bootstrap/site/content/docs/4.6/utilities/visibility.md

layout	title	description	group
docs	Visibility	Control the visibility, without modifying the display, of elements with visibility utilities.	utilities

Set the visibility of elements with our visibility utilities. These utility classes do not modify the display value at all and do not affect layout – .invisible elements still take up space in the page. Content will be hidden both visually and for assistive technology/screen reader users.

Apply .visible or .invisible as needed.

<div class="visible">...</div>
<div class="invisible">...</div>

// Class
.visible {
  visibility: visible !important;
}
.invisible {
  visibility: hidden !important;
}

// Usage as a mixin
// Warning: The `invisible()` mixin has been deprecated as of v4.3.0. It will be removed entirely in v5.
.element {
  @include invisible(visible);
}
.element {
  @include invisible(hidden);
}