Vertically center a div inside another div

Question

I\'m trying to vertical-align: middle a div inside another div, but for some reason it\'s not working properly. What am I doing wrong?

Answer 1

You can do it this way:

#wrapper {
  border: 1px solid red;
  width: 500px;
  height: 500px;
}
#block {
  border: 1px solid blue;
  width: 500px;
  height: 250px;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
}

Here a live view: https://jsfiddle.net/w9bpy1t4/