JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#back"><span></span>back</a>

CSS

a {
    display: block;
    position: relative;  
    height: 26px; 
    width: 45px; 
    color: #fff;
    background-image: -webkit-linear-gradient(top, #444444, #999999);
    -webkit-border-radius: 5px;
    text-decoration:none;
    text-align: center;
    line-height: 1.7em;
    margin: 0 0 0 10px;
}

a span {
    z-index: -1;
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    background: #000;
    position: absolute;
    -webkit-transform: rotate(45deg);      
    top: 4px;
    left: -7px;
    color: transparent;
    -webkit-border-radius: 3px;
}

a span:after{
    content: "hallo";
-webkit-transform: skew(15deg);
    display: block; 
    width: 15px; 
    height: 16px; 
    background: -webkit-gradient(linear, left top, right bottom, from(#9fb3cc), to(#5b80ab), color-stop(0.5, #6b8bb2), color-stop(0.51, #597eaa));   
    -webkit-border-radius: 1px; 
    border: 1px solid rgba(0,0,0, 0.4); 
    border-right: 0; 
    border-top: 0;
    -webkit-box-shadow: 0 1px 0 rgba(255,255,255, 0.25);
}