i have two divs, i want to put the child on top of the parent top, i was trying but the child div got stuck outside, what is the wrong?

.content {
  align-items: center;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  height: 200px;
  min-height: 140px;
  min-width: 140px;
  border: 1px solid;
}

.topcorner {
  width: 42px;
  height: 42px;
  background: red;
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1;
}

<div class="content">
  <div class="topcorner">top</div>
</div>

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

CodePudding user response：

Parent element needs to have position: relative.

Add position: relative to the parent class .content to make the child div inside the parent div.

.content {
  align-items: center;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  height: 200px;
  min-height: 140px;
  min-width: 140px;
  border: 1px solid;
  position: relative; //Add this line
}

.topcorner {
  width: 42px;
  height: 42px;
  background: red;
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1;
}

<div class="content">
  <div class="topcorner">top</div>
</div>

<iframe name="sif2" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>