添加CSS梯形：按钮后

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"><a href="#">Click to Submit</a></div>
<div class="btn3"><a href="#">Click to Submit</a></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>