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CSS Bootstrap Basics Responsive Layouts With the Bootstrap Grid Styling Content

PBCS Staff
PBCS Staff
8,522 Points
Posted by PBCS Staff
PBCS Staff
8,522 Points

Why does mb-4 affect the top margin?

At about 1 minute in this lesson, the class mb-4 is added to the h3 elements. Clearly that will add a margin to the bottom. But when the display is refreshed, the h3 elements also shift down, implying the top margin was also changed. What's going on?

1 Answer

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

The "mb-4" class only provides the bottom margin to the headers. But in the same step, the class "pt-4" was added to the "container" div, which is what provides the space at the top for all 3 columns.

This is done starting about 30 seconds in the video.