Javascript offsetX property

The offsetX property is a read-only property of the MouseEvent object in JavaScript. It represents the X-coordinate of the mouse pointer’s position relative to the target element (the element that triggered the event) in pixels.

Here’s an example of how to use the offsetX property in an event handler:

document.addEventListener('click', function(event) {
  var offsetX = event.offsetX;
  console.log('X-coordinate relative to the target element:', offsetX);
});

In the example above, we add a click event listener to the document object. When a click event occurs, the event handler function is called, and the MouseEvent object is passed as the event parameter.

Within the event handler, we can access the offsetX property of the MouseEvent object to retrieve the X-coordinate of the mouse pointer relative to the target element. We then log the value to the console.

Note that the offsetX property is only applicable to certain types of events, such as mouse events (click, mousemove, mouseover, etc.), and it is not supported in all browsers. In some cases, you may need to use alternative properties, such as clientX or pageX, to get the X-coordinate of the mouse pointer.