JavaScript Resize

JavaScript resize event fires when the browser window is resized. It can be useful when you want to detect window resizing and take some action accordingly.

Syntax

window.addEventListener("resize", function(event) {
  // run code when the window is resized
});

Example

window.addEventListener("resize", function(event) {
  console.log("Window has been resized.");
});

Output

When the window is resized, the console will log the message "Window has been resized."

Exaplanation

The resize event is fired whenever the window size changes, either by the user resizing the window or by changes to the device's screen size. The event argument contains information about the event, such as the new height and width of the window.

Use

The resize event is commonly used to dynamically resize elements on a page based on the size of the window. For example, you might want to adjust the size of an image or a video player when the user resizes the window.

Important Points

• The resize event is on the window object, so it can be used anywhere in your code.
• Be careful not to overuse the resize event, as it can slow down your website if too many scripts are running at once.
• Do not rely solely on the resize event to determine the size of elements on your webpage. Always use CSS media queries as well.

Summary

The resize event in JavaScript fires whenever the window is resized. It is commonly used to adjust the size of elements on a webpage based on the size of the window, and can be useful in creating dynamic and responsive layouts.