how to get value from dropdown javascript code example

Example 1: javascript to get value of dropdown

var e = document.getElementById("elementId");
var value = e.options[e.selectedIndex].value;
var text = e.options[e.selectedIndex].text;

Example 2: javascript get selected option

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