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HTML

              
                
  

  
<div id ="CalculatorSalary">
  
 <h2>Freelance Balance Calculator </h2>

            </div>
 <div id='about'>
   
   <button id="btnShowInstruction">Instructions</button>
   <span id='instructionText'>
     <p></p>
   </span>
</div>

 
 <div id=price> 
    
   <h5>price by hour</h5><input type='number' min='1'step='1'id='balancePerHour'/> 
   
   
   
    <h5> Total</h5>
<div id = 'total'>
  <span id='calculate-price'> </span> USD <span id='total'></span>
  
    <div id=button>
   
   
   
 </div>


 <button id="startTimer">Start</button>
 <button  id ="pausetiming" >Pause</button><br><br>
  
  <span id="timeCounter" />  
    </div>



</div>


    
    





              
            
!

CSS

              
                
#CalculatorSalary{
 background-color:Tomato ;
  font-family:"courier";
  font-size:15px;
 padding:20px;
  color:white;
  text-align:center;
}

#about{
  font-family:"courier";
  background-color:Gainsboro ;
  font-size:15px}

#price{
 padding:15px;
  background-color:Gainsboro ;
  border:solid;
  font-family: "courier";
  font-size:15px
}

#button{ padding:25px;
  font-family:"courier";
  font-size:10px;
  background-color:Gainsboro ;
 
}



              
            
!

JS

              
                var interval;
var totalSeconds;
var balancePerHour;

var hours;
var minutes;
var seconds;
var timeCounterLabel;

//initial script
function init()
{
  totalSeconds = 0;
  document.getElementById('calculate-price').innerHTML = "0.00";
    document.getElementById('startTimer').disabled = false;
    document.getElementById('pausetiming').disabled = true;
  
  document.getElementById("startTimer").addEventListener("click", startCounter);
  document.getElementById("pausetiming").addEventListener("click", stopCounter);
  document.getElementById("btnShowInstruction").addEventListener("click", showInstructions);
  
  timeCounterLabel = document.getElementById("timeCounter");
  timeCounterLabel.innerHTML = "00:00:00";
}

//start calculations
function startCounter()
{
  if (document.getElementById("balancePerHour").value <= 0)
    {
      window.alert("Please add price per hour!");
      return;
    }
    document.getElementById('startTimer').disabled = true;
    document.getElementById('pausetiming').disabled = false;
    balancePerHour = document.getElementById('balancePerHour').value; //You could move this line to calculateBalance
    interval = setInterval(count, 1000);
    //TODO: Maybe it would be a good idea to disable the price per hour input while the counter is running. You could do:
    document.getElementById('balancePerHour').disabled = true;
    
}

//stop calculations
function stopCounter() 
{
    document.getElementById('startTimer').disabled = false;
    document.getElementById('pausetiming').disabled = true;
    clearInterval(interval);
    //document.getElementById('balancePerHour').disabled = false;
}

//update interval
function count ()
{
  totalSeconds++;
  calculateBalance(totalSeconds);
  
 setTime();
};

//calculate current freelance balance
function calculateBalance(secondsPassed)
{
  balance = (balancePerHour/(60*60))*secondsPassed;
  
  document.getElementById('calculate-price').innerHTML = balance.toFixed(2);
}

//show instructions
function showInstructions()
{
  document.getElementById('instructionText').innerHTML = "For anyone working as a freelancer, this project can be useful to calculate your pricing and time spent. Type your price by hour, then click on start to start counting. You can pause and resume timer.";
}

//calculate time passed since start working
function setTime() 
{
  timeCounterLabel.innerHTML = pad(parseInt(totalSeconds / (60*60))) + ":"
                              + pad(parseInt(totalSeconds / 60)) + ":"
                              + pad(totalSeconds % 60);
}

function pad(val)
{
  var valString = val + "";
  if (valString.length < 2)
  {
    return "0" + valString;
  }
  else
  {
    return valString;
  }
}


init();

              
            
!
999px

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