Add shadow to custom shape made with border in CSS - css

Question

Ok, so in HTML I have one div tag with a before and after pseudo elements. This is my CSS:
.divClass{
background: #41423D;
height:30px;
}
.divClass:before{
content: '';
line-height: 0;
font-size: 0;
width: 0;
height: 0;
border-width :15px 7px 15px 7px;
border-color: transparent #41423D #41423D transparent;
border-style:solid;
position: absolute;
top: 0;
left: -14px;
}
.divClass:after{
content: '';
line-height: 0;
font-size: 0;
width: 0;
height: 0;
border-width :15px 7px 15px 7px;
border-color: transparent transparent #41423D #41423D;
border-style:solid;
position: absolute;
top: 0;
right: -14px;
}
So, in design it becomes like this:
___
/ \
Now all I need is a shadow on the before and after pseudo elements which are the 2 triangles on either side of the div. The pseudo elements have 0 width and height so using box-shadow is a little tricky.
I need the shadow along the triangle. So, what can I do?

Answer 1

You can use unicode character : ▲ to make the triangles.
Apply a text shadow on it.
If the shape of the triangle is not what you want you can adjust it with transform: rotate(); or transform: skewX(); or both.
It's a bit tricky and not perfect but it can works :
span {
display: inline-block;
font-size: 70px;
transform: skewX(29.5deg);
color: red;
text-shadow: 2px 2px 4px gray;
}
<span>▲</span>
There are some other possibilities, all describe on a CSS Tricks post, so check it if you want :
https://css-tricks.com/triangle-with-shadow/
If think you can check filter: drop-shadow() too. In case you do not need a support for all the browsers it may works for you...
edit:
According to the css tricks post, can't you do that ?
.triangle-with-shadow {
transform: rotate(-45deg);
width: 100px;
height: 100px;
position: relative;
overflow: hidden;
box-shadow: 0 20px 10px -17px rgba(0, 0, 0, 0.5);
}
.triangle-with-shadow:after {
content: "";
position: absolute;
width: 50px;
height: 50px;
background: #999;
transform: rotate(45deg); /* Prefixes... */
top: 75px;
left: 25px;
box-shadow: -1px -1px 10px -2px rgba(0, 0, 0, 0.5);
}
<div class="triangle-with-shadow"></div>
Another possibility if you just want the shape that you describe is to use the perspective :
.shape {
background: #41423D;
width: 150px;
height: 150px;
margin: 20px auto;
transform-origin:50% 100%;
transform:perspective(100px) rotateX(30deg);
box-shadow: 2px 2px 15px #41423D;
}
<div class="shape"></div>