JSArray<T extends JSAny?> extension type

A JavaScript Array.

Because JSArray is an extension type, T is only a static guarantee and the array does not necessarily only contain T elements. For example:

@JS()
external JSArray<JSNumber> get array;

array is not actually checked to ensure it contains instances of JSNumber when called.

T may introduce additional checking elsewhere, however. When accessing elements of JSArray with type T, there is a check to ensure the element is a T to ensure soundness. Similarly, when converting to a List<T>, casts may be introduced to ensure that it is indeed a List<T>.

on

JSArrayRepType

Implemented types

JSObject

Available extensions

Annotations

@JS('Array')

Constructors

JSArray(): Creates an empty JavaScript Array.
JSArray.withLength(int length): Creates a JavaScript Array of size length with no elements.

Properties

hashCode → int: The hash code for this object.
no setterinherited
length ↔ int: The length in elements of this Array.
getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
toDart → List<T>: Available on JSArray<T>, provided by the JSArrayToList extension
Converts this JSArray to a List by either casting or wrapping it.
no setter

Methods

callMethod<R extends JSAny?>(JSAny method, [JSAny? arg1, JSAny? arg2, JSAny? arg3, JSAny? arg4]) → R: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Calls method on this JSObject with up to four arguments.
callMethodVarArgs<R extends JSAny?>(JSAny method, [List<JSAny?>? arguments]) → R: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Calls method on this JSObject with a variable number of arguments.
delete(JSAny property) → JSBoolean: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Deletes the property with key property from this JSObject.
getProperty<R extends JSAny?>(JSAny property) → R: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
The value of the property key property of this JSObject.
has(String property) → bool: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Shorthand helper for hasProperty to check whether this JSObject contains the property key property, but takes and returns a Dart value.
hasProperty(JSAny property) → JSBoolean: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Whether or not this JSObject contains the property key property.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
setProperty(JSAny property, JSAny? value) → void: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Write the value of property key property of this JSObject.
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited
operator [](int position) → T: The value at position in this Array.
operator [](String property) → JSAny?: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Shorthand helper for getProperty to get the value of the property key property of this JSObject, but takes and returns a Dart value.
operator []=(int position, T value) → void: Sets the value at position in this Array.
operator []=(String property, JSAny? value) → void: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Shorthand helper for setProperty to write the value of the property key property of this JSObject, but takes a Dart value.

Static Methods

from<T extends JSAny>(JSObject arrayLike) → JSArray<T>: Creates a new, shallow-copied JavaScript Array instance from a JavaScript iterable or array-like object.