Triangular borders [duplicate] - css

Question

This question already has answers here:
Aligning css arrow boxes
(6 answers)
Closed 8 years ago.
Hello i would like to style the borders of my list element so that the border-top-right and the border-bottom-right meet in a triangular shape with only css.
like so:
or like so:
I want to achieve both of these two shapes using css alone, to maybe alter the borders to that shape, i would like to know if that is possible and how i can go about it. The element in question is a list element.

Answer 1

If you're after that specific shape, you can use the :before and :after pseudo elements
Demo Fiddle (second shape)
HTML
<div></div>
CSS
div {
display:inline-block;
position:relative;
height:30px;
width:50px;
background:Red;
}
div:before, div:after {
content:'';
position:absolute;
display:inline-block;
width: 0;
height: 0;
border-style: solid;
border-width: 15px 0 15px 26.0px;
}
div:after {
border-color: transparent transparent transparent red;
right:-26px;
}
div:before {
border-color: transparent transparent transparent white;
}

Answer 2

code for your shapes:-
#breadcrumbs-two{
overflow: hidden;
width: 100%;
}
#breadcrumbs-two li{
float: left;
margin: 0 .5em 0 1em;
}
#breadcrumbs-two a{
background: #ddd;
padding: .7em 1em;
float: left;
text-decoration: none;
color: #444;
text-shadow: 0 1px 0 rgba(255,255,255,.5);
position: relative;
}
#breadcrumbs-two a:hover{
background: #99db76;
}
#breadcrumbs-two a::before{
content: "";
position: absolute;
top: 50%;
margin-top: -1.5em;
border-width: 1.5em 0 1.5em 1em;
border-style: solid;
border-color: #ddd #ddd #ddd transparent;
left: -1em;
}
#breadcrumbs-two a:hover::before{
border-color: #99db76 #99db76 #99db76 transparent;
}
#breadcrumbs-two a::after{
content: "";
position: absolute;
top: 50%;
margin-top: -1.5em;
border-top: 1.5em solid transparent;
border-bottom: 1.5em solid transparent;
border-left: 1em solid #ddd;
right: -1em;
}
#breadcrumbs-two a:hover::after{
border-left-color: #99db76;
}
#breadcrumbs-two .current,
#breadcrumbs-two .current:hover{
font-weight: bold;
background: none;
}
#breadcrumbs-two .current::after,
#breadcrumbs-two .current::before{
content: normal;
}

Answer 3

DEMO
div {
background: #EF3E36;
margin: 10px;
}
.arrow1 {
position: relative;
left: 50px;
width: 250px; height: 100px;
}
.arrow1:before {
display: block;
content: "";
width: 0;
height: 0;
position: absolute;
left: -50px;
border: 50px solid #EF3E36;
border-left: 50px solid transparent;
border-right: 0;
}
.arrow1:after {
display: block;
content: "";
background: transparent;
width: 0;
height: 0;
position: absolute;
left: 250px;
border: 50px solid transparent;
border-left: 50px solid #EF3E36;
}
.arrow2 {
position: relative;
width: 300px; height: 100px;
}
.arrow2:after {
display: block;
content: "";
background: transparent;
width: 0;
height: 0;
position: absolute;
left: 300px;
border: 50px solid transparent;
border-left: 50px solid #EF3E36;
}