JSFiddle - React, Tailwind, and code Playground

by chriscoyier

HTML

<div class="content">
    <a href="#" class="corner-link"></a>
    <div class="corner-text-wrapper">
        <div class="corner-text">
          <span>FREE!</span>
          </div>
    </div>
</div>

CSS

.content {
    border: 1px solid #CCCCCC;
    height: 400px;
    line-height: 400px;
    margin: 50px auto;
    overflow: hidden;
    position: relative;
    width: 80%;
}

.corner-link {
  -webkit-transform: rotate(-45deg);  
     -moz-transform: rotate(-45deg); 
      -ms-transform: rotate(-45deg); 
       -o-transform: rotate(-45deg); 
          transform: rotate(-45deg);
  -webkit-transform-origin: 0 0;
     -moz-transform-origin: 0 0;
      -ms-transform-origin: 0 0;
       -o-transform-origin: 0 0;
          transform-origin: 0 0;
    right: 0;
    top: 0;
    display: block;
    height: 150px;
    position: absolute;
    width: 100px;
    z-index: 3;
}
.corner-text-wrapper {
  -webkit-transform: rotate(45deg);  
     -moz-transform: rotate(45deg);  
      -ms-transform: rotate(45deg);  
       -o-transform: rotate(45deg);  
          transform: rotate(45deg);
    clip: rect(0px, 141.421px, 70.7107px, 0px);
    height: 141.421px;
    position: absolute;
    right: -20.7107px;
    top: -20.7107px;
    width: 141.421px;
    z-index: 1;
}
.corner-text {
  color: white;
 -webkit-transform: rotate(-45deg);  
     -moz-transform: rotate(-45deg); 
      -ms-transform: rotate(-45deg); 
       -o-transform: rotate(-45deg); 
          transform: rotate(-45deg);
    left: 20px;
    top: 20px;
    background-color: blue;
    display: block;
    height: 100px;
    position: absolute;
    width: 100px;
    z-index: 2;
}
.corner-text span {
  position: relative;
  font-family: "HelveticaNeue-CondensedBold", "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  font-weight: 700;
  top: -185px;
  left: 10px;
  display: block;
  text-align: center;
}