Bootstrap row class contains margin-left and margin-right which creates problems

Question

I am using Bootstrap 'row' class to align divs one on top of another, which works fine but

.row {    margin-left: -15px;    margin-right: -15px;  } 

What I noticed is that it specifies margin-left and margin-right attributes to be -13px because of which my contents get shifted towards left. so what I have done is added another class as follows :

.row-no-margin {    margin-left: 0px;    margin-right: 0px; }  

This solves the purpose, but I would still like to know if there is any specific reason for 'margin-left: -15px;'. And what is the best approach to solve my problem.

Answer 1

The .row is meant to be used inside a container. Since the container has padding to adjust the negative margin in the .row, grid columns used inside the .row can then adjust to the full width of the container. See the Bootstrap docs: http://getbootstrap.com/css/#grid

Here's an example to illustrate: https://codeply.com/p/zHFaC7JR5K

So, a better solution may for you to place your .row inside a .container or .container-fluid

Answer 2

You can use row-fluid instead of row, then you won't have this problem. (for previous versions of bootstrap)

I am not sure of recent versions 3, any way :

The issue is that the first column should not have half a gutter on the left, and the last should not have half a gutter on the right. Rather than use some sort of .first or .last class on those columns as some grid systems do, they instead set the .row class to have negative margins that match the padding of the columns. This "pulls" the gutters off of the first and last columns, while at the same time making it wider.

For more information on this Why does the bootstrap .row has a default margin-left of -30px?