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How do you add 1 every second?

I tried everything, I can not do this !!! Here is my code, please help:

<!DOCTYPE html>
    <html>
         <head>
              <link rel="shortcut icon" href="favicon.ico"/>
              <title>Doughtnut Box !</title>
              <!--Design-->
              <style>

              </style>
              <!--jQuery and Javascript-->
              <script>
                 var doughnut = 0;
                   window.setInterval(
                        doughnut + 1
                   ,1000);
                   document.getElementById("doughnuts").innerHTML="You have " + doughnut >+ " doughnuts!";
              </script>
         </head>
         <body>
              <h3 id="doughnuts"></h3>
         </body></html>

Thanks for the code, it was really great! Now, how can I save it so that it does not start when updating?

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5 answers

Put them in a function. Also, change the expression to assignment .

<script>
     var doughnut = 0;
     window.setInterval(
     function () {
         doughnut = doughnut + 1;
         document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";

     }, 1000);
</script>

Runnable demo below:

var doughnut = 0;
window.setInterval(function () {
  doughnut = doughnut + 1;
  document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}, 1000);
<div id="doughnuts"></div>
Run codeHide result
+8
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setIntervalaccepts a function or cited code. Try the following:

<script>
var doughnut = 0;
window.setInterval(function(){
    doughnut++;
    document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}, 1000);
</script>
+2
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:

var doughnut = 0;
window.setInterval( 
function()
{
    document.getElementById("doughnuts").innerHTML="You have " + ++doughnut + " doughnuts!";
 }
                   ,1000);
+1

:

DEMO .

var doughnut = 0;
//show 0 for the first time
show_value();
//start counter
setInterval(function(){
    doughnut += 1;
    show_value();        
}, 1000);
function show_value(){
    document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}
+1

.

, .

var doughnut = 0;

function show_value()
{
    document.getElementById("doughnuts").innerHTML = "You have " + doughnut++ + " doughnuts!";
    setTimeout(show_value, 1000);
}

show_value();
+1

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