JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
    <div class="modal"></div>
    <div class="header">
        <a href="#">режим работы</a>
    </div>
</div>

CSS

.wrap {
    width:500px;
    margin: 0 auto;
    height:400px;
    background:red;
    position:relative;
}
.header {
    background:green;
    height:50px;
}
.modal {
    background:blue;
    height:200px;
    width:180px;
    position:absolute;
    right:10px;
    top:0;
    -webkit-transition: top 0.5s;
    -moz-transition: top 0.5s;
    -o-transition: top 0.5s;
    transition: top 0.5s
}
.modal.active {
    top:10px;
}

JavaScript

$('a').on('click', function(e){
    e.preventDefault();
    $('.modal').stop(true, true).slideToggle(500);
});