get selected value of dropdown in javascript

JavaScript
var e = document.getElementById("selectElementID");
var value=e.selectElement.options[e.selectedIndex].value;// get selected option value
var text=e.options[e.selectedIndex].text;//get the selected option text <body>
   
   <select id="list" style="padding: 10px;" onchange="getSelectValue();">
     <option value="js">JavaScript</option>
     <option value="php">PHP</option>
     <option value="c#">Csharp</option>
     <option value="java">Java</option>
     <option value="node">Node.js</option>
   </select>
   
    <script>
        function getSelectValue()
        {
            var selectedValue = document.getElementById("list").value;
            alert(selectedValue);
        }
        getSelectValue();
    </script>
 </body>let selectElement = document.getElementById("selectElement");
let valueSelected = selectElement.options[selectElement.selectedIndex].value; // get selected option value
var text= selectElement.options[selectElement.selectedIndex].text; //get the selected option text
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