Adding CSS Trapezoid Shape :After Button - html

Question

I'm attempting to create a button style for a client, and cannot seem to get it working using the after pseudo-class.
<style>
$varBase: 40px;
$imsblue: #012169;
$imsgrey: #012169;
body {
background:grey;
}
.btn {
position: relative;
float: left;
height: $varBase;
font-family: sans-serif;
text-align: center;
line-height: $varBase;
color: white;
white-space: nowrap;
text-transform: uppercase;
background: $imsblue;
&:before {
float: left;
content:"";
width: ($varBase/4);
height: ($varBase/2);
}
&:after {
position: absolute;
content:"";
height: ($varBase/2);
border-left: ($varBase/2) solid $imsblue;
border-bottom: ($varBase/2) solid transparent;
}
a {
color: white;
text-decoration:none;
padding: ($varBase/4) ($varBase/2);
margin-right: -10px;
}
}
.btn3 {
display: inline;
color: white;
background: linear-gradient(135deg, rgba(1,33,105,1) 0%, rgba(1,33,105,1) 93%, rgba(30, 87, 153, 0) 93%, rgba(30, 87, 153, 0) 100%);
outline: 0;
border: 0;
padding: 10px 0px;
a {
color: inherit ;
text-transform: uppercase;
text-decoration:none;
padding: ($varBase/4) $varBase;
}
}
</style>
<div class="btn">Click to Submit</div>
<div class="btn3">Click to Submit</div>
I can get it to show using two DIVs, but I need this to work with just one class. Can someone help me see what I'm doing wrong?
It's supposed to look like this (barring color and size of course):

Answer 1

I believe the key element missing is that you need to include a content:"" in your :after pseudoclass. See the example below.
.btn {
height: 40px;
background: red;
width: 128px;
float:left;
}
.btn:after {
width: 0px;
height: 20px;
border-left: 20px solid red;
border-bottom: 20px solid white;
float:right;
content:"";
}
<div class="btn">Button</div>

Answer 2

This will work - I had to convert your SCSS to CSS, but it's clear enough.
.btn {
height: 40px; width: 200px;
background: red;
position: relative; /* work as container */
}
.btn:after {
content: ''; /* needed */
display: block;
position: absolute; /* position to container */
right: 0; bottom: 0;
border-left: 20px solid red;
border-bottom: 20px solid white;
}
<div class="btn">Button</div>
Unfortunately, you can't have "transparent" overlay, it just wont work. I had to use white for it.

Answer 3

I found a solution that works where the "cut" is transparent. You can use regular background or image background for the button:
http://jsfiddle.net/q45w2f78/
<div class="buttoncut gon">My button</div>
CSS:
.gon {
width: 220px;
height: 220px;
background: darkblue;
background-size: 220px 220px;
/* Text styling */
line-height: 220px;
text-align: center;
font-family: sans-serif;
font-size: 15px;
font-weight: bold;
letter-spacing: 6px;
color: beige;
}
.gon:hover {
color: #fff;
text-shadow: 0 0 10px white;
}
.buttoncut {
height: 200px;
-webkit-clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%); clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%);
-moz-clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%); clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%);
-ms-clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%); clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%);
clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%); clip-path: polygon(0% 0%, 100% 0, 100% 50%, 60% 100%, 0% 100%);
}
I used this generator to get the correct polygon css: http://bennettfeely.com/clippy/

Answer 4

Gradients:
You could use gradients in order to achieve this, and that way you can apply it to any element (this one's done with a button element):
html,body{
background:red;
}
button {
background: -moz-linear-gradient(-45deg, rgba(30, 87, 153, 1) 0%, rgba(30, 87, 153, 1) 89%, rgba(30, 87, 153, 0) 90%, rgba(30, 87, 153, 0) 100%);
/* FF3.6+ */
background: -webkit-gradient(linear, left top, right bottom, color-stop(0%, rgba(30, 87, 153, 1)), color-stop(89%, rgba(30, 87, 153, 1)), color-stop(90%, rgba(30, 87, 153, 0)), color-stop(100%, rgba(30, 87, 153, 0)));
/* Chrome,Safari4+ */
background: -webkit-linear-gradient(-45deg, rgba(30, 87, 153, 1) 0%, rgba(30, 87, 153, 1) 89%, rgba(30, 87, 153, 0) 90%, rgba(30, 87, 153, 0) 100%);
/* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(-45deg, rgba(30, 87, 153, 1) 0%, rgba(30, 87, 153, 1) 89%, rgba(30, 87, 153, 0) 90%, rgba(30, 87, 153, 0) 100%);
/* Opera 11.10+ */
background: -ms-linear-gradient(-45deg, rgba(30, 87, 153, 1) 0%, rgba(30, 87, 153, 1) 89%, rgba(30, 87, 153, 0) 90%, rgba(30, 87, 153, 0) 100%);
/* IE10+ */
background: linear-gradient(135deg, rgba(30, 87, 153, 1) 0%, rgba(30, 87, 153, 1) 89%, rgba(30, 87, 153, 0) 90%, rgba(30, 87, 153, 0) 100%);
/* W3C */
filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#1e5799', endColorstr='#001e5799', GradientType=1);
/* IE6-9 fallback on horizontal gradient */
outline:0;
border:0;
padding:5px;
}
<button>PressMe</button>
Pseudo Element (not great for gradient/image backgrounds)
div {
position: relative;
display:inline-block;
padding:5px;
background:gray;
}
div:after{
content:"";
position:absolute;
border-bottom:10px solid blue;
border-left:10px solid transparent;
bottom:0;
right:0;
}
html,body{
background:blue;
}
<div>Press Me!</div>
Clip Path
button {
padding: 10px;
height: 60px;
width: 60px;
-webkit-clip-path: polygon(0% 0%, 100% 0, 100% 75%, 75% 100%, 0% 100%);
clip-path: polygon(0% 0%, 100% 0, 100% 75%, 75% 100%, 0% 100%);
}
html,body{
background:green;
}
<button>press me!!!</button>
Dynamic length
by using the following snippet, you can make a great button, which isn't affected by length!
button {
position: relative;
border: 0;
outline: 0;
height: 20px;
background: gray;
}
button:after {
position: absolute;
content: "";
right: -10px;
width: 0px;
height: 0px;
bottom: 0;
border-bottom: 10px solid transparent;
border-left: 10px solid gray;
}
button:before {
position: absolute;
content: "";
right: -10px;
width: 10px;
height: 10px;
top: 0;
background: gray;
}
html,
body {
background: red;
}
/*HOVER EFFECTS*/
button:hover,
button:hover:before {
background: yellow;
}
button:hover:after {
border-left: 10px solid yellow;
}
<button>press me and plus i can get really long!</button>