sass_api library

We strongly recommend importing this library with the prefix sass.

Classes

Argument
An argument declared as part of an ArgumentDeclaration.
ArgumentDeclaration
An argument declaration, as for a function or mixin definition.
ArgumentInvocation
A set of arguments passed in to a function or mixin.
AstNode
A node in an abstract syntax tree.
AsyncCallable
An interface for functions and mixins that can be invoked from Sass by passing in arguments.
AsyncImportCache
An in-memory cache of parsed stylesheets that have been imported by Sass.
AsyncImporter
An interface for importers that resolves URLs in @imports to the contents of Sass files.
AtRootRule
An @at-root rule.
AtRule
An unknown at-rule.
AttributeSelector
An attribute selector.
BinaryOperationExpression
A binary operator, as in 1 + 2 or $this and $other.
BooleanExpression
A boolean literal, true or false.
CalculationInterpolation
A deprecated representation of a string injected into a SassCalculation using interpolation.
CalculationOperation
A binary operation that can appear in a SassCalculation.
Callable
An interface for functions and mixins that can be invoked from Sass by passing in arguments.
CallableDeclaration
An abstract class for callables (functions or mixins) that are declared in user code.
CallableInvocation
An abstract class for invoking a callable (a function or mixin).
ClassSelector
A class selector.
ColorChannel
Metadata about a single channel in a known color space.
ColorExpression
A color literal.
ColorSpace
A color space whose channel names and semantics Sass knows.
CompileResult
The result of compiling a Sass document to CSS, along with metadata about the compilation process.
ComplexSelector
A complex selector.
ComplexSelectorComponent
A component of a ComplexSelector.
CompoundSelector
A compound selector.
ConfiguredVariable
A variable configured by a with clause in a @use or @forward rule.
ContentBlock
An anonymous block of code that's invoked for a ContentRule.
ContentRule
A @content rule.
DebugRule
A @debug rule.
Declaration
A declaration (that is, a name: value pair).
DependencyReport
A struct of different types of dependencies a Sass stylesheet can contain.
DynamicImport
An import that will load a Sass file at runtime.
EachRule
An @each rule.
ElseClause
An @else clause in an @if rule.
ErrorRule
An @error rule.
Expression
A SassScript expression in a Sass syntax tree.
ExpressionVisitor<T>
An interface for visitors that traverse SassScript expressions.
ExtendRule
An @extend rule.
FilesystemImporter
An importer that loads files from a load path on the filesystem, either relative to the path passed to FilesystemImporter.new or absolute file: URLs.
ForRule
A @for rule.
ForwardRule
A @forward rule.
FunctionExpression
A function invocation.
FunctionRule
A function declaration.
GamutMapMethod
Different algorithms that can be used to map an out-of-gamut Sass color into the gamut for its color space.
IDSelector
An ID selector.
IfClause
An @if or @else if clause in an @if rule.
IfExpression
A ternary expression.
IfRule
An @if rule.
IfRuleClause
The superclass of @if and @else clauses.
Import
An abstract superclass for different types of import.
ImportCache
An in-memory cache of parsed stylesheets that have been imported by Sass.
Importer
An interface for importers that resolves URLs in @imports to the contents of Sass files.
ImporterResult
The result of importing a Sass stylesheet, as returned by Importer.load.
ImportRule
An @import rule.
IncludeRule
A mixin invocation.
InterpolatedFunctionExpression
An interpolated function invocation.
Interpolation
Plain text interpolated with Sass expressions.
InterpolationMap
A map from locations in a string generated from an Interpolation to the original source code in the interpolation.
InterpolationMethod
The method by which two colors are interpolated to find a color in the middle.
LinearChannel
Metadata about a color channel with a linear (as opposed to polar) value.
ListExpression
A list literal.
Logger
An interface for loggers that print messages produced by Sass stylesheets.
LoudComment
A loud CSS-style comment.
MapExpression
A map literal.
MediaRule
A @media rule.
MixinRule
A mixin declaration.
NullExpression
A null literal.
NumberExpression
A number literal.
PackageImporter
An importer that loads stylesheets from package: imports.
ParenthesizedExpression
An expression wrapped in parentheses.
ParentSelector
A selector that matches the parent in the Sass stylesheet.
ParentStatement<T extends List<Statement>?>
A Statement that can have child statements.
PlaceholderSelector
A placeholder selector.
PseudoSelector
A pseudo-class or pseudo-element selector.
QualifiedName
A qualified name.
ReturnRule
A @return rule.
SassArgumentList
A SassScript argument list.
SassBoolean
A SassScript boolean value.
SassCalculation
A SassScript calculation.
SassColor
A SassScript color.
SassDeclaration
A common interface for any node that declares a Sass member.
SassDependency
A common interface for UseRules, ForwardRules, and DynamicImports.
SassFunction
A SassScript function reference.
SassList
A SassScript list.
SassMap
A SassScript map.
SassMixin
A SassScript mixin reference.
SassNode
A node in the abstract syntax tree for an unevaluated Sass or SCSS file.
SassNumber
A SassScript number.
SassReference
A common interface for any node that references a Sass member.
SassString
A SassScript string.
Selector
A node in the abstract syntax tree for a selector.
SelectorExpression
A parent selector reference, &.
SelectorList
A selector list.
SelectorVisitor<T>
An interface for visitors that traverse selectors.
SilentComment
A silent Sass-style comment.
SimpleSelector
An abstract superclass for simple selectors.
Statement
A statement in a Sass syntax tree.
StatementVisitor<T>
An interface for visitors that traverse Sass statements.
StaticImport
An import that produces a plain CSS @import rule.
StringExpression
A string literal.
StyleRule
A style rule.
Stylesheet
A Sass stylesheet.
SupportsAnything
A supports condition that represents the forwards-compatible <general-enclosed> production.
SupportsCondition
An abstract class for defining the condition a @supports rule selects.
SupportsDeclaration
A condition that selects for browsers where a given declaration is supported.
SupportsExpression
An expression-level @supports condition.
SupportsFunction
A function-syntax condition.
SupportsInterpolation
An interpolated condition.
SupportsNegation
A negated condition.
SupportsOperation
An operation defining the relationship between two conditions.
SupportsRule
A @supports rule.
TypeSelector
A type selector.
UnaryOperationExpression
A unary operator, as in +$var or not fn().
UniversalSelector
Matches any element in the given namespace.
UseRule
A @use rule.
Value
A SassScript value.
ValueExpression
An expression that directly embeds a Value.
VariableDeclaration
A variable declaration.
VariableExpression
A Sass variable.
WarnRule
A @warn rule.
WhileRule
A @while rule.

Enums

AttributeOperator
An operator that defines the semantics of an AttributeSelector.
BinaryOperator
A binary operator constant.
CalculationOperator
An enumeration of possible operators for CalculationOperation.
Combinator
A combinator that defines the relationship between selectors in a ComplexSelector.
Deprecation
A deprecated feature in the language.
HueInterpolationMethod
The method by which two hues are adjusted when interpolating between colors.
ListSeparator
An enum of list separator types.
OutputStyle
An enum of generated CSS styles.
Syntax
An enum of syntaxes that Sass can parse.
UnaryOperator
A unary operator constant.

Mixins

AstSearchVisitor<T>
A visitor that recursively traverses each statement and expression in a Sass AST whose visit* methods default to returning null, but which returns the first non-null value returned by any method.
RecursiveAstVisitor
A visitor that recursively traverses each statement and expression in a Sass AST.
RecursiveSelectorVisitor
A visitor that recursively traverses each component of a Selector AST.
RecursiveStatementVisitor
A visitor that recursively traverses each statement in a Sass AST.
ReplaceExpressionVisitor
A visitor that recursively traverses each expression in a SassScript AST and replaces its contents with the values returned by nested recursion.
SelectorSearchVisitor<T>
A SelectorVisitor whose visit* methods default to returning null, but which returns the first non-null value returned by any method.
StatementSearchVisitor<T>
A StatementVisitor whose visit* methods default to returning null, but which returns the first non-null value returned by any method.

Extensions

SassApiColorSpace on ColorSpace
ColorSpace methods that are only visible through the sass_api package.
SassApiValue on Value
Extension methods that are only visible through the sass_api package.

Constants

sassFalse → const SassBoolean Value
The SassScript false value.
sassNull → const Value Value
The SassScript null value.
sassTrue → const SassBoolean Value
The SassScript true value.

Functions

compile(String path, {bool color = false, Logger? logger, Iterable<Importer>? importers, Iterable<String>? loadPaths, PackageConfig? packageConfig, Iterable<Callable>? functions, OutputStyle? style, bool quietDeps = false, bool verbose = false, void sourceMap(SingleMapping map)?, bool charset = true}) → String
Like compileToResult, but returns CompileResult.css rather than returning CompileResult directly.
compileAsync(String path, {bool color = false, Logger? logger, Iterable<AsyncImporter>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<AsyncCallable>? functions, OutputStyle? style, bool quietDeps = false, bool verbose = false, void sourceMap(SingleMapping map)?}) → Future<String>
Like compile, except it runs asynchronously.
compileString(String source, {Syntax? syntax, bool color = false, Logger? logger, Iterable<Importer>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<Callable>? functions, OutputStyle? style, Importer? importer, Object? url, bool quietDeps = false, bool verbose = false, void sourceMap(SingleMapping map)?, bool charset = true, bool indented = false}) → String
Like compileStringToResult, but returns CompileResult.css rather than returning CompileResult directly.
compileStringAsync(String source, {Syntax? syntax, bool color = false, Logger? logger, Iterable<AsyncImporter>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<AsyncCallable>? functions, OutputStyle? style, AsyncImporter? importer, Object? url, bool quietDeps = false, bool verbose = false, void sourceMap(SingleMapping map)?, bool charset = true, bool indented = false}) → Future<String>
Like compileString, except it runs asynchronously.
compileStringToResult(String source, {Syntax? syntax, bool color = false, Logger? logger, Iterable<Importer>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<Callable>? functions, OutputStyle? style, Importer? importer, Object? url, bool quietDeps = false, bool verbose = false, bool sourceMap = false, bool charset = true, Iterable<Deprecation>? silenceDeprecations, Iterable<Deprecation>? fatalDeprecations, Iterable<Deprecation>? futureDeprecations}) → CompileResult
Compiles source to CSS and returns a CompileResult containing the CSS and additional metadata about the compilation..
compileStringToResultAsync(String source, {Syntax? syntax, bool color = false, Logger? logger, Iterable<AsyncImporter>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<AsyncCallable>? functions, OutputStyle? style, AsyncImporter? importer, Object? url, bool quietDeps = false, bool verbose = false, bool sourceMap = false, bool charset = true, Iterable<Deprecation>? silenceDeprecations, Iterable<Deprecation>? fatalDeprecations, Iterable<Deprecation>? futureDeprecations}) → Future<CompileResult>
Like compileStringToResult, except it runs asynchronously.
compileToResult(String path, {bool color = false, Logger? logger, Iterable<Importer>? importers, Iterable<String>? loadPaths, PackageConfig? packageConfig, Iterable<Callable>? functions, OutputStyle? style, bool quietDeps = false, bool verbose = false, bool sourceMap = false, bool charset = true, Iterable<Deprecation>? silenceDeprecations, Iterable<Deprecation>? fatalDeprecations, Iterable<Deprecation>? futureDeprecations}) → CompileResult
Loads the Sass file at path, compiles it to CSS, and returns a CompileResult containing the CSS and additional metadata about the compilation.
compileToResultAsync(String path, {bool color = false, Logger? logger, Iterable<AsyncImporter>? importers, PackageConfig? packageConfig, Iterable<String>? loadPaths, Iterable<AsyncCallable>? functions, OutputStyle? style, bool quietDeps = false, bool verbose = false, bool sourceMap = false, bool charset = true, Iterable<Deprecation>? silenceDeprecations, Iterable<Deprecation>? fatalDeprecations, Iterable<Deprecation>? futureDeprecations}) → Future<CompileResult>
Like compileToResult, except it runs asynchronously.
fakeFromImport<T>(T callback()) → T
Runs callback in a context where AsyncImporter.fromImport returns true.
findDependencies(Stylesheet stylesheet) → DependencyReport
Returns stylesheet's statically-declared dependencies.
isIdentifier(String text) → bool Parsing
Returns whether text is a valid CSS identifier.
parseIdentifier(String text) → String Parsing
Parses text as a CSS identifier and returns the result.
warn(String message, {bool deprecation = false}) → void
Prints a warning message associated with the current @import or function call.

Typedefs

AsyncCanonicalizeResult = (AsyncImporter, Uri, {Uri originalUrl})
A canonicalized URL and the importer that canonicalized it.
CanonicalizeResult = (Importer, Uri, {Uri originalUrl})
A canonicalized URL and the importer that canonicalized it.

Exceptions / Errors

SassException
An exception thrown by Sass.
SassFormatException
An exception thrown when Sass parsing has failed.