Refresh the Content without including another file

I have an index.blade.php file. In which I am getting product information with eloquent and showing with a foreach loop. and now I want to refresh the content without including another file. I just want to load the index code with specifying id (#content).

User.php

   public function product()
   {
     return $this->hasMany(Product::class);
   }

index.blade.php

   <button id='bt1'>update</button>
     <div id='content'>
       @foreach(auth()->user()->product as $product)
        <div>$product->name</div>
       @endforeach
  </div>
  <script>
     $('#content').load('/index.blade.php #content');
  </script>

I want to check there is any product added or not. Without refreshing a page.

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