JSFiddle - React, Tailwind, and code Playground

by SpiceLab

HTML

<div id="login_formular">
        <div id="triangle"></div>
            LAYER-CONTENT
</div>

CSS

body {
    background:#cfcfcf
}
#triangle {
    width: 0;
    border-top: 12x solid transparent;
    border-right: 12px solid transparent;
    border-bottom: 12px solid #f0f0f0;
    border-left: 12px solid transparent;
    margin: 0 auto;
}
#login_formular {
    position: absolute;
    right: 50px;
    top: 20px;
    width: 200px;
    /*display: none;*/
    margin: 0 auto;
    margin-top: 8px;
    margin-bottom: 2%;
    transition: opacity 1s;
    -webkit-transition: opacity 1s;
    text-align:center
}