bootstrap rules code example
Example 1: bootstrap screen sizes
The Bootstrap grid system has four classes:
xs (for phones - screens less than 768px wide)
sm (for tablets - screens equal to or greater than 768px wide)
md (for small laptops - screens equal to or greater than 992px wide)
lg (for laptops and desktops - screens equal to or greater than 1200px wide)
Example 2: bootstrap grid class
col-12 col-sm-4 col-md-3 col-lg-12 col-xl-12