I want to submit my search word, but ajax returned 

> 
> Uncaught TypeError: $.ajax is not a function
> 
> 
> 

I use custom script defined here: 

> 
> wp\_enqueue\_script( 'script.js', get\_stylesheet\_directory\_uri().
>  '/assets/js/script.js', array('jquery'), '1.4.1');
> 
> 
> 

In my header I call this scripts:

```
   <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
    <script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
    <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
    <script src="//code.jquery.com/jquery-1.11.1.min.js"></script>

```

my form on home page: 

```
  <form method="" id="submitSearch" action="/">
                        <input type="text" class="form-control" id="searchText" placeholder="Search">
                    <button type="submit" class="btn btn-primary">Submit</button>
                </form>

```

in My JS :

```
$ = jQuery;

 $('#submitSearch').submit(function (evt) {
        evt.preventDefault();

        let data = new FormData();

        console.log("GG");

        $.ajax({
            url: ajaxurl,
            data: data,
            dataType: "html",
            processData: false,
            contentType: false,
            type: "POST",
            success: function (data) {

            }
        });
    });

```

What exactly did I wrong, please?