Importer class Null safety Importer

An interface for importers that resolves URLs in @imports to the contents of Sass files.

Importers should override toString to provide a human-readable description of the importer. For example, the default filesystem importer returns its load path.

This extends AsyncImporter to guarantee that canonicalize and load are synchronous. It's usable with both the synchronous and asynchronous compile() functions, and as such should be extended in preference to AsyncImporter if possible.

Subclasses should extend Importer, not implement it.

Inheritance
Implementers

Constructors

Importer()

Properties

fromImport bool
Whether the current canonicalize invocation comes from an @import rule. [...]
@nonVirtual, @protected, read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

canonicalize(Uri url) Uri?
If url is recognized by this importer, returns its canonical format. [...]
override
couldCanonicalize(Uri url, Uri canonicalUrl) bool
Without accessing the filesystem, returns whether or not passing url to canonicalize could possibly return canonicalUrl. [...]
override
load(Uri url) ImporterResult?
Loads the Sass text for the given url, or returns null if this importer can't find the stylesheet it refers to. [...]
override
modificationTime(Uri url) DateTime
Returns the time that the Sass file at url was last modified. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited

Static Properties

noOp Importer
An importer that never imports any stylesheets. [...]
final