Remove padding from columns in Bootstrap 3

Question

Problem:

Remove padding/margin to the right and left of col-md-* in Bootstrap 3.

HTML code:

<div class="col-md-12">
    <h2>OntoExplorer<span style="color:#b92429">.</span></h2>

    <div class="col-md-4">
        <div class="widget">
            <div class="widget-header">
                <h3>Dimensions</h3>
            </div>

            <div class="widget-content" id="">
                <div id='jqxWidget'>
                    <div style="clear:both;margin-bottom:20px;" id="listBoxA"></div>
                    <div style="clear:both;" id="listBoxB"></div>

                </div>
            </div>
        </div>
    </div>

    <div class="col-md-8">
        <div class="widget">
            <div class="widget-header">
                <h3>Results</h3>
            </div>

            <div class="widget-content">
                <div id="map_canvas" style="height: 362px;"></div>
            </div>
        </div>
    </div>

</div>

Desired output:

Currently this code adds padding/margin to the right and left of the two columns. I am wondering what it is I am missing in order to remove this extra space on the sides?

Notice:

If I remove "col-md-4" then both columns expand to 100% but I want them to be next to each other.

Answer 1

If you download bootstrap with the SASS files you will be able to edit the config file where there are a setting for the margin of the columns and then save it, in that way the SASS calculates the new width of the columns

Answer 2

Specifically for SASS mixin:

@mixin no-padding($side) {
    @if $side == 'all' {
        .no-padding {
            padding: 0 !important;
        }
    } @else {
        .no-padding-#{$side} {
            padding-#{$side}: 0 !important;
        }
    }
}

@include no-padding("left");
@include no-padding("right");
@include no-padding("top");
@include no-padding("bottom");
@include no-padding("all");

Then in HTML, you can use

.no-padding-left
.no-padding-right
.no-padding-bottom
.no-padding-top
.no-padding - to remove padding from all sides

Sure, you can @include only those declarations, which you need.

Answer 3

Hereafter only available at Bootstrap4

<div class="p-0 m-0">
</div>

note: .p-0 and .m-0 already added bootstrap.css

Answer 4

<div class="col-md-12">
<h2>OntoExplorer<span style="color:#b92429">.</span></h2>

<div class="col-md-4">
    <div class="widget row">
        <div class="widget-header">
            <h3>Dimensions</h3>
        </div>

        <div class="widget-content" id="">
            <div id='jqxWidget'>
                <div style="clear:both;margin-bottom:20px;" id="listBoxA"></div>
                <div style="clear:both;" id="listBoxB"></div>

            </div>
        </div>
    </div>
</div>

<div class="col-md-8">
    <div class="widget row">
        <div class="widget-header">
            <h3>Results</h3>
        </div>

        <div class="widget-content">
            <div id="map_canvas" style="height: 362px;"></div>
        </div>
    </div>
</div>

You can add a class of row to the div inside the col-md-4 and the row's -15px margin will balance out the gutter from the columns. Good explanation here about gutters and rows in Bootstrap 3.

Answer 5

Reducing just the padding on the columns won't make the trick, as you will extend the width of the page, making it uneven with the rest of your page, say navbar. You need to equally reduce the negative margin on the row. Taking @martinedwards' LESS example:

.row-no-padding {
  margin-left: 0;
  margin-right: 0;
  [class*="col-"] {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }
}

Answer 6

Bootstrap 3, since version 3.4.0, has an official way of removing the padding: the class row-no-gutters.

Example from the documentation:

<div class="row row-no-gutters">
  <div class="col-xs-12 col-md-8">.col-xs-12 .col-md-8</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
</div>
<div class="row row-no-gutters">
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
</div>
<div class="row row-no-gutters">
  <div class="col-xs-6">.col-xs-6</div>
  <div class="col-xs-6">.col-xs-6</div>
</div>