JSFiddle - React, Tailwind, and code Playground

JavaScript

document.getElementById("price_cpu").style.display = "none";
document.getElementById("preview").style.display = "none";
function getpricecpu(){
  var sum_main = document.getElementById("sum_main");
  var maker = document.getElementById("chosenmak");
  var preview = document.getElementById("preview");
  if (maker.selectedIndex == 0 ) {
 document.getElementById("price_cpu").style.display = "none";
 document.getElementById('sum_main').innerHTML = "0.00";
 document.getElementById("preview").style.display = "none",   document.getElementById("preview").src='';
} 
 else {
 var price = maker.options[maker.selectedIndex].getAttribute("data-price")
 document.getElementById('price_cpu').value = price;
 document.getElementById("price_cpu").style.display = "inline-block";
     
 var image = maker.options[maker.selectedIndex].getAttribute("data-image")		    document.getElementById('preview').src = image;
document.getElementById("preview").style.display = "inline-block";
document.getElementById('sum_main').innerHTML = price;
 } 
	    
}