Jquery is client side but blade is serverside. That means you can add a javascript variable in your blade and use it with jquery. But you can't use jquery to set a blade variable directly.

You can use a GET variable to set a serverside variable and use it in your blade.

I'm a beginner, kindly inform how use GET variable to set a serverside variable and use it in blade

    public function index(Request $request)
    {
        $name = $request->input('name');
        return view('index',['name' => $name]);
    }

Check this code snippet. All your GET variables will be available in $request and can be access as $request->input('variable_name').

Then you can simply pass your server-side variable to your blade file.

As the blade file is just a PHP file, you can directly access the get variable using $_GET['variable_name']