.0.0 of the Sass embedded
  protocol. See the spec for a full description of the
  protocol, and the changelog for a summary of
  changes since version 1.2.0.

• The Dart Sass embedded compiler now runs multiple simultaneous compilations in
  parallel, rather than serially.

v1.62.1

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• Fix a bug where :has(+ &) and related constructs would drop the leading
  combinator.

v1.62.0

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• Deprecate the use of multiple !global or !default flags on the same
  variable. This deprecation is named duplicate-var-flags.

• Allow special numbers like var() or calc() in the global functions:
  grayscale(), invert(), saturate(), and opacity(). These are also
  native CSS filter functions. This is in addition to number values which were
  already allowed.

• Fix a cosmetic bug where an outer rule could be duplicated after nesting was
  resolved, instead of re-using a shared rule.

v1.61.0

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• Potentially breaking change: Drop support for End-of-Life Node.js 12.

• Fix remaining cases for the performance regression introduced in 1.59.0.

Embedded Sass

• The JS embedded host now loads files from the working directory when using the
  legacy API.