![]() However, Javascript intervals are really useful, when it comes to executing code repeatedly for a certain period of time. Especially with () it might create a bit of chaos, so be careful. Timers and their executed code an be very confusing at times, especially taking into consideration, that said code will execute every time in the specified interval. Please note, that this last code, will be executed every 1000ms, or every second, until the timer reaches below 1. With the else statement, I am reducing the counter by 1, whenever the counter is not below 1. Just in case I reduced the number below 0(maybe by reducing counter by more than 1), I set the timer to display 0 seconds. First off, the clearInterval(interval) method stops the interval, this avoids the counter to reduce below 0. Next I am using an if statement to execute as soon as the counter hits 0. ![]() The first thing I do is display the remaining time, which follows the value I assigned to counter. Here is where I am utilizing the previously created variable “timer”. here goes the function, which will be checked every 1000msįor the content of my interval, I chose following code to be checked every 1000ms: timer.innerHTML = counter + " seconds left" Timer.innerHTML = counter + " seconds left" Now comes the actual Javascript to create the countdown timer: var timer = document.querySelector(".timer") //select timer in HTML Other than that, I am giving it the timer class, which I will utilize later on. Since I am using Bootstrap, I give my h2 tag the class text-center. ![]() In order to code a timer in Javascript, we first of all need to create an HTML element, which displays said timer on my website. How To Create A Countdown Timer In JavaScript (source code) How to create a countdown timer in Javascript ![]()
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