employing the display flex property triggers the emergence of a lavender border

This is an example of a basic HTML structure:

<section id="teasers">
        <div class="wrapper">
            <a href="">
                <div class="redbox">
                    <h2 class="two-lines uppercaseme lowercaseme">Behind the Scenes<br/>
                        <span class="lowercaseme">A look at studio life</span>
                    </h2> 
                    <div class="clearfix"></div>
               </div>
           </a>
       </div>
</section>

Here is the accompanying CSS code:

.redbox {
    padding: 0 55px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

#teasers h2 {
    float: left;
    margin: 7% 0;
}

An issue can be observed HERE when the screen size is reduced to below 992px.

Essentially, using flex property results in a purple border around the H2 tag within .redbox. If you inspect and remove display: flex in the dev tools, the purple border disappears. Why does this happen?

Is this a common problem and what are the possible solutions for it?

Answer №1

The underscore present is actually the styling of the text-decoration on your block-level link (the enclosing a tag), and it serves a purpose.

This issue pertains to floats, not flexbox. Floats are causing the underline to be hidden. However, because flexbox ignores floats, the underline becomes visible again. If you eliminate the float: left property from your H2 element when the screen size is larger than 992px (where the container is styled as block rather than flex), you will notice the reappearance of the underline.

The puzzling question here is why does the underline vanish when an element is floated? This disappearance may be linked to elements being taken out of the normal flow, similar to what occurs with absolute positioning: https://jsfiddle.net/b5jagc1m/

Answer №2

Uncertain about the flex attribute displaying, but if it's a link you can remove the underline by adding text-decoration: none to the CSS.

Answer №3

Encountering the User Agent Stylesheet can cause some style conflicts.

If you have enclosed the h2 in an anchor element, the entire content becomes a link. By default, visited links are displayed in purple.

To change the color of the underline for visited links, adjust the rule like this:

a:visited { color: red; }

SEE DEMO

Alternatively, if you wish to remove the underline completely:

a { text-decoration: none; }

VIEW DEMO


Why does the underline disappear when display: flex is removed?

Removing display: flex causes the floated child within the flex container to be considered, resulting in the disappearance of the underline. In CSS rules, flexbox ignores floats on children:

3. Flex Containers: the flex and inline-flex display values

  • float and clear have no effect on a flex item, and do not take it out-of-flow.

With the deactivation of the flex container, an inline formatting context resumes, causing the collapsed state of the a element due to the presence of the uncleared floated child (The clearfix div in your code is invalid and doesn't work.). This action removes the underlines but retains the text since it's part of block elements.


References:

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