Example introduction to the difference between JQuery and submit() in JS_jquery

ASP.NET's server control postback uses this piece of JS code:

Copy code The code is as follows:

var theForm = document.forms['form1'];
if (!theForm) {
theForm = document.form1;
}
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit( );
}
}

The problem I encountered today is that I want to assign a value to one of the hidden fields before the server-side control posts back to pass the value to the server.

So I added an event using JQuery’s submit([[data],fn]) method, but found that it didn’t work.

I tried $("form:first").submit() and found that the event function can be triggered.

What’s going on? After checking the information, I found that the native function void submit() of js does not trigger the submit event. This is why there are

in the above code. Copy the code and the code is as follows:

if (< ;span style="color:#006600">!theForm.onsubmit || (theForm.onsubmit() != false)) {
...
}

That’s it.

So write the add event as

Copy the code The code is as follows:

$ ("form:first").get(0).onsubmit = function () {
...
};

That’s it.

In addition, events added using JQuery's submit([[data],fn]) can be triggered using $().submit().