E = e | window. event in js

E = e | window. event is js compatible with IE and non-IE in event processing. Let's take a look at the following simple Syntax: window. onload = function (e) {v

E = e | window. event is js compatible with IE and non-IE in event processing. Let's look at the following simple statement:

Window. onload = function (e) {var div1 = document. getElementById ("div1"); div1.onclick = function (e) {alert (e); // IE6/7/8 does not support parameter input e as undefined }};

[Object MouseEvent] is displayed in IE8 + or non-IE. Therefore, to be compatible with obtaining event-related handles, write var e = e | window. event