Rows are wrappers for columns.
Bootstrap add gutter between columns.
Bootstrap 4 now has spacing utilities that make adding or substracting the space gutter between columns easier.
Div class row div class text center col md 6 div class mr 2 widget 1 div div div class text center col md 6 div class ml 2 widget 2 div div div.
Predefined classes like row and col sm 4 are available for quickly making grid layouts.
That padding is offset in rows for the first and last column via negative margin on rows.
Each column has horizontal padding called a gutter for controlling the space between them.
Content should be placed within columns and only columns may be immediate children of rows.
No gutter class col padding right.
You also must adjust the negative margin so that spacing around the outer columns is not affected.
The resulting grid gutter width 2 on both sides of the grid will be hide with a negative margin of 15px.
This padding is then counteracted on the rows with negative margins.
In the case of the sm grid your container class will 970px 940px grid gutter width.
Every column get a width of 940 12.
Just add the no gutter class to the row.
Add it to the row div like this.
Every column have a padding of 15 px on both sides.
Gutters let us add padding between columns.
We can use it to space and align content.
100 across all viewport and device sizes.
Div class container px 4 div class row gx 5 div class col div class p 3 border column padding div div div class col div class p 3 border column padding div div div div.
Extra css isn t necessary.
To add a border in the gutter we will change the columns to use margin and padding and also add a left border.
Which makes a gutter between of 30 px.
For example we can write.
Columns create gutters gaps between column content via padding.
Bootstrap 3 3 3 9 gutters are created using padding.