Controller :
   public function newCategory(Request $request) {
        $category = new Category;
        $name = $request->name;
        $url = $request->url;
        $meta = $request->meta;
        $timestamp = date('Y-m-d H:i:s');
        $category->name = $name;
        $category->url = $url;
        $category->meta = $meta;
        $category->created_at = $timestamp;
        $category->updated_at = NULL;
        $addCat = $category->save();
        if($addCat) {
            return response()->json(array('status' => 200, 'message' => array('title' => 'Success', 'msg' => 'Category has been added')));
        } else {
            return response()->json(array('status' => 500, 'message' => array('title' => 'Failed', 'msg' => 'Failed adding Category, Try again later.')));
        }
    }

Routes :

Route::group(['prefix' => 'category'], function(){
    Route::get('/', 'HomeController@category')->name('category');
    Route::get('add', 'HomeController@addCategory');
    Route::post('add/go', 'HomeController@newCategory');
});

Form :

<form method="POST" id="catNew">
                                    @csrf
                                <div class="row">
                                    <div class="col-md-2">
                                        <label for="title">Name:</label>
                                    </div>
                                    <div class="col-md-10">
                                        <input type="text" class="form-control" name="catname" placeholder="Category Name"/>
                                    </div>
                                </div>
                                <div class="row" style="margin-top: 10px;">
                                        <div class="col-md-2">
                                            <label for="title">url:</label>
                                        </div>
                                        <div class="col-md-10">
                                            <input type="text" class="form-control" name="curl"  placeholder="ex: lorem-ipsum"/>
                                        </div>
                                </div>
                                <div class="row" style="margin-top: 10px;">
                                        <div class="col-md-2">
                                            <label for="title">Meta:</label>
                                        </div>
                                        <div class="col-md-10">
                                            <input type="text" class="form-control" name="catmeta" placeholder="The Meta Description"/>
                                        </div>
                                </div>
                                <div class="row" style="margin-top: 10px">
                                    <div class="col-md-12">
                                            <button type="submit" class="btn btn-success" style="margin-left: 20px; margin-right: 10px">Submit</button>
                                            <button onclick="window.location.href='/admin/category';" class="btn btn-danger">Cancel</button>
                                    </div>
                                </div>
                            </form>

Ajax :

<script>
                    $(document).on('submit', '#catNew', function(e) {

                        e.preventDefault();

                        var fd = new FormData($('#catNew')[0]);

                        $.ajax({

                            url: '/admin/category/add/go/',
                            type: 'POST',
                            data: fd,
                            processData: false,
                            contentType: false,
                            dataType: 'json',
                            async: true,
                            error: function(xhr, status, message){
                            console.log(xhr.responseText);
                        }}).done(function(data) {
                            switch(data.status) {

                                case 200:
                                    alertify.success(data.message.title, data.message.msg);
                                    window.location.href = '/admin/category';
                                    break;
                                default:
                                    alert(data.message.title, data.message.msg);
                            }
                        });
                    });
</script>