JSFiddle - React, Tailwind, and code Playground

HTML

<div id="log"></div>
<select id="companySelect">
    <option>H</option>
    <option>K</option>
    <option>S</option>
</select>
<a href="javascript:GoClick()">test</a>

JavaScript

var cars = [
    {
      "name": "Tico",
      "company": "H"
    },
    {
      "name": "Morning",
      "company": "K"
    },
    {
      "name": "SM",
      "company": "S"
    },
    {
      "name": "K9",
      "company": "K"
    },
    {
      "name": "Avante",
      "company": "H"
    },
    {
      "name": "Ray",
      "company": "K"
    }
  ];
$(document).ready(function(){
$('#btn').click(function(){
    var _selectedCompany = $('#companySelect').val();
    var _curr = jQuery.grep(cars, function(obj) {
        return obj.company === _selectedCompany;
    }).length;
    $('#log').empty().text(_curr);
});
});

function GoClick()
{
    alert(1);
    var _selectedCompany = $('#companySelect').val();
    var _curr = jQuery.grep(cars, function(obj) {
        return obj.company === _selectedCompany;
    }).length;
    $('#log').empty().text(_curr);    
}