JSFiddle - React, Tailwind, and code Playground

HTML

<Select name="drop" id="drop">
    <option value="1">1</option>
    <option value="2">2</option>
</select>
<input type="button" name="test" id="test" value="test">

JavaScript

$("#test").live("click",function() {
       var myarray = new Array();
        myarray.push($("#drop").val());
        alert(myarray);
});