DataTransfer extension type
The DataTransfer object is used to hold the data that is being dragged
during a drag and drop operation. It may hold one or more data items, each
of one or more data types. For more information about drag and drop, see
HTML Drag and Drop API.
This object is available from the DragEvent.dataTransfer property of all DragEvent.
API documentation sourced from MDN Web Docs.
- on
- Implemented types
- Available extensions
Constructors
- DataTransfer()
-
factory
Properties
- asString → String
-
Available on JSAny, provided by the JSAnyExtension extension
no setter - asString → String?
-
Available on JSAny?, provided by the JSAnyNullableExtension extension
no setter - dropEffect ↔ String
-
The
DataTransfer.dropEffectproperty controls the feedback (typically visual) the user is given during a drag and drop operation. It will affect which cursor is displayed while dragging. For example, when the user hovers over a target drop element, the browser's cursor may indicate which type of operation will occur.getter/setter pair - effectAllowed ↔ String
-
The
DataTransfer.effectAllowedproperty specifies the effect that is allowed for a drag operation. The copy operation is used to indicate that the data being dragged will be copied from its present location to the drop location. The move operation is used to indicate that the data being dragged will be moved, and the link operation is used to indicate that some form of relationship or connection will be created between the source and drop locations.getter/setter pair -
entries
→ Iterable<
MapEntry< String, dynamic> > -
Available on JSObject, provided by the JSObjectExtension extension
no setter - files → FileList
-
The
filesread-only property ofDataTransferobjects is a FileList in the drag operation. If the operation includes no files, the list is empty.no setter - hashCode → int
-
The hash code for this object.
no setterinherited
- isDefinedAndNotNull → bool
-
Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension
no setter - isElement → bool
-
Available on JSObject?, provided by the JSObjectWebExtension extension
no setter - isHTMLElement → bool
-
Available on JSObject?, provided by the JSObjectWebExtension extension
no setter - isNode → bool
-
Available on JSObject?, provided by the JSObjectWebExtension extension
no setter - isNull → bool
-
Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension
Whether this value corresponds to JavaScriptnull.no setter - isTruthy → JSBoolean
-
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result of!!in JavaScript.thisno setter - isUndefined → bool
-
Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension
Whether this value corresponds to JavaScriptundefined.no setter - isUndefinedOrNull → bool
-
Available on JSAny?, provided by the NullableUndefineableJSAnyExtension extension
no setter - items → DataTransferItemList
-
The read-only
itemsproperty of the DataTransfer interface is a DataTransferItemList of the DataTransferItem in a drag operation. The list includes one item for each item in the operation and if the operation had no items, the list is empty.no setter -
keys
→ Iterable<
String> -
Available on JSObject, provided by the JSObjectExtension extension
no setter - not → JSBoolean
-
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result of!in JavaScript.thisno setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
types
→ JSArray<
JSString> -
The
DataTransfer.typesread-only property returns the available types that exist in the DataTransfer.items.no setter
Methods
-
add(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this+any -
and(
JSAny? any) → JSAny? -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this&&any -
as<
T extends JSObject> () → T? -
Available on JSObject, provided by the JSObjectExtension extension
-
callMethod<
R extends JSAny?> (JSAny method, [JSAny? arg1, JSAny? arg2, JSAny? arg3, JSAny? arg4]) → R -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Callsmethodon 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
Callsmethodon this JSObject with a variable number ofarguments. -
clearData(
[String format]) → void -
The
DataTransfer.clearData()method removes the drag operation's DataTransfer for the given type. If data for the given type does not exist, this method does nothing. -
dartify(
) → Object? -
Available on JSAny?, provided by the JSAnyUtilityExtension extension
Converts a JavaScript JSON-like value to the Dart equivalent if possible. -
delete(
JSAny property) → JSBoolean -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Deletes the property with keypropertyfrom this JSObject. -
divide(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this/any -
equals(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this==any -
exponentiate(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this**any -
get(
String key) → Object? -
Available on JSObject, provided by the JSObjectExtension extension
-
getData(
String format) → String -
The
DataTransfer.getData()method retrieves drag data (as a string) for the specified type. If the drag operation does not include data, this method returns an empty string. -
getProperty<
R extends JSAny?> (JSAny property) → R -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
The value of the property keypropertyof this JSObject. -
greaterThan(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this>any -
greaterThanOrEqualTo(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this>=any -
has(
String property) → bool -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Shorthand helper for hasProperty to check whether this JSObject contains the property keyproperty, 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 keyproperty. -
instanceof(
JSFunction constructor) → bool -
Available on JSAny?, provided by the JSAnyUtilityExtension extension
Whether thisJSAny?is aninstanceofconstructor. -
instanceOfString(
String constructorName) → bool -
Available on JSAny?, provided by the JSAnyUtilityExtension extension
Whether thisJSAny?is aninstanceofthe constructor that is defined byconstructorName, which is looked up in the globalContext. -
isA<
T extends JSAny?> () → bool -
Available on JSAny?, provided by the JSAnyUtilityExtension extension
Whether thisJSAny?is an instance of the JavaScript type that is declared byT. -
lessThan(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this<any -
lessThanOrEqualTo(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this<=any -
modulo(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this%any -
multiply(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this*any -
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 ofin JavaScript.this!=any -
or(
JSAny? any) → JSAny? -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this||any -
put(
Object key, Object? value) → void -
Available on JSObject, provided by the JSObjectExtension extension
-
setData(
String format, String data) → void -
The
DataTransfer.setData()method sets the drag operation's DataTransfer to the specified data and type. If data for the given type does not exist, it is added at the end of the drag data store, such that the last item in the DataTransfer.types list will be the new type. If data for the given type already exists, the existing data is replaced in the same position. That is, the order of the DataTransfer.types list is not changed when replacing data of the same type. -
setDragImage(
Element image, int x, int y) → void -
When a drag occurs, a translucent image is generated from the drag target
(the element
the
HTMLElement.dragstart_eventevent is fired at), and follows the mouse pointer during the drag. This image is created automatically, so you do not need to create it yourself. However, if a custom image is desired, theDataTransfer.setDragImage()method can be used to set the custom image to be used. The image will typically be animgelement but it can also be acanvasor any other visible element. -
setProperty(
JSAny property, JSAny? value) → void -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Write thevalueof property keypropertyof this JSObject. -
strictEquals(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this===any -
strictNotEquals(
JSAny? any) → JSBoolean -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this!==any -
subtract(
JSAny? any) → JSAny -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this-any -
toMap(
) → Map< String, dynamic> -
Available on JSObject, provided by the JSObjectExtension extension
-
toString(
) → String -
A string representation of this object.
inherited
-
typeofEquals(
String typeString) → bool -
Available on JSAny?, provided by the JSAnyUtilityExtension extension
Whether the result oftypeofon thisJSAny?istypeString. -
unsignedRightShift(
JSAny? any) → JSNumber -
Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result ofin JavaScript.this>>>any
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 keypropertyof this JSObject, but takes a Dart value. -
operator []=(
String property, JSAny? value) → void -
Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Shorthand helper for setProperty to write thevalueof the property keypropertyof this JSObject, but takes a Dart value.