CSS triangle :before element

a:after {
content: '';
width: 0px;
height: 0px;
border-style: solid;
border-width: 15px 15px 0px 15px;
border-color: #fff transparent transparent transparent;
display: inline-block;
vertical-align: middle;
position: absolute;
bottom: -13px;
left: 0;
right: 0;
margin: 0 auto;

}


You can use UTF-8 Geometric Shapes.

a:before {
  content: '\25B2'
}

in your HTML need a meta charset:

<html>
<head>
<meta charset="utf-8" /> 
...
</head>
</html>

Geometric shapes list: https://www.w3schools.com/charsets/ref_utf_geometric.asp


You need to specify the content property.

For positioning, add position:relative to the parent, and then absolutely position the arrow -15px to the left.

jsFiddle example

.d {
    position:relative;
}

.d:before {
    content:"\A";
    border-style: solid;
    border-width: 10px 15px 10px 0;
    border-color: transparent #dd4397 transparent transparent;
    position: absolute;
    left: -15px;
}

You need content property and some other

.d:before {
  content: '';
  width: 0px;
  height: 0px;
  border-style: solid;
  border-width: 10px 15px 10px 0;
  border-color: transparent #dd4397 transparent transparent;  
  display: inline-block;
  vertical-align: middle;
  margin-right: 5px;
}

Tags:

Html

Css

Css Shapes

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