How to create a countdown using moment.js?

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by orpha , in category: Javascript , 3 months ago

How to create a countdown using moment.js?

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1 answer

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by kadin , 2 months ago

@orpha 

To create a countdown using Moment.js, you can follow these steps:

  1. Install Moment.js: Include the Moment.js library in your project by adding the script tag to your HTML file or installing it through a package manager like npm or yarn.
  2. Create HTML elements: Add an HTML element where you want to display the countdown. Assign it an id to reference it in your JavaScript code. For example, .
  3. Write JavaScript code: Import Moment.js at the beginning of your JavaScript file. Use Moment.js to get the current date and time and store it in a variable. Use Moment.js to calculate the target date and time for the countdown (e.g., a future date). Create a function to update the countdown display with the remaining time. Use setInterval() to call this function every second or as frequently as you need. Update the HTML element with the remaining time using its id and innerHTML property.


Here's an example code snippet to help you understand the process:

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<!DOCTYPE html>
<html>
  <head>
    <title>Countdown using Moment.js</title>
    <script src="https://momentjs.com/downloads/moment.min.js"></script>
  </head>
  <body>
    <h1>Countdown</h1>
    <p>Remaining time: <span id="countdown"></span></p>

    <script>
      // Get the current date and time
      var now = moment();

      // Set the target date and time
      var targetDate = moment("2022-01-01 00:00:00");

      // Calculate the remaining time
      var remainingTime = moment.duration(targetDate.diff(now));

      function updateCountdown() {
        // Check if the target date has passed
        if (remainingTime <= 0) {
          document.getElementById("countdown").innerHTML = "Countdown complete!";
        } else {
          // Update the countdown display
          var days = remainingTime.days();
          var hours = remainingTime.hours();
          var minutes = remainingTime.minutes();
          var seconds = remainingTime.seconds();

          document.getElementById("countdown").innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s";

          // Subtract 1 second from the remaining time
          remainingTime.subtract(1, "s");
        }
      }

      // Call the updateCountdown function every second
      setInterval(updateCountdown, 1000);
    </script>
  </body>
</html>


In this example, the countdown is set to the target date of "2022-01-01 00:00:00". The countdown will continuously update the display in the specified HTML element until the target date is reached.