Adding a border to div with top triangle [duplicate]

Question

I'm trying to add a border to div with top triangle

issue is border is not getting applied to the triangle part

body {
  background-color: #F3F5F6;
}
.info-panel {
  display: block;
  position: relative;
  background: #FFFFFF;
  padding: 15px;
  border: 1px solid #DDDDDD;
  margin-top: 20px;
}
.info-panel:after {
  content: '';
  display: block;
  position: absolute;
  left: 20px;
  bottom: 100%;
  width: 0;
  height: 0;
  border-bottom: 10px solid #FFFFFF;
  border-top: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
}

<div class="info-panel">
  Testing
</div>

I dont want to add a css box shadow.

I need a border.

---

jsFiddle

Answer 1

Actually the "triangle part" is a border itself, that's why you can't apply a CSS border to it, However there's a workaround.

use the :before pseudo-element to create another triangle bigger than the first and apply your border color to it.

.info-panel {
  display: block;
  position: relative;
  background: #FFFFFF;
  padding: 15px;
  border: 1px solid #DDDDDD;
  margin-top: 20px;
}
.info-panel:before, .info-panel:after {
  content: '';
  display: block;
  position: absolute;
  bottom: 100%;
  width: 0;
  height: 0;
}
.info-panel:before {
  left: 19px;
  border: 11px solid transparent;
  border-bottom-color: #ddd;
}
.info-panel:after {
  left: 20px;
  border: 10px solid transparent;
  border-bottom-color: #fff;
}

<div class="info-panel">
  Testing
</div>

Answer 2

Just take off this

.info-panel:after {
    border-bottom-color: #FFFFFF;
}

It is overriding border green on it.

check this snippet

.info-panel {
  display: block;
  position: relative;
  background: #FFFFFF;
  padding: 15px;
  border: 1px solid #DDDDDD;
  margin-top: 20px;
}
.info-panel:before {
  border: 1px solid #DDDDDD;
}
.info-panel:after {
  content: '';
  display: block;
  position: absolute;
  left: 20px;
  bottom: 100%;
  width: 0;
  height: 0;
  border-bottom: 10px solid green;
  border-top: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
}

<div class="info-panel">
  Testing
</div>

Hope it helps