Bootstrap5:
Zero gutter is g-0
Boostrap5 comes with gutter utilities
- Catch all dimensions & viewports
g-0..g-5 - Responsive Viewports
g-sm-0..g-lg-5which lets you set the gutter on mobile/desktop - horizontal & vertical modifier
gy-0..gx-5allows for changing gutter in either direction.
A desktop-only vertical gutter would look something like gy-sm-5
Code sample with zero-gutter width:
<div class="container">
<div class="row g-0">
<div class="col-6">
<div class="p-3 border bg-light">...</div>
</div>
<div class="col-6">
<div class="p-3 border bg-light">...</div>
</div>
</div>
</div>