So they really shouldn't be there.Ī performance issue, you may want to know about is that you are doing a DOM lookup for the counters EVERY second. That variable will be set to the click event on the event handler (and again, is not being used) and will be undefined on setInterval. Then, you have a timer variable as a parameter for the click handler and setInterval but never used. Get rid of one of them (preferably get rid of the inline version). Secondly you are setting the click handler BOTH inline and within the script. The minutes and seconds are probably best passed as parameters and interval should be defined within the scope of function. That way, every time the function is called, a new set of variables is created for its execution. So first thing is to get rid of the three variables at the top and recreate them WITHIN the scope of the function. If you want a reusable timer, you can't hard set the variables it will use. There are few things you're doing that prevent you from expanding the code. Var start = document.getElementById('start') Var minute_text = minutes + (minutes > 1 ? ' minutes' : ' minute') Įl.innerHTML = minute_text + ' ' + seconds + ' ' + second_text + '' Var el = document.getElementById(element) Is there anyone who can easily change this script to a functioning one for two timers?
#Countdown timer javascript codepen how to
Here's the script I'm using, but I don't know how to duplicate the timer and let each timer work independently. timer1 lasts 10 secs and timer2 lasts 20). The timers need to have a start button and both have different timings (i.e. Thank you for reading my blog.Currently working on a project that requires two timers on one page. Thank you for reading, and let's connect! Let me know what you create with this cool piece of code. We now have a countdown timer in JavaScript. I'd advise you to write down one number and calculate it on paper to get a good feel for what's happening. Let's first check if it's not already expired. The difference will now have the difference in milliseconds and our set date. Let's get the current timestamp and the difference between our end date and now. We attach it to a const to be able to unset it if it's no longer needed. Now, of course, we want this to look a bit nicer. Then we have a list with days, hours, minutes, and seconds.ĭefault on 0 in case the date expires. This done div will be used if the timer expires. We will have a title, an intro paragraph, and an empty done div. The big day Nicole & Chris wedding 0 Days 0 Hours 0 Minutes 0 Seconds
Let's start by defining our HTML structure. See the Pen Vanilla JavaScript countdown clock by Chris Bongers ( CodePen. ✅ Converting milliseconds to readable formats.We will be creating an end date, and every second we will check how long away this is. Since I'm getting married next year, let's use that as an example. Ī time ago, we made this cool year loading bar, and this made me think a countdown timer would also be cool.Creating a cool JavaScript countdown timer 14 Nov, 2020
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