Differences Between Bootstrap 3 & 4
Component Bootstrap 3 Bootstrap 4 Global Source CSS Files LESS SCSS Primary CSS Unit px rem Media Queries Unit px px Global Font Size 14px 16px Default Fonts Helvetica Neue, Helvetica, Arial, sans-serif Uses a "native font stack" (user's system fonts), with a fallback to Helvetica Neue, Arial, and sans-serif Grids Grid Tiers 4 tier grid system (xs, sm, md, lg) 5 tier grid system (xs, sm, md, lg, xl). Bootstrap 4 has removed the xs from the lowest break point. Therefore, col-* covers all devices (no need to specify the size in this case). Offsetting Columns Uses col-*-offset-* classes to offset co...