What causes a div with an image inside to not expand the height of its parent div?

I'm puzzled as to why the mainCountainerHeadLogo isn't expanding the parent div, mainCountainerHead, in terms of height.

Interestingly, when I adjust the page scale, both mainCountainerHeadTitle and mainCountainerHeadMenu do expand the mainCountainerHead.

Pardon my English and thanks in advance!

View the code on JSFiddle

* {
  margin: 0;
  padding: 0;
}
html, body {
  height: 100%;
}
.mainCountainer {
  min-height: 100%;
  width: 70%;
  margin: 0 auto;
}
.mainCountainerHead {
  background-color: aqua;
  height: auto;
}
....(CSS code continues)

<div class="mainCountainer">
 <div class="mainCountainerHead">
    ... (HTML code continues)
</div>

htmlcssimage

Answer №1

Regarding your inquiry:

The reason for this issue is due to the float property displacing HTML elements from their usual position on the page, resulting in the behavior you are currently observing. This is akin to using position: absolute, which moves the element to a different layer.

How can this be resolved?

To address this issue, it is necessary to explore alternative methods that do not involve the use of float and instead opt for techniques like Flexbox. However, this may require restructuring your existing code to achieve the desired outcome.

If you provide a layout sketch, I would be able to offer a solution tailored to your specific requirements.

Answer №2

update the CSS code for images as follows:

.headerLogo img {
   width: 100%;
   height: 100%;
   margin: auto
}

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