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

Implementers

ComputedCSSStyleDeclaration

Available extensions

Constructors

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

Properties

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
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 setteroverride
hasInheritedPendingProperty → 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
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
pseudoAfterStyle ↔ CSSStyleDeclaration?: getter/setter pair
pseudoBeforeStyle ↔ CSSStyleDeclaration?: getter/setter pair
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
target ↔ Element?: getter/setter pair
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
contains(Object? property) → bool: Check a css property is valid.
override
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
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
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.
handlePseudoRules(Element parentElement, List<CSSStyleRule> rules) → void
initializeMethods(Map<String, BindingObjectMethod> methods) → void: override
initializeProperties(Map<String, BindingObjectProperty> properties) → void: override
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
nativeGetPropertiesAndMethods(Pointer<NativeValue> data) → void: inherited
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.
removeStyleChangeListener(StyleChangeListener listener) → void
reset() → void
setProperty(String propertyName, String? value, {bool? isImportant, String? baseHref}) → void: Modifies an existing CSS property or creates a new CSS property in the declaration block.
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 value)) → Iterable: Creates an Iterable that skips leading elements while test is satisfied.
inherited
take(int count) → Iterable: Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(dynamic value)) → Iterable: Creates a lazy iterable of the leading elements satisfying test.
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() → String: Returns a string representation of (some of) the elements of this.
override
union(CSSStyleDeclaration declaration) → void
where(bool test(dynamic element)) → Iterable: Creates a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<T>: Creates a new lazy Iterable with all elements that have type T.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
override
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