Is the Bootstrap Modal Triggering Slider Unnecessarily?

Every time I bring up a modal using bootstrap, an unnecessary slider bar appears on the side.

Could CSS be the culprit behind this issue?

How can I prevent this from happening?

CSS code for the modal

.modal {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  display: none;
  overflow: auto;
  overflow-y: scroll;
}

Answer №1

Whenever I trigger a modal with bootstrap, it always displays a scroll bar on the side. Is there some CSS that might be causing this unwanted behavior?

The culprit may be: overflow-y: scroll;.

Setting scroll as the value instructs the browser to always show a scrollbar, even if it's not necessary.

This setting [scroll] means that content is clipped, and when a user agent has a visible scrolling feature (like a scroll bar), it should be displayed for the box regardless of whether any content is actually clipped. This helps prevent scrollbars from flickering in and out constantly in a dynamic context.

Source

If you remove that property altogether, the previous overflow:auto will automatically add a scrollbar only when necessary.

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