How can I add a box-shadow on one side of an element?

Question

I need to create a box-shadow on some block element, but only (for example) on its right side. The way I do it is to wrap the inner element with box-shado

Answer 1

Here is a codepen to demonstrate for each side, or a working snippet:

.boxes {
  display: flex;
  flex-wrap: wrap;
}

.box {
  margin: 20px;
  border: 1px solid #ccc;
  font-family: Helvetica Neue, Arial, sans-serif;
  font-weight: 100;
  letter-spacing: 2px;
  color: #999;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex: 1;
  padding: 40px;
  line-height: 1.4em;
}

.top {
  box-shadow: 0 -5px 5px -5px #333;
}

.right {
  box-shadow: 5px 0 5px -5px #333;
}

.bottom {
  box-shadow: 0 5px 5px -5px #333;
}

.left {
  box-shadow: -5px 0 5px -5px #333;
}

  
Top Only
  
Right Only
  
Bottom Only
  
Left Only