While reading up on XMLHttpRequest
found out that it is a member of the high level JS global window
object. For instance:
if (window.XMLHttpRequest) { // Mozilla, Safari, IE7+ ...
httpRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE 6 and older
httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
But I can't confirm this information anywhere else? I looked up here https://developer.mozilla.org/en-US/docs/Web/API/Window to see if I could locate the XMLHttpRequest
object but there wasn't any mentioning of it. Am I missing something? Just want to make sure I am understanding the correct origin of XMLHttpRequest
and how it relates to the global window
object.
See the WebIDL definition for the XMLHttpRequest
interface:
[Constructor, Exposed=(Window,DedicatedWorker,SharedWorker)]
interface XMLHttpRequest : XMLHttpRequestEventTarget {
…
}
So that requires XMLHttpRequest
to be exposed from Window
and also from DedicatedWorker
and SharedWorker
(in UAs that actually implement those).