jQuery or Js gets the selected value or text

jquery
Get the text value $("#select1 option:selected").text();
Get the value $("#select1 option:selected").val();

js

var obj = document. getElementById(”selectId”); //Location id

var index = obj.selectedIndex; //Select the index
Get the text value
var text = obj.options[index].text; //Select the text
Get the value
var value = obj.options[index].value;