jQuery's .on() method combined with the submit event

I've got a problem with .on(). I have multiple form-elements (forms with class="remember"), also I add another one form.remember using AJAX. So, I want it to handle submit event something like:

$('form.remember').on('submit',function(){...})

but form added with AJAX doesn't work with it.

Where is the problem? Is it a bug?

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最佳答案

You need to delegate event to the document level

$(document).on('submit','form.remember',function(){
// code
});

$('form.remember').on('submit' work same as $('form.remember').submit( but when you use $(document).on('submit','form.remember' then it will also work for the DOM added later.

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I had a problem with the same symtoms. In my case, it turned out that my submit function was missing the "return" statement.

For example:

 $("#id_form").on("submit", function(){
//Code: Action (like ajax...)
return false;
})
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The problem here is that the "on" is applied to all elements that exists AT THE TIME. When you create an element dynamically, you need to run the on again:

$('form').on('submit',doFormStuff);


createNewForm();


// re-attach to all forms
$('form').off('submit').on('submit',doFormStuff);

Since forms usually have names or IDs, you can just attach to the new form as well. If I'm creating a lot of dynamic stuff, I'll include a setup or bind function:

function bindItems(){
$('form').off('submit').on('submit',doFormStuff);
$('button').off('click').on('click',doButtonStuff);
}

So then whenever you create something (buttons usually in my case), I just call bindItems to update everything on the page.

createNewButton();
bindItems();

I don't like using 'body' or document elements because with tabs and modals they tend to hang around and do things you don't expect. I always try to be as specific as possible unless its a simple 1 page project.


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