https://www.lereveildumidi.fr/media/com_smartform/js/jqueryformsubmit.js?debug003

1$(document).ready(function() {
2    let options = {target:'form',beforeSubmit:formRequest,success:formResponse,dataType:'json',clearForm:true}; 
3    $('form').ajaxForm(options); 
4    
5// pre-submit callback 
6function formRequest(formData, jqForm, options) { 
7    $(formData).each(function(i) {
8        if(this.required && this.value===''){
9            $(this.id).addClass('smsg');
10        }else{
11            $(this.id).removeClass('smsg');
12        }
13    });
14    var queryString = $.param(formData); 
15    return true; 
16} 
17 
18// post-submit callback 
19function formResponse(responseText, statusText, xhr, $form)  { 
20    if(statusText==="success"){
21        $form[0].remove();
22        $('.submitresult').html(responseText.message).css('display', 'block');
23
24        if(responseText.redirection!==0 && responseText.url!==''){
25            var target=responseText.redirection===2?'_self':'_blank';
26            var delay=parseInt(responseText.delay,10);
27            if(delay!==NaN && delay>0){
28                $('.resultdelay').html(delay).css('display', 'block');
29				var refresh = setInterval(function(){
30					$('.resultdelay').html(delay);
31					delay--;
32					if(delay===0){
33						window.open(responseText.url, target);
34						clearInterval(refresh);
35					}
36				}, 1000);
37
38            }
39
40            
41        }
42    }
43}    
44
45$('form').on('keydown','input:not([required]), textarea:not([required])', valueChanged);
46$('form').on('change','select:not([required])', valueChanged);
47    
48});
49
50function valueChanged(){
51    if($(this).val()===''){
52        $(this).removeClass('notempty');
53    }else{
54        $(this).addClass('notempty');
55    }
56}