SVGAnimateTransformElement extension type

The SVGAnimateTransformElement interface corresponds to the element.

API documentation sourced from MDN Web Docs.

on
Implemented types
Available extensions

Constructors

SVGAnimateTransformElement()
Creates an SVGAnimateTransformElement using the tag 'animateTransform'.

Properties

ariaAtomic ↔ String?
The ariaAtomic property of the Element interface reflects the value of the aria-atomic attribute, which indicates whether assistive technologies will present all, or only parts of, the changed region based on the change notifications defined by the aria-relevant attribute.
getter/setter pairinherited
ariaAutoComplete ↔ String?
The ariaAutoComplete property of the Element interface reflects the value of the aria-autocomplete attribute, which indicates whether inputting text could trigger display of one or more predictions of the user's intended value for a combobox, searchbox, or textbox and specifies how predictions would be presented if they were made.
getter/setter pairinherited
ariaBrailleLabel ↔ String?
The ariaBrailleLabel property of the Element interface reflects the value of the aria-braillelabel attribute, which defines the ARIA braille label of the element.
getter/setter pairinherited
ariaBrailleRoleDescription ↔ String?
The ariaBrailleRoleDescription property of the Element interface reflects the value of the aria-brailleroledescription attribute, which defines the ARIA braille role description of the element.
getter/setter pairinherited
ariaBusy ↔ String?
The ariaBusy property of the Element interface reflects the value of the aria-busy attribute, which indicates whether an element is being modified, as assistive technologies may want to wait until the modifications are complete before exposing them to the user.
getter/setter pairinherited
ariaChecked ↔ String?
The ariaChecked property of the Element interface reflects the value of the aria-checked attribute, which indicates the current "checked" state of checkboxes, radio buttons, and other widgets that have a checked state.
getter/setter pairinherited
ariaColCount ↔ String?
The ariaColCount property of the Element interface reflects the value of the aria-colcount attribute, which defines the number of columns in a table, grid, or treegrid.
getter/setter pairinherited
ariaColIndex ↔ String?
The ariaColIndex property of the Element interface reflects the value of the aria-colindex attribute, which defines an element's column index or position with respect to the total number of columns within a table, grid, or treegrid.
getter/setter pairinherited
ariaColSpan ↔ String?
The ariaColSpan property of the Element interface reflects the value of the aria-colspan attribute, which defines the number of columns spanned by a cell or gridcell within a table, grid, or treegrid.
getter/setter pairinherited
ariaCurrent ↔ String?
The ariaCurrent property of the Element interface reflects the value of the aria-current attribute, which indicates the element that represents the current item within a container or set of related elements.
getter/setter pairinherited
ariaDescription ↔ String?
The ariaDescription property of the Element interface reflects the value of the aria-description attribute, which defines a string value that describes or annotates the current element.
getter/setter pairinherited
ariaDisabled ↔ String?
The ariaDisabled property of the Element interface reflects the value of the aria-disabled attribute, which indicates that the element is perceivable but disabled, so it is not editable or otherwise operable.
getter/setter pairinherited
ariaExpanded ↔ String?
The ariaExpanded property of the Element interface reflects the value of the aria-expanded attribute, which indicates whether a grouping element owned or controlled by this element is expanded or collapsed.
getter/setter pairinherited
ariaHasPopup ↔ String?
The ariaHasPopup property of the Element interface reflects the value of the aria-haspopup attribute, which indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.
getter/setter pairinherited
ariaHidden ↔ String?
The ariaHidden property of the Element interface reflects the value of the aria-hidden) attribute, which indicates whether the element is exposed to an accessibility API.
getter/setter pairinherited
ariaInvalid ↔ String?
getter/setter pairinherited
ariaKeyShortcuts ↔ String?
The ariaKeyShortcuts property of the Element interface reflects the value of the aria-keyshortcuts attribute, which indicates keyboard shortcuts that an author has implemented to activate or give focus to an element.
getter/setter pairinherited
ariaLabel ↔ String?
The ariaLabel property of the Element interface reflects the value of the aria-label attribute, which defines a string value that labels the current element.
getter/setter pairinherited
ariaLevel ↔ String?
The ariaLevel property of the Element interface reflects the value of the aria-level attribute, which defines the hierarchical level of an element within a structure.
getter/setter pairinherited
ariaLive ↔ String?
The ariaLive property of the Element interface reflects the value of the aria-live attribute, which indicates that an element will be updated, and describes the types of updates the user agents, assistive technologies, and user can expect from the live region.
getter/setter pairinherited
ariaModal ↔ String?
The ariaModal property of the Element interface reflects the value of the aria-modal attribute, which indicates whether an element is modal when displayed. Applying the aria-modal property to an element with role="dialog" replaces the technique of using aria-hidden on the background for informing assistive technologies that content outside a dialog is inert.
getter/setter pairinherited
ariaMultiLine ↔ String?
The ariaMultiLine property of the Element interface reflects the value of the aria-multiline attribute, which indicates whether a text box accepts multiple lines of input or only a single line.
getter/setter pairinherited
ariaMultiSelectable ↔ String?
The ariaMultiSelectable property of the Element interface reflects the value of the aria-multiselectable attribute, which indicates that the user may select more than one item from the current selectable descendants.
getter/setter pairinherited
ariaOrientation ↔ String?
The ariaOrientation property of the Element interface reflects the value of the aria-orientation attribute, which indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous.
getter/setter pairinherited
ariaPlaceholder ↔ String?
The ariaPlaceholder property of the Element interface reflects the value of the aria-placeholder attribute, which defines a short hint intended to aid the user with data entry when the control has no value.
getter/setter pairinherited
ariaPosInSet ↔ String?
The ariaPosInSet property of the Element interface reflects the value of the aria-posinset attribute, which defines an element's number or position in the current set of listitems or treeitems.
getter/setter pairinherited
ariaPressed ↔ String?
The ariaPressed property of the Element interface reflects the value of the aria-pressed attribute, which indicates the current "pressed" state of toggle buttons.
getter/setter pairinherited
ariaReadOnly ↔ String?
The ariaReadOnly property of the Element interface reflects the value of the aria-readonly attribute, which indicates that the element is not editable, but is otherwise operable.
getter/setter pairinherited
ariaRequired ↔ String?
The ariaRequired property of the Element interface reflects the value of the aria-required attribute, which indicates that user input is required on the element before a form may be submitted.
getter/setter pairinherited
ariaRoleDescription ↔ String?
The ariaRoleDescription property of the Element interface reflects the value of the aria-roledescription attribute, which defines a human-readable, author-localized description for the role of an element.
getter/setter pairinherited
ariaRowCount ↔ String?
The ariaRowCount property of the Element interface reflects the value of the aria-rowcount attribute, which defines the total number of rows in a table, grid, or treegrid.
getter/setter pairinherited
ariaRowIndex ↔ String?
The ariaRowIndex property of the Element interface reflects the value of the aria-rowindex attribute, which defines an element's row index or position with respect to the total number of rows within a table, grid, or treegrid.
getter/setter pairinherited
ariaRowSpan ↔ String?
The ariaRowSpan property of the Element interface reflects the value of the aria-rowspan attribute, which defines the number of rows spanned by a cell or gridcell within a table, grid, or treegrid.
getter/setter pairinherited
ariaSelected ↔ String?
The ariaSelected property of the Element interface reflects the value of the aria-selected attribute, which indicates the current "selected" state of elements that have a selected state.
getter/setter pairinherited
ariaSetSize ↔ String?
The ariaSetSize property of the Element interface reflects the value of the aria-setsize attribute, which defines the number of items in the current set of listitems or treeitems.
getter/setter pairinherited
ariaSort ↔ String?
The ariaSort property of the Element interface reflects the value of the aria-sort attribute, which indicates if items in a table or grid are sorted in ascending or descending order.
getter/setter pairinherited
ariaValueMax ↔ String?
The ariaValueMax property of the Element interface reflects the value of the aria-valuemax attribute, which defines the maximum allowed value for a range widget.
getter/setter pairinherited
ariaValueMin ↔ String?
The ariaValueMin property of the Element interface reflects the value of the aria-valuemin attribute, which defines the minimum allowed value for a range widget.
getter/setter pairinherited
ariaValueNow ↔ String?
The ariaValueNow property of the Element interface reflects the value of the aria-valuenow attribute, which defines the current value for a range widget.
getter/setter pairinherited
ariaValueText ↔ String?
The ariaValueText property of the Element interface reflects the value of the aria-valuetext attribute, which defines the human-readable text alternative of aria-valuenow for a range widget.
getter/setter pairinherited
assignedSlot → HTMLSlotElement?
The assignedSlot read-only property of the Element interface returns an HTMLSlotElement representing the slot element the node is inserted in.
no setterinherited
attributes → NamedNodeMap
The Element.attributes property returns a live collection of all attribute nodes registered to the specified node. It is a NamedNodeMap, not an Array, so it has no Array methods and the Attr nodes' indexes may differ among browsers. To be more specific, attributes is a key/value pair of strings that represents any information regarding that attribute.
no setterinherited
attributeStyleMap → StylePropertyMap
The attributeStyleMap read-only property of the SVGElement interface returns a live StylePropertyMap object that contains a list of style properties of the element that are defined in the element's inline style attribute, or assigned using the SVGElement.style property of the SVGElement interface via script.
no setterinherited
autofocus ↔ bool
getter/setter pairinherited
baseURI → String
The read-only baseURI property of the Node interface returns the absolute base URL of the document containing the node.
no setterinherited
childElementCount → int
The Element.childElementCount read-only property returns the number of child elements of this element.
no setterinherited
childNodes → NodeList
The read-only childNodes property of the Node interface returns a live NodeList of child Node of the given element where the first child node is assigned index 0. Child nodes include elements, text and comments.
no setterinherited
children → HTMLCollection
The read-only children property returns a live HTMLCollection which contains all of the child Element of the element upon which it was called.
no setterinherited
classList → DOMTokenList
The Element.classList is a read-only property that returns a live DOMTokenList collection of the class attributes of the element. This can then be used to manipulate the class list.
no setterinherited
className → SVGAnimatedString

Available on SVGElement, provided by the SVGElementExtension extension

no setter
className ↔ String
The className property of the Element interface gets and sets the value of the class attribute of the specified element.
getter/setter pairinherited
clientHeight → int
The Element.clientHeight read-only property is zero for elements with no CSS or inline layout boxes; otherwise, it's the inner height of an element in pixels. It includes padding but excludes borders, margins, and horizontal scrollbars (if present).
no setterinherited
clientLeft → int
The width of the left border of an element in pixels. It includes the width of the vertical scrollbar if the text direction of the element is right-to-left and if there is an overflow causing a left vertical scrollbar to be rendered. clientLeft does not include the left margin or the left padding. clientLeft is read-only.
no setterinherited
clientTop → int
The width of the top border of an element in pixels. It is a read-only, integer property of element.
no setterinherited
clientWidth → int
The Element.clientWidth property is zero for inline elements and elements with no CSS; otherwise, it's the inner width of an element in pixels. It includes padding but excludes borders, margins, and vertical scrollbars (if present).
no setterinherited
dataset → DOMStringMap
The dataset read-only property of the SVGElement interface provides read/write access to custom data attributes (data-*) on elements. It exposes a map of strings (DOMStringMap) with an entry for each data-* attribute.
no setterinherited
firstChild → Node?
The read-only firstChild property of the Node interface returns the node's first child in the tree, or null if the node has no children.
no setterinherited
firstElementChild → Element?
The Element.firstElementChild read-only property returns an element's first child Element, or null if there are no child elements.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
id ↔ String
The id property of the Element interface represents the element's identifier, reflecting the id global attribute.
getter/setter pairinherited
innerHTML ↔ JSAny
The Element property innerHTML gets or sets the HTML or XML markup contained within the element.
getter/setter pairinherited
isConnected → bool
The read-only isConnected property of the Node interface returns a boolean indicating whether the node is connected (directly or indirectly) to a Document object.
no setterinherited
isDefinedAndNotNull → bool

Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension

no setter
isNull → bool

Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension

Whether this value corresponds to JavaScript null.
no setter
isTruthy → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of !!this in JavaScript.
no setter
isUndefined → bool

Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension

Whether this value corresponds to JavaScript undefined.
no setter
isUndefinedOrNull → bool

Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension

no setter
lastChild → Node?
The read-only lastChild property of the Node interface returns the last child of the node, or null if there are no child nodes.
no setterinherited
lastElementChild → Element?
The Element.lastElementChild read-only property returns an element's last child Element, or null if there are no child elements.
no setterinherited
localName → String
The Element.localName read-only property returns the local part of the qualified name of an element.
no setterinherited
namespaceURI → String?
The Element.namespaceURI read-only property returns the namespace URI of the element, or null if the element is not in a namespace.
no setterinherited
nextElementSibling → Element?
The Element.nextElementSibling read-only property returns the element immediately following the specified one in its parent's children list, or null if the specified element is the last one in the list.
no setterinherited
nextSibling → Node?
The read-only nextSibling property of the Node interface returns the node immediately following the specified one in their parent's Node.childNodes, or returns null if the specified node is the last child in the parent element.
no setterinherited
nodeName → String
The read-only nodeName property of Node returns the name of the current node as a string.
no setterinherited
nodeType → int
The read-only nodeType property of a Node interface is an integer that identifies what the node is. It distinguishes different kind of nodes from each other, such as Element, Text and Comment.
no setterinherited
nodeValue ↔ String?
The nodeValue property of the Node interface returns or sets the value of the current node.
getter/setter pairinherited
nonce ↔ String
getter/setter pairinherited
not → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of !this in JavaScript.
no setter
onabort ↔ EventHandler?
getter/setter pairinherited
onAbort → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onanimationcancel ↔ EventHandler?
getter/setter pairinherited
onanimationend ↔ EventHandler?
getter/setter pairinherited
onanimationiteration ↔ EventHandler?
getter/setter pairinherited
onanimationstart ↔ EventHandler?
getter/setter pairinherited
onauxclick ↔ EventHandler?
getter/setter pairinherited
onBeforeCopy → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onBeforeCut → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onbeforeinput ↔ EventHandler?
getter/setter pairinherited
onBeforePaste → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onbeforetoggle ↔ EventHandler?
getter/setter pairinherited
onBlur → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onblur ↔ EventHandler?
getter/setter pairinherited
oncancel ↔ EventHandler?
getter/setter pairinherited
onCanPlay → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
oncanplay ↔ EventHandler?
getter/setter pairinherited
onCanPlayThrough → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
oncanplaythrough ↔ EventHandler?
getter/setter pairinherited
onChange → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onchange ↔ EventHandler?
getter/setter pairinherited
onclick ↔ EventHandler?
getter/setter pairinherited
onClick → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onclose ↔ EventHandler?
getter/setter pairinherited
oncontextlost ↔ EventHandler?
getter/setter pairinherited
onContextMenu → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
oncontextmenu ↔ EventHandler?
getter/setter pairinherited
oncontextrestored ↔ EventHandler?
getter/setter pairinherited
onCopy → ElementStream<ClipboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
oncopy ↔ EventHandler?
getter/setter pairinherited
oncuechange ↔ EventHandler?
getter/setter pairinherited
onCut → ElementStream<ClipboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
oncut ↔ EventHandler?
getter/setter pairinherited
ondblclick ↔ EventHandler?
getter/setter pairinherited
onDoubleClick → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
ondrag ↔ EventHandler?
getter/setter pairinherited
onDrag → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondragend ↔ EventHandler?
getter/setter pairinherited
onDragEnd → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondragenter ↔ EventHandler?
getter/setter pairinherited
onDragEnter → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondragleave ↔ EventHandler?
getter/setter pairinherited
onDragLeave → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondragover ↔ EventHandler?
getter/setter pairinherited
onDragOver → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondragstart ↔ EventHandler?
getter/setter pairinherited
onDragStart → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ondrop ↔ EventHandler?
getter/setter pairinherited
onDrop → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onDurationChange → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
ondurationchange ↔ EventHandler?
getter/setter pairinherited
onemptied ↔ EventHandler?
getter/setter pairinherited
onEmptied → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onend ↔ EventHandler?
getter/setter pairinherited
onEnded → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onended ↔ EventHandler?
getter/setter pairinherited
onError → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onerror ↔ OnErrorEventHandler?
getter/setter pairinherited
onFocus → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onfocus ↔ EventHandler?
getter/setter pairinherited
onformdata ↔ EventHandler?
getter/setter pairinherited
onFullscreenChange → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onfullscreenchange ↔ EventHandler?
getter/setter pairinherited
onFullscreenError → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onfullscreenerror ↔ EventHandler?
getter/setter pairinherited
ongotpointercapture ↔ EventHandler?
getter/setter pairinherited
onInput → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
oninput ↔ EventHandler?
getter/setter pairinherited
onInvalid → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
oninvalid ↔ EventHandler?
getter/setter pairinherited
onKeyDown → ElementStream<KeyboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onkeydown ↔ EventHandler?
getter/setter pairinherited
onkeypress ↔ EventHandler?
getter/setter pairinherited
onKeyPress → ElementStream<KeyboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onkeyup ↔ EventHandler?
getter/setter pairinherited
onKeyUp → ElementStream<KeyboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onload ↔ EventHandler?
getter/setter pairinherited
onLoad → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onloadeddata ↔ EventHandler?
getter/setter pairinherited
onLoadedData → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onLoadedMetadata → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onloadedmetadata ↔ EventHandler?
getter/setter pairinherited
onloadstart ↔ EventHandler?
getter/setter pairinherited
onlostpointercapture ↔ EventHandler?
getter/setter pairinherited
onmousedown ↔ EventHandler?
getter/setter pairinherited
onMouseDown → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmouseenter ↔ EventHandler?
getter/setter pairinherited
onMouseEnter → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmouseleave ↔ EventHandler?
getter/setter pairinherited
onMouseLeave → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmousemove ↔ EventHandler?
getter/setter pairinherited
onMouseMove → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmouseout ↔ EventHandler?
getter/setter pairinherited
onMouseOut → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmouseover ↔ EventHandler?
getter/setter pairinherited
onMouseOver → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onmouseup ↔ EventHandler?
getter/setter pairinherited
onMouseUp → ElementStream<MouseEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onMouseWheel → ElementStream<WheelEvent>

Available on Element, provided by the ElementCustomEvents extension

no setter
onpaste ↔ EventHandler?
getter/setter pairinherited
onPaste → ElementStream<ClipboardEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onpause ↔ EventHandler?
getter/setter pairinherited
onPause → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onPlay → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onplay ↔ EventHandler?
getter/setter pairinherited
onplaying ↔ EventHandler?
getter/setter pairinherited
onPlaying → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onpointercancel ↔ EventHandler?
getter/setter pairinherited
onpointerdown ↔ EventHandler?
getter/setter pairinherited
onpointerenter ↔ EventHandler?
getter/setter pairinherited
onpointerleave ↔ EventHandler?
getter/setter pairinherited
onpointermove ↔ EventHandler?
getter/setter pairinherited
onpointerout ↔ EventHandler?
getter/setter pairinherited
onpointerover ↔ EventHandler?
getter/setter pairinherited
onpointerup ↔ EventHandler?
getter/setter pairinherited
onprogress ↔ EventHandler?
getter/setter pairinherited
onRateChange → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onratechange ↔ EventHandler?
getter/setter pairinherited
onReset → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onreset ↔ EventHandler?
getter/setter pairinherited
onResize → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onresize ↔ EventHandler?
getter/setter pairinherited
onscroll ↔ EventHandler?
getter/setter pairinherited
onScroll → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onscrollend ↔ EventHandler?
getter/setter pairinherited
onSearch → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onsecuritypolicyviolation ↔ EventHandler?
getter/setter pairinherited
onSeeked → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onseeked ↔ EventHandler?
getter/setter pairinherited
onseeking ↔ EventHandler?
getter/setter pairinherited
onSeeking → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onSelect → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onselect ↔ EventHandler?
getter/setter pairinherited
onselectionchange ↔ EventHandler?
getter/setter pairinherited
onSelectStart → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onselectstart ↔ EventHandler?
getter/setter pairinherited
onslotchange ↔ EventHandler?
getter/setter pairinherited
onStalled → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onstalled ↔ EventHandler?
getter/setter pairinherited
onsubmit ↔ EventHandler?
getter/setter pairinherited
onSubmit → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onSuspend → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onsuspend ↔ EventHandler?
getter/setter pairinherited
onTimeUpdate → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
ontimeupdate ↔ EventHandler?
getter/setter pairinherited
ontoggle ↔ EventHandler?
getter/setter pairinherited
ontouchcancel ↔ EventHandler?
getter/setter pairinherited
onTouchCancel → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ontouchend ↔ EventHandler?
getter/setter pairinherited
onTouchEnd → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onTouchEnter → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onTouchLeave → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onTouchMove → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ontouchmove ↔ EventHandler?
getter/setter pairinherited
onTouchStart → ElementStream<TouchEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
ontouchstart ↔ EventHandler?
getter/setter pairinherited
ontransitioncancel ↔ EventHandler?
getter/setter pairinherited
ontransitionend ↔ EventHandler?
getter/setter pairinherited
onTransitionEnd → ElementStream<TransitionEvent>

Available on Element, provided by the ElementCustomEvents extension

no setter
ontransitionrun ↔ EventHandler?
getter/setter pairinherited
ontransitionstart ↔ EventHandler?
getter/setter pairinherited
onUnload → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onVolumeChange → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onvolumechange ↔ EventHandler?
getter/setter pairinherited
onwaiting ↔ EventHandler?
getter/setter pairinherited
onWaiting → ElementStream<Event>

Available on Element, provided by the ElementEventGetters extension

no setter
onWebGlContextLost → ElementStream<WebGLContextEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onWebGlContextRestored → ElementStream<WebGLContextEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
onwheel ↔ EventHandler?
getter/setter pairinherited
onWheel → ElementStream<WheelEvent>

Available on Element, provided by the ElementEventGetters extension

no setter
outerHTML ↔ JSAny
The outerHTML attribute of the Element DOM interface gets the serialized HTML fragment describing the element including its descendants. It can also be set to replace the element with nodes parsed from the given string.
getter/setter pairinherited
ownerDocument → Document?
The read-only ownerDocument property of the Node interface returns the top-level document object of the node.
no setterinherited
ownerSVGElement → SVGSVGElement?
no setterinherited
parentElement → Element?
The read-only parentElement property of Node interface returns the DOM node's parent Element, or null if the node either has no parent, or its parent isn't a DOM Element.
no setterinherited
parentNode → Node?
The read-only parentNode property of the Node interface returns the parent of the specified node in the DOM tree.
no setterinherited
part → DOMTokenList
The part property of the Element interface represents the part identifier(s) of the element (i.e. set using the part attribute), returned as a DOMTokenList. These can be used to style parts of a shadow DOM, via the pseudo-element.
no setterinherited
prefix → String?
The Element.prefix read-only property returns the namespace prefix of the specified element, or null if no prefix is specified.
no setterinherited
previousElementSibling → Element?
The Element.previousElementSibling read-only property returns the Element immediately prior to the specified one in its parent's children list, or null if the specified element is the first one in the list.
no setterinherited
previousSibling → Node?
The read-only previousSibling property of the Node interface returns the node immediately preceding the specified one in its parent's Node.childNodes list, or null if the specified node is the first in that list.
no setterinherited
requiredExtensions → SVGStringList
no setterinherited
role ↔ String?
getter/setter pairinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollHeight → int
The Element.scrollHeight read-only property is a measurement of the height of an element's content, including content not visible on the screen due to overflow.
no setterinherited
scrollLeft ↔ double
The Element.scrollLeft property gets or sets the number of pixels by which an element's content is scrolled from its left edge. This value is subpixel precise in modern browsers, meaning that it isn't necessarily a whole number.
getter/setter pairinherited
scrollTop ↔ double
The Element.scrollTop property gets or sets the number of pixels by which an element's content is scrolled from its top edge. This value is subpixel precise in modern browsers, meaning that it isn't necessarily a whole number.
getter/setter pairinherited
scrollWidth → int
The Element.scrollWidth read-only property is a measurement of the width of an element's content, including content not visible on the screen due to overflow.
no setterinherited
shadowRoot → ShadowRoot?
The Element.shadowRoot read-only property represents the shadow root hosted by the element.
no setterinherited
slot ↔ String
The slot property of the Element interface returns the name of the shadow DOM slot the element is inserted in.
getter/setter pairinherited
style → CSSStyleDeclaration
The read-only style property of the SVGElement returns the inline style of an element in the form of a live CSSStyleDeclaration object that contains a list of all styles properties for that element with values assigned only for the attributes that are defined in the element's inline style attribute.
no setterinherited
systemLanguage → SVGStringList
no setterinherited
tabIndex ↔ int
getter/setter pairinherited
tagName → String
The tagName read-only property of the Element interface returns the tag name of the element on which it's called.
no setterinherited
targetElement → SVGElement?
The SVGAnimationElement.targetElement property refers to the element which is being animated. If no target element is being animated (for example, because the href attribute specifies an unknown element), the value returned is null.
no setterinherited
text ← String

Available on Node, provided by the NodeGlue extension

no getter
textContent ↔ String?
The textContent property of the Node interface represents the text content of the node and its descendants.
getter/setter pairinherited
viewportElement → SVGElement?
no setterinherited

Methods

add(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this + any in JavaScript.
addEventListener(String type, EventListener? callback, [JSAny options]) → void
The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.
inherited
after(JSAny nodes) → void
The Element.after() method inserts a set of Node or string objects in the children list of the Element's parent, just after the Element. String objects are inserted as equivalent Text nodes.
inherited
and(JSAny? any) → JSAny?

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this && any in JavaScript.
animate(JSObject? keyframes, [JSAny options]) → Animation
The Element interface's animate() method is a shortcut method which creates a new Animation, applies it to the element, then plays the animation. It returns the created Animation object instance.
inherited
append(JSAny nodes) → void
The Element.append() method inserts a set of Node objects or string objects after the last child of the Element. String objects are inserted as equivalent Text nodes.
inherited
append(Node other) → Node

Available on Node, provided by the NodeGlue extension

appendChild(Node node) → Node
The appendChild() method of the Node interface adds a node to the end of the list of children of a specified parent node.
inherited
attachShadow(ShadowRootInit init) → ShadowRoot
The Element.attachShadow() method attaches a shadow DOM tree to the specified element and returns a reference to its ShadowRoot.
inherited
before(JSAny nodes) → void
The Element.before() method inserts a set of Node or string objects in the children list of this Element's parent, just before this Element. String objects are inserted as equivalent Text nodes.
inherited
beginElement() → void
inherited
beginElementAt(num offset) → void
inherited
blur() → void
inherited
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.
checkVisibility([CheckVisibilityOptions options]) → bool
The checkVisibility() method of the Element interface checks whether the element is visible.
inherited
clone(bool? deep) → Node

Available on Node, provided by the NodeGlue extension

cloneNode([bool deep]) → Node
The cloneNode() method of the Node interface returns a duplicate of the node on which this method was called. Its parameter controls if the subtree contained in a node is also cloned or not.
inherited
closest(String selectors) → Element?
The closest() method of the Element interface traverses the element and its parents (heading toward the document root) until it finds a node that matches the specified CSS selector.
inherited
compareDocumentPosition(Node other) → int
The compareDocumentPosition() method of the Node interface reports the position of its argument node relative to the node on which it is called.
inherited
computedStyleMap() → StylePropertyMapReadOnly
The computedStyleMap() method of the Element interface returns a StylePropertyMapReadOnly interface which provides a read-only representation of a CSS declaration block that is an alternative to CSSStyleDeclaration.
inherited
contains(Node? other) → bool
The contains() method of the Node interface returns a boolean value indicating whether a node is a descendant of a given node, that is the node itself, one of its direct children (Node.childNodes), one of the children's direct children, and so on.
inherited
dartify() → Object?

Available on JSAny?, provided by the JSAnyUtilityExtension extension

Converts a JavaScript value to the Dart equivalent if possible.
delete(JSAny property) → JSBoolean

Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension

Deletes the property with key property from this JSObject.
dispatchEvent(Event event) → bool
The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order. The normal event processing rules (including the capturing and optional bubbling phase) also apply to events dispatched manually with dispatchEvent().
inherited
divide(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this / any in JavaScript.
endElement() → void
inherited
endElementAt(num offset) → void
inherited
equals(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this == any in JavaScript.
exponentiate(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this ** any in JavaScript.
focus([FocusOptions options]) → void
inherited
getAnimations([GetAnimationsOptions options]) → JSArray<Animation>
The getAnimations() method of the Element interface (specified on the Animatable mixin) returns an array of all Animation objects affecting this element or which are scheduled to do so in future. It can optionally return Animation objects for descendant elements too.
inherited
getAttribute(String qualifiedName) → String?
The getAttribute() method of the Element interface returns the value of a specified attribute on the element.
inherited
getAttributeNames() → JSArray<JSString>
The getAttributeNames() method of the Element interface returns the attribute names of the element as an Array of strings. If the element has no attributes it returns an empty array.
inherited
getAttributeNode(String qualifiedName) → Attr?
Returns the specified attribute of the specified element, as an Attr node.
inherited
getAttributeNodeNS(String? namespace, String localName) → Attr?
The getAttributeNodeNS() method of the Element interface returns the namespaced Attr node of an element.
inherited
getAttributeNS(String? namespace, String localName) → String?
The getAttributeNS() method of the Element interface returns the string value of the attribute with the specified namespace and name. If the named attribute does not exist, the value returned will either be null or "" (the empty string); see Notes for details.
inherited
getBoundingClientRect() → DOMRect
The Element.getBoundingClientRect() method returns a DOMRect object providing information about the size of an element and its position relative to the viewport.
inherited
getClientRects() → DOMRectList
The getClientRects() method of the Element interface returns a collection of DOMRect objects that indicate the bounding rectangles for each CSS border box in a client.
inherited
getCurrentTime() → double
inherited
getElementsByClassName(String classNames) → HTMLCollection
The Element method getElementsByClassName() returns a live HTMLCollection which contains every descendant element which has the specified class name or names.
inherited
getElementsByTagName(String qualifiedName) → HTMLCollection
The Element.getElementsByTagName() method returns a live HTMLCollection of elements with the given tag name.
inherited
getElementsByTagNameNS(String? namespace, String localName) → HTMLCollection
The Element.getElementsByTagNameNS() method returns a live HTMLCollection of elements with the given tag name belonging to the given namespace. It is similar to Document.getElementsByTagNameNS, except that its search is restricted to descendants of the specified element.
inherited
getHTML([GetHTMLOptions options]) → String
The getHTML() method of the Element interface is used to serialize an element's DOM to an HTML string.
inherited
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.
getRootNode([GetRootNodeOptions options]) → Node
The getRootNode() method of the Node interface returns the context object's root, which optionally includes the shadow root if it is available.
inherited
getSimpleDuration() → double
inherited
getStartTime() → double
inherited
greaterThan(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this > any in JavaScript.
greaterThanOrEqualTo(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this >= any in JavaScript.
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.
hasAttribute(String qualifiedName) → bool
The Element.hasAttribute() method returns a Boolean value indicating whether the specified element has the specified attribute or not.
inherited
hasAttributeNS(String? namespace, String localName) → bool
The hasAttributeNS() method of the Element interface returns a boolean value indicating whether the current element has the specified attribute with the specified namespace.
inherited
hasAttributes() → bool
The hasAttributes() method of the Element interface returns a boolean value indicating whether the current element has any attributes or not.
inherited
hasChildNodes() → bool
The hasChildNodes() method of the Node interface returns a boolean value indicating whether the given Node has child nodes or not.
inherited
hasPointerCapture(int pointerId) → bool
The hasPointerCapture() method of the Element interface checks whether the element on which it is invoked has pointer capture for the pointer identified by the given pointer ID.
inherited
hasProperty(JSAny property) → JSBoolean

Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension

Whether or not this JSObject contains the property key property.
insertAdjacentElement(String where, Element element) → Element?
The insertAdjacentElement() method of the Element interface inserts a given element node at a given position relative to the element it is invoked upon.
inherited
insertAdjacentHTML(String position, JSAny string) → void
The insertAdjacentHTML() method of the Element interface parses the specified text as HTML or XML and inserts the resulting nodes into the DOM tree at a specified position.
inherited
insertAdjacentText(String where, String data) → void
The insertAdjacentText() method of the Element interface, given a relative position and a string, inserts a new text node at the given position relative to the element it is called from.
inherited
insertBefore(Node node, Node? child) → Node
The insertBefore() method of the Node interface inserts a node before a reference node as a child of a specified parent node.
inherited
instanceof(JSFunction constructor) → bool

Available on JSAny?, provided by the JSAnyUtilityExtension extension

Whether this JSAny? is an instanceof constructor.
instanceOfString(String constructorName) → bool

Available on JSAny?, provided by the JSAnyUtilityExtension extension

Whether this JSAny? is an instanceof the constructor that is defined by constructorName, which is looked up in the globalContext.
isA<T extends JSAny?>() → bool

Available on JSAny?, provided by the JSAnyUtilityExtension extension

Whether this JSAny? is an instance of the JavaScript type that is declared by T.
isDefaultNamespace(String? namespace) → bool
The isDefaultNamespace() method of the Node interface accepts a namespace URI as an argument. It returns a boolean value that is true if the namespace is the default namespace on the given node and false if not.
inherited
isEqualNode(Node? otherNode) → bool
The isEqualNode() method of the Node interface tests whether two nodes are equal. Two nodes are equal when they have the same type, defining characteristics (for elements, this would be their ID, number of children, and so forth), its attributes match, and so on. The specific set of data points that must match varies depending on the types of the nodes.
inherited
isSameNode(Node? otherNode) → bool
The isSameNode() method of the Node interface is a legacy alias the for the === strict equality operator. That is, it tests whether two nodes are the same (in other words, whether they reference the same object).
inherited
lessThan(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this < any in JavaScript.
lessThanOrEqualTo(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this <= any in JavaScript.
lookupNamespaceURI(String? prefix) → String?
The lookupNamespaceURI() method of the Node interface takes a prefix as parameter and returns the namespace URI associated with it on the given node if found (and null if not).
inherited
lookupPrefix(String? namespace) → String?
The lookupPrefix() method of the Node interface returns a string containing the prefix for a given namespace URI, if present, and null if not. When multiple prefixes are possible, the first prefix is returned.
inherited
matches(String selectors) → bool
The matches() method of the Element interface tests whether the element would be selected by the specified CSS selector.
inherited
modulo(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this % any in JavaScript.
multiply(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this * any in JavaScript.
normalize() → void
The normalize() method of the Node interface puts the specified node and all of its sub-tree into a normalized form. In a normalized sub-tree, no text nodes in the sub-tree are empty and there are no adjacent text nodes.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notEquals(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this != any in JavaScript.
or(JSAny? any) → JSAny?

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this || any in JavaScript.
prepend(JSAny nodes) → void
The Element.prepend() method inserts a set of Node objects or string objects before the first child of the Element. String objects are inserted as equivalent Text nodes.
inherited
querySelector(String selectors) → Element?
The querySelector() method of the Element interface returns the first element that is a descendant of the element on which it is invoked that matches the specified group of selectors.
inherited
querySelectorAll(String selectors) → NodeList
The Element method querySelectorAll() returns a static (not live) NodeList representing a list of elements matching the specified group of selectors which are descendants of the element on which the method was called.
inherited
releasePointerCapture(int pointerId) → void
The releasePointerCapture() method of the Element interface releases (stops) pointer capture that was previously set for a specific (PointerEvent) pointer.
inherited
remove() → void
The Element.remove() method removes the element from the DOM.
inherited
removeAttribute(String qualifiedName) → void
The Element method removeAttribute() removes the attribute with the specified name from the element.
inherited
removeAttributeNode(Attr attr) → Attr
The removeAttributeNode() method of the Element interface removes the specified Attr node from the element.
inherited
removeAttributeNS(String? namespace, String localName) → void
The removeAttributeNS() method of the Element interface removes the specified attribute with the specified namespace from an element.
inherited
removeChild(Node child) → Node
The removeChild() method of the Node interface removes a child node from the DOM and returns the removed node.
inherited
removeEventListener(String type, EventListener? callback, [JSAny options]) → void
The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.
inherited
replaceChild(Node node, Node child) → Node
The replaceChild() method of the Node interface replaces a child node within the given (parent) node.
inherited
replaceChildren(JSAny nodes) → void
The Element.replaceChildren() method replaces the existing children of a Node with a specified new set of children. These can be string or Node objects.
inherited
replaceWith(JSAny nodes) → void
The Element.replaceWith() method replaces this Element in the children list of its parent with a set of Node or string objects. String objects are inserted as equivalent Text nodes.
inherited
requestFullscreen([FullscreenOptions options]) → JSPromise<JSAny?>
The Element.requestFullscreen() method issues an asynchronous request to make the element be displayed in fullscreen mode.
inherited
requestPointerLock([PointerLockOptions options]) → JSPromise<JSAny?>
The requestPointerLock() method of the Element interface lets you asynchronously ask for the pointer to be locked on the given element.
inherited
scroll([JSAny optionsOrX, num y]) → void
The scroll() method of the Element interface scrolls the element to a particular set of coordinates inside a given element.
inherited
scrollBy([JSAny optionsOrX, num y]) → void
The scrollBy() method of the Element interface scrolls an element by the given amount.
inherited
scrollIntoView([JSAny arg]) → void
The Element interface's scrollIntoView() method scrolls the element's ancestor containers such that the element on which scrollIntoView() is called is visible to the user.
inherited
scrollTo([JSAny optionsOrX, num y]) → void
The scrollTo() method of the Element interface scrolls to a particular set of coordinates inside a given element.
inherited
setAttribute(String qualifiedName, String value) → void
The setAttribute() method of the Element interface sets the value of an attribute on the specified element. If the attribute already exists, the value is updated; otherwise a new attribute is added with the specified name and value.
inherited
setAttributeNode(Attr attr) → Attr?
The setAttributeNode() method of the Element interface adds a new Attr node to the specified element.
inherited
setAttributeNodeNS(Attr attr) → Attr?
The setAttributeNodeNS() method of the Element interface adds a new namespaced Attr node to an element.
inherited
setAttributeNS(String? namespace, String qualifiedName, String value) → void
setAttributeNS adds a new attribute or changes the value of an attribute with the given namespace and name.
inherited
setHTMLUnsafe(JSAny html) → void
The setHTMLUnsafe() method of the Element interface is used to parse a string of HTML into a DocumentFragment, which then replaces the element's subtree in the DOM. The input HTML may include declarative shadow roots.
inherited
setPointerCapture(int pointerId) → void
The setPointerCapture() method of the Element interface is used to designate a specific element as the capture target of future pointer events. Subsequent events for the pointer will be targeted at the capture element until capture is released (via Element.releasePointerCapture or the Element.pointerup_event event is fired).
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.
strictEquals(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this === any in JavaScript.
strictNotEquals(JSAny? any) → JSBoolean

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this !== any in JavaScript.
subtract(JSAny? any) → JSAny

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this - any in JavaScript.
toggleAttribute(String qualifiedName, [bool force]) → bool
The toggleAttribute() method of the Element interface toggles a Boolean attribute (removing it if it is present and adding it if it is not present) on the given element.
inherited
toString() → String
A string representation of this object.
inherited
typeofEquals(String typeString) → bool

Available on JSAny?, provided by the JSAnyUtilityExtension extension

Whether the result of typeof on this JSAny? is typeString.
unsignedRightShift(JSAny? any) → JSNumber

Available on JSAny?, provided by the JSAnyOperatorExtension extension

The result of this >>> any in JavaScript.

Operators

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