JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer part">
    <div class="part icon-part">IKON</div>
    <div class="part text-part">Tekst</div>
    <div class="part arrow-part" >-></div>
    <div class="bottom-button-line">
        </div>
</div>

<br>
    <br>


<button>IKON TEKST</button>

CSS

.part
{
    display: inline-block;
}

.outer
{
    border:1px solid black;
    padding-bottom: 0px;
    padding-top: 5px;
    width: 300px;
    position: relative;
}

.icon-part
{
    padding-left:15px;
}

.text-part
{
    padding-left: 5px;    
}

.arrow-part
{
    position: absolute;
    right: 10px;
    top: -17px;
    opacity: 0;
    transition: all 0.5s ease;
}

.outer:hover .arrow-part
{
    opacity: 1;
    right: 10px;
    top: 7px;
    transition: all 0.5s ease-out;
}

.bottom-button-line
{
    margin-top: 5px;
    height: 5px;
    background-color: blue;
    width: 0px;
    transition: all 0.6s ease;
}

.outer:hover .bottom-button-line
{
    width: 300px;
    transition: all 1s ease-out;
}






button {
    border: 1px solid #000;
    background: 0;
    background-color: #fff;
    font-size: 16px;
    width: 300px;
    font-family: Times Roman;
    text-align: left;
    padding: 0.3em 2.5em 0.63em 1em;
    position: relative;
    transition: all 0.6s ease;    
    overflow: hidden;
}

button:after {
    content: "->";
    font-size: 16px;
    width: 1.5em;
    position: absolute;
    right: 0.3em;
    top: -2.5em;
    transition: all 0.6s ease;    
}

button:before {
    content: "";
    position: absolute;
    height: 0.33em;
    background-color: blue;
    left: 0;
    width: 0;
    bottom: 0;
    transition: all 1s ease; 
}

button:hover:after {
    top: 0.28em;
}

button:hover:before {
    width: 300px;
}