CSSStyleDeclaration class

The CSSStyleDeclaration interface represents an object that is a CSS declaration block, and exposes style information and various style-related methods and properties.

A CSSStyleDeclaration object can be exposed using three different APIs:

Via HTMLElement.style, which deals with the inline styles of a single element (e.g.,
).
Via the CSSStyleSheet API. For example, document.styleSheets0.cssRules0.style returns a CSSStyleDeclaration object on the first CSS rule in the document's first stylesheet.
Via Window.getComputedStyle(), which exposes the CSSStyleDeclaration object as a read-only interface.

Inheritance

Mixed-in types

StaticDefinedBindingObject

Implementers

ComputedCSSStyleDeclaration

Available extensions

Constructors

CSSStyleDeclaration([BindingContext? context])
CSSStyleDeclaration.computedStyle(Element? target, Map<String, dynamic>? defaultStyle, StyleChangeListener? onStyleChanged, [StyleFlushedListener? onStyleFlushed])

Properties

asyncMethods → List<StaticDefinedAsyncBindingObjectMethodMap>: no setterinherited
contextId → double?: no setterinherited
cssText → String: Textual representation of the declaration block. Setting this attribute changes the style.
no setter
defaultStyle ↔ Map<String, dynamic>?: getter/setter pair
dynamicMethods → Map<String, BindingObjectMethod>: no setterinherited
dynamicProperties → Map<String, BindingObjectProperty>: no setterinherited
first → dynamic: The first element.
no setterinherited
firstOrNull → T?: Available on Iterable<T>, provided by the IterableExtensions extension
The first element of this iterator, or null if the iterable is empty.
no setter
hashCode → int: The hash code for this object.
no setterinherited
hasImportantDeclarations → bool: no setter
hasInheritedPendingProperty → bool: no setter
hasPendingProperties → bool: no setter
indexed → Iterable<(int, T)>: Available on Iterable<T>, provided by the IterableExtensions extension
Pairs of elements of the indices and elements of this iterable.
no setter
isEmpty → bool: Whether this collection has no elements.
no setterinherited
isNotEmpty → bool: Whether this collection has at least one element.
no setterinherited
iterator → Iterator<MapEntry<String, CSSPropertyValue>>: A new Iterator that allows iterating the elements of this Iterable.
no setteroverride
last → dynamic: The last element.
no setterinherited
lastOrNull → T?: Available on Iterable<T>, provided by the IterableExtensions extension
The last element of this iterable, or null if the iterable is empty.
no setter
length → int: The number of properties.
no setteroverride
methods → List<StaticDefinedSyncBindingObjectMethodMap>: no setterinherited
nonNulls → Iterable<T>: Available on Iterable<T?>, provided by the NullableIterableExtensions extension
The non-null elements of this iterable.
no setter
onStyleChanged ↔ StyleChangeListener?: getter/setter pair
onStyleFlushed ↔ StyleFlushedListener?: getter/setter pair
ownerView → WebFViewController: no setterinherited
pointer → Pointer<NativeBindingObject>?: no setterinherited
properties → List<StaticDefinedBindingPropertyMap>: no setterinherited
pseudoAfterStyle ↔ CSSStyleDeclaration?: getter/setter pair
pseudoBeforeStyle ↔ CSSStyleDeclaration?: getter/setter pair
pseudoFirstLetterStyle ↔ CSSStyleDeclaration?: getter/setter pair
pseudoFirstLineStyle ↔ CSSStyleDeclaration?: getter/setter pair
resolvedPseudoAfterStyle → CSSStyleDeclaration?: no setter
resolvedPseudoBeforeStyle → CSSStyleDeclaration?: no setter
resolvedPseudoFirstLetterStyle → CSSStyleDeclaration?: no setter
resolvedPseudoFirstLineStyle → CSSStyleDeclaration?: no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
single → dynamic: Checks that this iterable has only one element, and returns that element.
no setterinherited
singleOrNull → T?: Available on Iterable<T>, provided by the IterableExtensions extension
The single element of this iterator, or null.
no setter
structuralHashCode → int: no setter
target ↔ Element?: getter/setter pair
toJSIterable → JSIterable<T>: Available on Iterable<T>, provided by the IterableToJSIterable extension
A JSIterable wrapper that proxies to the Dart iterable API.
no setter
wait → Future<List<T>>: Available on Iterable<Future<T>>, provided by the FutureIterable extension
Waits for futures in parallel.
no setter

Methods

addStyleChangeListener(StyleChangeListener listener) → void
any(bool test(dynamic element)) → bool: Checks whether any element of this iterable satisfies test.
inherited
asNameMap() → Map<String, T>: Available on Iterable<T>, provided by the EnumByName extension
Creates a map from the names of enum values to the values.
byName(String name) → T: Available on Iterable<T>, provided by the EnumByName extension
Finds the enum value in this list with name name.
cast<R>() → Iterable<R>: A view of this iterable as an iterable of R instances.
inherited
clearPseudoStyle(String type) → void
cloneEffective() → CSSStyleDeclaration
contains(Object? property) → bool: Check a css property is valid.
override
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
dispose() → Future<void>: override
elementAt(int index) → dynamic: Returns the indexth element.
inherited
elementAtOrNull(int index) → T?: Available on Iterable<T>, provided by the IterableExtensions extension
The element at position index of this iterable, or null.
every(bool test(dynamic element)) → bool: Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> toElements(dynamic element)) → Iterable<T>: Expands each element of this Iterable into zero or more elements.
inherited
firstWhere(bool test(dynamic element), {dynamic orElse()?}) → dynamic: The first element that satisfies the given predicate test.
inherited
flushDisplayProperties() → void
flushPendingProperties() → void
fold<T>(T initialValue, T combine(T previousValue, dynamic element)) → T: Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable other) → Iterable: Creates the lazy concatenation of this iterable and other.
inherited
forEach(void action(dynamic element)) → void: Invokes action on each element of this iterable in iteration order.
inherited
getPropertyBaseHref(String propertyName) → String?: Returns the baseHref associated with a property value if available.
getPropertyValue(String propertyName) → String: Returns the property value given a property name. value is a String containing the value of the property. If not set, returns the empty string.
getStaticDefinedAsyncMethod(String method) → StaticDefinedAsyncBindingObjectMethod?: inherited
getStaticDefinedProperty(String key) → StaticDefinedBindingProperty?: inherited
getStaticDefinedSyncMethod(String method) → StaticDefinedSyncBindingObjectMethod?: inherited
handlePseudoRules(Element parentElement, List<CSSStyleRule> rules) → void
initializeDynamicMethods(Map<String, BindingObjectMethod> methods) → void: inherited
initializeDynamicProperties(Map<String, BindingObjectProperty> properties) → void: inherited
initializeMethods(Map<String, BindingObjectMethod> methods) → void: inherited
initializeProperties(Map<String, BindingObjectProperty> properties) → void: inherited
isImportant(String propertyName) → bool: Whether the given property is marked as !important on this declaration.
item(int index) → String: Returns a property name.
join([String separator = ""]) → String: Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(dynamic element), {dynamic orElse()?}) → dynamic: The last element that satisfies the given predicate test.
inherited
map<T>(T toElement(dynamic e)) → Iterable<T>: The current elements of this iterable modified by toElement.
inherited
merge(CSSStyleDeclaration other) → bool
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
reduce(dynamic combine(dynamic value, dynamic element)) → dynamic: Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
removeProperty(String propertyName, [bool? isImportant]) → void: Removes a property from the CSS declaration.
removePseudoProperty(String type, String propertyName) → void
removeStyleChangeListener(StyleChangeListener listener) → void
reset() → void
setProperty(String propertyName, String? value, {bool? isImportant, String? baseHref, bool validate = true}) → void: Modifies an existing CSS property or creates a new CSS property in the declaration block.
setPseudoProperty(String type, String propertyName, String value, {String? baseHref, bool validate = true}) → void
singleWhere(bool test(dynamic element), {dynamic orElse()?}) → dynamic: The single element that satisfies test.
inherited
skip(int count) → Iterable: Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(dynamic element)) → Iterable: Creates an Iterable that skips leading elements while test is satisfied.
inherited
structurallyEquals(CSSStyleDeclaration other) → bool
take(int count) → Iterable: Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(dynamic element)) → Iterable: Creates a lazy iterable of the leading elements satisfying test.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toList({bool growable = true}) → List: Creates a List containing the elements of this Iterable.
inherited
toSet() → Set: Creates a Set containing the same elements as this iterable.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: Returns a string representation of (some of) the elements of this.
override
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A brief description of this object, usually just the runtimeType and the hashCode.
inherited
union(CSSStyleDeclaration declaration) → void
unionByImportance(CSSStyleDeclaration declaration, {required bool important}) → void: Like union, but only applies declarations matching important.
where(bool test(dynamic element)) → Iterable: Creates a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<R>: Creates a new lazy Iterable with all elements that have type T.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited
operator [](String property) → dynamic
operator []=(String property, dynamic value) → void

Static Properties

empty ↔ CSSStyleDeclaration: An empty style declaration.
getter/setter pair

Static Methods

isNullOrEmptyValue(dynamic value) → bool