Creating multiple blocks with a 100% height in HTML

Is it true that a parent element must have a fixed height to use percentage-based height? For example, 500px.

I'm designing a grid with divs arranged hierarchically. The parent has a fixed height of 500px, and the children have percentage heights, each 33.333%. These children then contain their own children, each of which I want to set to a percentage height of 100% of its parent.

Does anyone know a solution for this?

Answer №1

Does anyone have a solution for this issue?

A different approach is to utilize flexbox along with flex-grow to ensure that child elements expand to fill their parent container.

* {margin:0;}
section {
  height: 100vh;
}
section,div {
  display: flex;
  flex-direction: column;
}
div,p {
  flex-grow: 1;
  flex-basis: 0;
}
p {
  background: #eee;
}
div:nth-child(even) p {
  background: #ccc;
}
<section>
  <div>
    <p>text</p>
  </div>
  <div>
    <p>text</p>
  </div>
  <div>
    <p>text</p>
  </div>
</section>

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