I want to set a cookie with javascript. Easy enough. Lets say I set it for 15 minutes.

How would I make a count down timer show to show when the cookie expires? And even if they left the page I would want it to keep counting and when they e back to the page it would still have been counting down.

Sorry for the poor explanation. But I'm fairly sure its possile.

Thanks

I want to set a cookie with javascript. Easy enough. Lets say I set it for 15 minutes.

How would I make a count down timer show to show when the cookie expires? And even if they left the page I would want it to keep counting and when they e back to the page it would still have been counting down.

Sorry for the poor explanation. But I'm fairly sure its possile.

Thanks

• javascript
• cookies

1 Answer 1

Store the time stamp of now + 15 minutes within a cookie if there is no cookie. Write a simple script that checks the difference between now and the timestamp every second.

Edit: sample code

// 200 seconds countdown
var countdown = 200; 

//current timestamp
var now   = Date.parse(new Date());

//ready should be stored in your cookie
var ready = Date.parse(new Date (now + countdown  * 1000)); // * 1000 to get ms


//every 1000 ms
setInterval(function()
{
    var sec = ( ready - Date.parse(new Date()) )/1000;
    document.title = sec + " seconds left";

},1000);