Try

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Customer;
use Input;


class CustomerController extends Controller
{

    public function index()
    {
        return view('customer');
    }


    public function autocomplete(Request $request)
    {   
        $term = $request->input('name', '');

        $data = Customer::where('name', 'LIKE', '%' .$term. '%')
        ->select(['name', 'id'])
        ->limit(5)
        ->get()
        ->toArray();

        return response()->json($data);
    }   

 //   public function customer() {
 //    $customer = Customer::all();
 //    return view('customer', array('customer' => $customer ));
    // }
}