javascript温度转换器在线工具

使用方法

function convertTemperature () {
  let selectedTemp = document.getElementById("temperature").value;
  
  let enteredTemp = document.getElementById("enteredTemp").value;
  
  // if no value entered clears the text
  if (enteredTemp == "") {
     document.getElementById("result").innerHTML = null;
    return;
  }
  
  // if Celsius selected
  if (selectedTemp == "celsius") {
    let fahr = ((9 * enteredTemp) / 5) +32;
    
    document.getElementById("result").innerHTML = fahr.toFixed(2) + " °F";
   return;
  }
  
  // if Fahrenheit selected
  if (selectedTemp == "fahrenheit") {
    let cel = ((enteredTemp - 32) / 9) * 5;
    
    document.getElementById("result").innerHTML = cel.toFixed(2) + " °C";
   
  }
  
}