it can not access popup.js file after creating a chrome extension

Question

manifest.json

{
  \"name\": \"Summer\",
  \"version\": \"1.0\",
  \"manifest_version\": 2,
  \"description\": \"This is an addition extensio         


        

Answer 1

You've got manifest_version : 2 in your manifest, so please go read about the changes it introduces....
http://code.google.com/chrome/extensions/manifestVersion.html
You got in the console Refused to execute inline event handler because of Content-Security-Policy, because of the onclick event handler in your html (). With manifest version 2 this isnt allowed, you need to attach the event listner from your js code and not in the html.
Here's a working version of your code....
popup.html

  
    

    
    
  
  
        

            
Sayı 1 :    
 
            
Sayı 2 :    
 
            
Sonuç :     
            

        
  

popup.js

function hesaplama()
{
var sayı1 = window.document.form.deger1.value;
var sayı2 = window.document.form.deger2.value;
var toplam = (parseFloat(sayı1) + parseFloat(sayı2)) ;
window.document.form.cevap.value = toplam;
}
window.onload = function(){
    document.querySelector('input[value="Hesapla"]').onclick=hesaplama;
}