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.styleSheets
0.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
-
- Object
- Iterable
- BindingObject
- DynamicBindingObject
- CSSStyleDeclaration
- Implementers
- 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
- hashCode → int
-
The hash code for this object.
no setteroverride
- hasInheritedPendingProperty → bool
-
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
Iteratorthat allows iterating the elements of thisIterable.no setteroverride - last → dynamic
-
The last element.
no setterinherited
- length → int
-
The number of properties.
no setteroverride
- 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
- target ↔ Element?
-
getter/setter pair
Methods
-
addStyleChangeListener(
StyleChangeListener listener) → void -
any(
bool test(dynamic element)) → bool -
Checks whether any element of this iterable satisfies
test.inherited -
cast<
R> () → Iterable< R> -
A view of this iterable as an iterable of
Rinstances.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 -
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
actionon 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
countelements.inherited -
skipWhile(
bool test(dynamic value)) → Iterable -
Creates an
Iterablethat skips leading elements whiletestis satisfied.inherited -
take(
int count) → Iterable -
Creates a lazy iterable of the
countfirst 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