Javascript form submit waiting till finishes

Question

I have a form with upload

<form action="../upload" method="post" id="upload_form" enctype="multipart/form-data" target="upload_frame" >
        <input name="file" type="file" />
    </form>

and it's submit using javascript form another form submit button

function upload(){
    var uploadForm = document.getElementById('upload_form');

    uploadForm.submit();
    console.log('this should be called when the form finishes upload and respone is committed');

}

please tell if the example is not clear enough

Answer 1

Add an onload handler to your iframe. It will be called after the server responds to the request.

For example:

var uploadFrame = document.getElementsByName('upload_frame')[0];

function handleResponseReceived() {
    console.log('this should be called when the form finishes upload and respone is committed');
}

if (uploadFrame.addEventListener) {
    uploadFrame.addEventListener('load', handleResponseReceived, false);
}
else {
    uploadFrame.attachEvent('onload', handleResponseReceived);
}