An example of the difference between submit() in JQuery and JS

This article mainly introduces the difference between JQuery and submit() in JS. Friends who need it can refer to

ASP.NET serverControlPostback is using this piece of JS 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 post back before the server-side control Assign a value to one of the hidden fields 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 is

in the code above. The code is as follows:

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

That’s it.

So write the added event as

The code is as follows:

$("form:first")<span style="color:#006600">.get(0)</span>.onsubmit = function () { 
... 
};

That’s it.

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

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