JSFiddle - React, Tailwind, and code Playground

by evan

HTML

<div class="a">
    <div class="config">
        Configuration menu
    </div>
    <div class="b">
        <div class="c">
            In publishing and graphic design, lorem ipsum is a placeholder text commonly used to demonstrate the graphic elements of a document or visual presentation.

        </div>
    </div>
</div>

CSS

.a {
    width: 208px;
    height: 208px;
    border: 1px solid #D5DBE1;
    border-top: 0;
    border-radius: 2px;
    position: absolute;
    top: 15px;
    left: 15px;
    background: #4C98FC;
    overflow: hidden;
}

.b {
    background: white;
    position: absolute;
    top: 2px;
    transition: top .3s;
}

.config {
    position: absolute;
    top: 2px;
    width: 100%;
    text-align: center;
}

.c {
    padding: 22px;
    font-family: Futura;
    font-size: 10pt;
}

JavaScript

$(function () {

    $('.a .b').height(function () {
        return $(this).parent().height() - 2;
    });

    var b = $('.b'),
        a = $('.a');
    var timeout = null;

    a.on('mousemove', function (e) {
        var bgOffsetY = e.pageY - a.offset().top;
        if (bgOffsetY < 60) {
            clearTimeout(timeout);
            timeout = setTimeout(function () {
                if (parseInt(b.css('top')) < 30) {
                    b.css({top: 30});
                }
            }, 600);
        } else {
            b.css({top: 2});
            clearTimeout(timeout);
        }
    });
    
    a.on('mouseleave', function () {
            clearTimeout(timeout);
            b.css({top: 2});
    });
    
});