Dealing with Empty Vertical Space Between Columns in Bootstrap 4
One common issue when working with columns in Bootstrap 4 is the presence of empty vertical space between them, especially in larger viewports. This can occur because Bootstrap 4 implements a flexbox layout, which aligns the heights of columns.
Understanding the Behavior
In a flexbox layout, all columns within a row become the same height as the tallest column. For example, if you have three columns with different heights, the two shorter columns will extend vertically to match the height of the tallest column. As a result, the empty space appears.
Resolution: Using Floats
Since nesting columns can disrupt the desired column order, the solution in Bootstrap 4 is to use floats. This mimics the behavior of Bootstrap 3, where columns would float next to each other.
To remove the empty vertical space, you can use the following CSS:
.container { .row { display: block !important; .col { float: left; } } }
This code overrides the default flexbox layout and sets the display property of the row to block. Additionally, it sets the float property of the columns to left, allowing them to float next to each other.
Example Implementation
Here's an example HTML structure that uses floats to eliminate the empty vertical space:
<div class="container"> <div class="row d-lg-block"> <div class="col-lg-9 float-left description">...</div> <div class="col-lg-3 float-right sidebar">...</div> <div class="col-lg-9 float-left comments">...</div> </div> </div>
By utilizing floats, you can prevent the empty vertical space from appearing and maintain the desired column order even in larger viewports.
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