Handling mousewheel events for child elements and their parent element

Question

Handling mousewheel events for child elements and their parent element

I developed a custom jQuery plugin that replaces the default scrollbar with my own, managing mousewheel and bar dragging events.

The issue arises when I place content containing my custom scrollbar within another content also using my scrollbar. When I scroll using the mousewheel on the child content, it causes the parent content to scroll as well.

This occurs because I attached a mousewheel event listener to both the child and parent elements, resulting in triggering of both event handlers when the mouse moves over them simultaneously.

My dilemma is how to enable scrolling only on the child content without affecting the parent element.

If you have any advice on how to tackle this problem, I would greatly appreciate it. The dragging scrollbar functionality seems to be working fine.

javascript jquery html css mousewheel

Answer 1

Answer №1

To prevent the event from propagating further, you need to stop its propagation. This will ensure that the event does not bubble up the DOM tree and trigger on parent elements.

Check out this link for more information

$('body').on('mousewheel', function (e) {
  alert('Body scroll');
});

$('.child').on('mousewheel', function (e) {
  e.stopPropagation();

  alert('Child scroll only');
});

If you remove the e.stopPropagation(); line, you'll see that both alerts will be triggered.

For more details:

Answer 2

To prevent the event from propagating further, you need to stop its propagation. This will ensure that the event does not bubble up the DOM tree and trigger on parent elements.

Check out this link for more information

$('body').on('mousewheel', function (e) {
  alert('Body scroll');
});

$('.child').on('mousewheel', function (e) {
  e.stopPropagation();

  alert('Child scroll only');
});

If you remove the e.stopPropagation(); line, you'll see that both alerts will be triggered.

For more details:

Handling mousewheel events for child elements and their parent element

Answer №1

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