Bootrap 4 to Bootstrap 5 Upgrade

I extensively use Bootstrap on web sites that I develop, and recently had to upgrade a site from Bootstrap 4 to Bootstrap 5.

This process is a bit tedious, so I thought I would document it for posterity. This is not a complete guide—just a list of changes that affected my site, but I hope this checklist will help others.

• Change "form-group" to "mb-3".
• Change "form-row" to "row".
• Change "form-inline" to "d-flex flex-row align-items-center flex-wrap".
• If using grids, remove "form-control".
• Add "form-label" (everywhere?).
• Change all "data-toggle" to "data-bs-toggle", and "data-target" to "data-bs-target". There are some other "data-xx" cases where you must add the "-bs" qualifier.
• Change "close button "class='close'" to "class='btn-close'".
• Change "text-left" and "text-right" to "text-start" and "text-end".
• Change "float-left" and "float-right" to "float-start" and "float-end".