A
DOMRequest
object represents an ongoing operation. It provides callbacks that are called when the operation completes, as well as a reference to the operation's result. A DOM method that initiates an ongoing operation may return a
DOMRequest
object that you can use to monitor the progress of that operation.
DOMRequest.onsuccess
DOMRequest
is completed.
DOMRequest.onerror
A callback handler that gets called when an error occurs while processing the operation.
DOMRequest.readyState
string
indicating whether or not the operation is finished running. Its value is either "done" or "pending".
DOMRequest.result
The operation's result.
DOMRequest.error
Error information, if any.
None.
An example of using the
onsuccess
,
onerror
,
result
，和
error
properties of a
DOMRequest
对象。
var pending = navigator.mozApps.install(manifestUrl);
pending.onsuccess = function () {
// Save the App object that is returned
var appRecord = this.result;
alert('Installation successful!');
};
pending.onerror = function () {
// Display the name of the error
alert('Install failed, error: ' + this.error.name);
};
Not currently part of any specification.