How to achieve chamfered CSS Border Corners rather than rounded corners?

Question

With the CSS border-radius property I can have a curvy, rounded border corner at the end.

.boxLeft{
    border-right: 1px dashed #333;
    border-bottom: 1px dashed #333;
    border-radius: 0 0 10px 0;
}

.boxRight{
    border-left: 1px dashed #333;
    border-bottom: 1px dashed #333;
    border-radius: 0 0 0 10px;
}

But I want a border corner like the image below. If I have two boxes (Yellow & Pink) meeting each other and I want a harsh corner at the bottom meeting point (dotted corner), what should I do?

Is that possible using CSS?

Answer 1

Here's a way, although it does have some shortcomings, like no borders and it isn't transparent:

.left,
.right {
  width: 100px;
  height: 100px;
  float: left;
  position: relative;
}

.left {
  background: lightpink;
}

.right {
  background: lightblue;
}

.right::after,
.left::after {
  width: 0px;
  height: 0px;
  background: #fff;
  content: '';
  position: absolute;
  bottom: 0;
}

.right::after {
  left: 0;
  border-top: 10px solid lightblue;
  border-right: 10px solid lightblue;
  border-left: 10px solid white;
  border-bottom: 10px solid white;
}

.left::after {
  right: 0;
  border-top: 10px solid lightpink;
  border-right: 10px solid white;
  border-left: 10px solid lightpink;
  border-bottom: 10px solid white;
}

<div class="left"></div>
<div class="right"></div>

RESULT:

Here's a fiddle.