dropDownList.js

"use strict";

const dropDownSensor = document.querySelector("#drop-down--sensor");

const selectSensorFromDropDownList = function () {
  const selectedSensor =
    dropDownSensor.options[dropDownSensor.selectedIndex].value;

  switch (selectedSensor) {
    case "none":
      break;
    case "vorlauf":
      console.log("VORLAUF");
      break;
    case "ruecklauf":
      console.log("RUECKLAUF");
      break;
    case "durchfluss":
      console.log("DURCHFLUSS");
      break;
    case "leistung":
      console.log("LEISTUNG");
      break;
    case "energie":
      console.log("ENERGIE");
      break;
    case "energieVerbr":
      console.log("ENERGIE_VERBR");
      break;
    default:
      console.log("Default case");
  }
};

dropDownSensor.addEventListener("change", selectSensorFromDropDownList);