Now you can schedule your clock in advance without having to update it by hand. Here’s what that looks like: function getTimeRemaining ( endtime ) ) We then calculate the difference between that time and the current time. We need to write a function that takes a string representing a given end time (as outlined above). The next step is to calculate the time remaining. You can read more about date formatting in JavaScript in this article. For example: const deadline = 'Decem23:59:59 GMT+0200' Or, the long format: const deadline = 'December 31 2015' Įach of these formats allows you to specify an exact time and a time zone (or an offset from UTC in the case of ISO dates). The ISO 8601 format: const deadline = '' This should be a string in any of the formats understood by JavaScript’s Date.parse() method.

Display the clock on the page, and stop the clock when it reaches zero.įirst, you’ll need to set a valid end date.

Output the clock data as a reusable object.

Here’s a quick outline of the steps involved in creating a basic clock: A great little timer that can loops or repeats as many times as you need.

Basic Clock: Count down to a Specific Date or Time Just edit text layers, put your logo into Logo. So, without further ado, here’s how to make your own countdown clock in a mere 18 lines of JavaScript.įor in-depth JavaScript knowledge, read our book, JavaScript: Novice to Ninja, 2nd Edition.

You will have built the clock to behave exactly the way you want it to (rather than trying to bend a plugin to your will). You won’t need to load external scripts and stylesheets. Your code will be lightweight because it will have zero dependencies.While there are many great clock plugins, here are the benefits you’ll get from using raw JavaScript: You can build a clock in raw JavaScript rather than reaching for the nearest plugin. You may have an event, a sale, a promotion, or a game. Sometimes, you’re going to need to build a JavaScript countdown clock.

Text a countdown clock