I face a strange behaviour with no clue at all on why and how to resolve it. I am new on PHP/Laravel/Ajax so be nice please ^^

My blade form :

```
<form method="post" action="{{ route('postContact') }}" id="id_post_contact">
    @csrf
    <input class="form-control" type="text" name="in_email" placeholder="contact@email.com">
    [...]
    <button class="btn" type="submit">Submit Question</button>
</form>

<div>
    <script>
        $("#id_post_contact").submit(function(e) {
            e.preventDefault();

            var form = $(this);
            var url = form.attr('action');
            var data2Send = form.serialize();

            $.ajax({
                type:'POST',
                url:url,
                headers:{
                    'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content'),
                },
                data:data2Send,
                dataType:'JSON',
                cache:false,
                //contentType:'application/json',
                success: function(data) {
                    alert(data.success);
                }
            });
        });
    </script>
</div>

```

My route :

```
Route::post('/contact', 'BasisController@postContactEmail')->name('postContact');

```

My controller postContactEmail method :

```
public function postContactEmail(Request $req){
    dd(
        $req->ajax(),
        $req->isXmlHttpRequest(),
        $req->all()
    );

    return response()->json(['success' => 'Got Simple Ajax Request.']);
}

```

And for a reason I do ignore, my **$req->ajax()** always return **false**.

I have tried many things before asking my first question here and nothing works, especially that this same code works well till now so I have really no clue at all.

The only different thing is my Laravel version has changed from 5.8 to 6.2.

I dont know why my form does not send data correctly, my header request :

```
Accept  
text/html,application/xhtml+xm…plication/xml;q=0.9,*/*;q=0.8
Accept-Encoding 
gzip, deflate, br
Accept-Language 
fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3
Connection  
keep-alive
Content-Length  
149
Content-Type    
application/x-www-form-urlencoded
Cookie  
__cfduid=da74c7ad6c9ff7514e482…E_OPTINVEST_CONSENT=1; _gat=1
Host    
fake-site.tld
Referer 
https://fake-site.tld/
TE  
Trailers
Upgrade-Insecure-Requests   
1
User-Agent  
Mozilla/5.0 (Windows NT 10.0; …) Gecko/20100101 Firefox/69.0

```

And my header response :

```
cf-cache-status 
DYNAMIC
cf-ray  
5254def1febccdd7-CDG
content-encoding    
br
content-type    
text/html; charset=UTF-8
date    
Sun, 13 Oct 2019 22:50:09 GMT
expect-ct   
max-age=604800, report-uri="ht….com/cdn-cgi/beacon/expect-ct"
server  
cloudflare
vary    
Accept-Encoding
X-Firefox-Spdy  
h2

```

P.S.: my jquery version is 2.2.4 (even with the version 3.4.1, the behaviour is the same, **$req->ajax() will always return false**)