JSFiddle - React, Tailwind, and code Playground

HTML

<div class="portfolioImage">
        <div class="image" style="width: 100%; height: 100%; background-image: url('http://placekitten.com/200/150');"></div>
		<div class="footerBar">A Sample Image</div>
</div>

CSS

.portfolioImage {
    width: 200px;
    height: 150px;
    position: relative;
    -webkit-transition: all 0.3s ease;
    -moz-transition:    all 0.3s ease;
    -o-transition:      all 0.3s ease;
    ms-transition:     all 0.3s ease;
    transition:         all 0.3s ease; 
    opacity: 1.0;
    z-index: 3;
}
.image:hover{
    filter: alpha(opacity=70);
	-moz-opacity: 0.7;
	-khtml-opacity: 0.7;
	opacity: 0.7;
}
.footerBar {
    position: absolute;
    top: 50%;
    left: 25%;
    display: none;
    text-align:center;
    color:#000;
}

JavaScript

$('.portfolioImage').hover(function(){
    $('.footerBar').show();
}, 
    function() {
        $('.footerBar').hide();
    }
);