Javascript Window Resize Event

JavaScript window resize event

As a tech professional working with JavaScript, you may come across the need to perform certain actions when the window is resized. Whether it’s adjusting the layout, updating content, or triggering animations, handling the window resize event is a common requirement in web development. In this blog post, we will explore different approaches to handle the window resize event using JavaScript.

1. Using the onresize event handler

The simplest way to handle the window resize event is by using the onresize event handler. This event is triggered whenever the window is resized.

Here’s an example code snippet:

window.onresize = function() {
  // Your code here
};

This code assigns an anonymous function to the onresize event handler of the window object. You can replace // Your code here with the actions you want to perform when the window is resized.

2. Debouncing the resize event

When the window is resized, the onresize event can be triggered multiple times in quick succession. This can lead to performance issues if your code performs resource-intensive operations. To mitigate this, you can debounce the resize event, ensuring that your code is only executed after a certain delay since the last resize event.

Here’s an example code snippet using the setTimeout function to debounce the resize event:

let resizeTimeout;

window.onresize = function() {
  clearTimeout(resizeTimeout);
  resizeTimeout = setTimeout(function() {
    // Your code here
  }, 200); // Delay in milliseconds
};

In this code, a timeout is cleared and set again every time the resize event is triggered. The code inside the setTimeout function will only execute after the specified delay (200 milliseconds in this example).

3. Using the resize event with the addEventListener method

Instead of assigning the onresize event handler directly, you can also use the addEventListener method to attach the resize event listener.

Here’s an example code snippet:

window.addEventListener('resize', function() {
  // Your code here
});

This code adds an event listener for the resize event on the window object. The provided function will be executed whenever the window is resized.

By using any of these approaches, you can handle the window resize event effectively in your JavaScript code. Remember to replace // Your code here with the specific actions you want to perform when the window is resized.

Feel free to experiment with these solutions and adapt them to your specific requirements. Happy coding!

Javascript Window Resize Event