Center child div in a parent div

3 ways to align center child div in parent div

by davidxmartins

HTML

<div class="parent1">
  <div class="child1"></div>
</div>
<hr />
<div class="parent2">
  <div class="child2"></div>
</div>
<hr />
<div class="parent3">
  <div class="child3"></div>
</div>

CSS

/* 1st way */
.parent1 {
  background: darkcyan;
   width: 200px;
   height: 200px;
   position: relative;
}
.child1 {
  background: white;
  height: 30px;
  width: 30px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -15px;
}

/* 2nd way */
.parent2 {
  display: flex;
  justify-content: left;
  align-items: center;
  background: darkcyan;
  height: 200px;
  width: 200px;
}
.child2 {
  background: white;
  height: 30px;
  width: 30px;
}

/* 3rd way */
.parent3 {
  position: relative;
  height: 200px;
  width: 200px;
  background: darkcyan;
}
.child3 {
  background: white;
  height: 30px;
  width: 30px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}