XMLHttpRequest extension type

XMLHttpRequest (XHR) objects are used to interact with servers. You can retrieve data from a URL without having to do a full page refresh. This enables a Web page to update just part of a page without disrupting what the user is doing.

Despite its name, XMLHttpRequest can be used to retrieve any type of data, not just XML.

If your communication needs to involve receiving event data or message data from a server, consider using server-sent events through the EventSource interface. For full-duplex communication, WebSockets may be a better choice.

@AvailableInWorkers("notservice")

on

JSObject

Implemented types

Available extensions

Constructors

XMLHttpRequest(): factory

Properties

hashCode → int: The hash code for this 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
not → JSBoolean: Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result of !this in JavaScript.
no setter
onabort ↔ EventHandler?: getter/setter pairinherited
onerror ↔ EventHandler?: getter/setter pairinherited
onError → Stream<ProgressEvent>: Available on XMLHttpRequest, provided by the XHRGetters extension

no setter
onload ↔ EventHandler?: getter/setter pairinherited
onLoad → Stream<ProgressEvent>: Available on XMLHttpRequest, provided by the XHRGetters extension

no setter
onloadend ↔ EventHandler?: getter/setter pairinherited
onloadstart ↔ EventHandler?: getter/setter pairinherited
onprogress ↔ EventHandler?: getter/setter pairinherited
onProgress → Stream<ProgressEvent>: Available on XMLHttpRequest, provided by the XHRGetters extension

no setter
onreadystatechange ↔ EventHandler?: getter/setter pair
onReadyStateChange → Stream<Event>: Available on XMLHttpRequest, provided by the XHRGetters extension

no setter
ontimeout ↔ EventHandler?: getter/setter pairinherited
readyState → int: no setter
response → JSAny?: no setter
responseText → String: no setter
responseType ↔ XMLHttpRequestResponseType: getter/setter pair
responseURL → String: no setter
responseXML → Document?: no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
status → int: no setter
statusText → String: no setter
timeout ↔ int: getter/setter pair
upload → XMLHttpRequestUpload: no setter
withCredentials ↔ bool: getter/setter pair

Methods

abort() → void: The XMLHttpRequest.abort() method aborts the request if it has already been sent. When a request is aborted, its XMLHttpRequest.readyState is changed to XMLHttpRequest.UNSENT (0) and the request's XMLHttpRequest.status code is set to 0.
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
and(JSAny? any) → JSAny?: Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result of this && any in JavaScript.
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.
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.
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.
getAllResponseHeaders() → String: The XMLHttpRequest method getAllResponseHeaders() returns all the response headers, separated by , as a string, or returns null if no response has been received.
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.
getResponseHeader(String name) → String?: The XMLHttpRequest method getResponseHeader() returns the string containing the text of a particular header's value.
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.
hasProperty(JSAny property) → JSBoolean: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Whether or not this JSObject contains the property key property.
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.
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.
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.
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.
open(String method, String url, [bool async, String? username, String? password]) → void: The XMLHttpRequest method open() initializes a newly-created request, or re-initializes an existing one.
or(JSAny? any) → JSAny?: Available on JSAny?, provided by the JSAnyOperatorExtension extension
The result of this || any in JavaScript.
overrideMimeType(String mime) → void: The XMLHttpRequest method overrideMimeType() specifies a MIME type other than the one provided by the server to be used instead when interpreting the data being transferred in a request.
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
send([JSAny? body]) → void: The XMLHttpRequest method send() sends the request to the server.
setProperty(JSAny property, JSAny? value) → void: Available on JSObject, provided by the JSObjectUnsafeUtilExtension extension
Write the value of property key property of this JSObject.
setRequestHeader(String name, String value) → void: The XMLHttpRequest method setRequestHeader() sets the value of an HTTP request header. When using setRequestHeader(), you must call it after calling XMLHttpRequest.open, but before calling XMLHttpRequest.send. If this method is called several times with the same header, the values are merged into one single request header.
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.
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.

Static Properties

DONE → int: no setter
HEADERS_RECEIVED → int: no setter
LOADING → int: no setter
OPENED → int: no setter
UNSENT → int: no setter