IDBRequest class
The interface of the IndexedDB API provides access to results of
asynchronous requests to databases and database objects using
event handler attributes. Each reading and writing operation on a
database is done using a request.
The request object does not initially contain any information
about the result of the operation, but once information becomes
available, an event is fired on the request, and the information
becomes available through the properties of the instance.
All asynchronous operations immediately return an instance. Each
request has a readyState that is set to the 'pending' state;
this changes to 'done' when the request is completed or fails.
When the state is set to done, every request returns a result
and an error, and an event is fired on the request. When the
state is still pending, any attempt to access the result or
error raises an InvalidStateError exception.
In plain words, all asynchronous methods return a request
object. If the request has been completed successfully, the
result is made available through the result property and an
event indicating success is fired at the request
(IDBRequest.onsuccess). If an error occurs while performing the
operation, the exception is made available through the result
property and an error event is fired (IDBRequest.onerror).
The interface IDBOpenDBRequest is derived from .
Note: This feature is available in Web Workers
EventTarget
IDBRequest
- Implemented types
- Implementers
- Available extensions
- Annotations
-
- @JS()
- @staticInterop
Constructors
- IDBRequest()
-
factory
Properties
- error → Exception?
-
Available on IDBRequest, provided by the PropsIDBRequest extension
no setter - hashCode → int
-
The hash code for this object.
no setterinherited
-
onerror
↔ EventHandlerNonNull<
Event> ? -
Available on IDBRequest, provided by the PropsIDBRequest extension
getter/setter pair -
onsuccess
↔ EventHandlerNonNull<
Event> ? -
Available on IDBRequest, provided by the PropsIDBRequest extension
getter/setter pair - readyState → IDBRequestReadyState
-
Available on IDBRequest, provided by the PropsIDBRequest extension
no setter - result → dynamic
-
Available on IDBRequest, provided by the PropsIDBRequest extension
no setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- source → dynamic
-
Available on IDBRequest, provided by the PropsIDBRequest extension
no setter - transaction → IDBTransaction?
-
Available on IDBRequest, provided by the PropsIDBRequest extension
no setter
Methods
-
addEventListener(
String type, EventListener? callback, [dynamic options]) → void -
Available on EventTarget, provided by the PropsEventTarget extension
-
dispatchEvent(
Event event) → bool -
Available on EventTarget, provided by the PropsEventTarget extension
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
removeEventListener(
String type, EventListener? callback, [dynamic options]) → void -
Available on EventTarget, provided by the PropsEventTarget extension
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited