Why is it possible to apply column width to a div element, but not to a button?

This code functions properly and sets the button to a size 4:

<div class="col-xs-4">
    <button class="btn btn-block btn-primary">Like</button>
</div>

However, the following code does not work as expected:

<div>
    <button class="col-xs-4 btn btn-block btn-primary">Like</button>
</div>

This is confusing because I believed that the div tag was simply a container and would apply its styles/ classes to its elements.

Answer №1

col-xs-4 sets the current element's width to around 33% and btn-block makes the current element's width 100%.

Within this code, the parent element's width (div) is 33% (due to col-xs-4) while the child element's width is 100% (because of btn-block).

<div class="col-xs-4">
    <button class="btn btn-block btn-primary">Like</button>
</div>

In the following code snippet, the parent div's display is set to block and its width adjusts based on its content. The child element (Button) has both col-xs-4 and btn-block classes applied, but btn-block overrides the effect of col-xs-4 by setting a width:100%.

<div>
    <button class="col-xs-4 btn btn-block btn-primary">Like</button>
</div>

If you take out the btn-block class, you will notice that col-xs-4 works as intended and sets the width to 33%.

<div>
    <button class="col-xs-4 btn btn-primary">Like</button>
</div>

I have created a demonstration for you.

Answer №2

The div in the first scenario is assigned the class "col-xs-4," meaning its size will remain constant regardless of the content within it.

Conversely, in the second scenario, the div lacks any specific class, resulting in its size adapting based on the content it holds.

The issue with the second example arises from conflicting classes altering the button size. The initial declaration of the "col-xs-4" class is overridden by subsequent class modifications, leading to inconsistency in sizing.

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