Make div bigger then its parent

Issue

is there any way how can I make div bigger then its parent? I know its bad practice. Basically I have div that is small and I need to create div inside which will be through entire window. But cant find way how to do it. Thanks for any help.

Solution

You need to "pop" that element from normal flow with position rule with specified dimensions. E.g. position: fixed;

.outer {
  width: 10vw;
  height: 10vh;
  position: relative;
  background: rgba(130, 130, 255, .3);
  border: 1px solid red;
}

.inner {
  width: 90vw;
  height: 90vh;
  position: absolute;
  left: 5px;
  top: 5px;
  background: rgba(130, 255, 130, .3);
  border: 1px solid green;
}

<div class="outer">
  <div class="inner"></div>
</div>

---

Alternative

Have overflow: visible with specified dimensions

.outer {
  width: 10vw;
  height: 10vh;
  position: relative;
  background: rgba(130, 130, 255, .3);
  border: 1px solid red;
  overflow: visible;
  display: inline-block;
  vertical-align: top;
}

.inner {
  width: 90vw;
  height: 90vh;
  margin: 5px;
  margin: 5px;
  background: rgba(130, 255, 130, .3);
  border: 1px solid green;
}

<div class="outer">
  <div class="inner"></div>
</div>

Answered By - Justinas