JSFiddle - React, Tailwind, and code Playground

HTML

<div id="gallery-thumbnails">
    <div class="gallery-thumbnail">
        <img src="http://i.imgur.com/ldn4NLl.png"/>
    </div>
    <div class="gallery-thumbnail">
        <img src="http://i.imgur.com/ldn4NLl.png"/>
    </div>
    <div class="gallery-thumbnail">
        <img src="http://i.imgur.com/ldn4NLl.png"/>
    </div>
    <div class="gallery-thumbnail">
        <img src="http://i.imgur.com/ldn4NLl.png"/>
    </div>
    <span class="stretch"></span>
</div>

CSS

#gallery-thumbnails {
    float: left;
    text-align: justify;
    width: 100%;
    margin-top: 10px;
}

#gallery-thumbnails > .stretch {
    width: 100%;
    display: inline-block;
    font-size: 0;
    line-height: 0
}

#galley-thumbnails-container {
    display: inline-block;
    width: 100%;
}

.gallery-thumbnail {
    width: 90px;
    height: 90px;
    border: 2px solid rgba(0, 0, 0, 0.3);
    text-align: center;
    display: inline-block;
    vertical-align: top;
    cursor: pointer;
}

.gallery-thumbnail:hover, .gallery-thumbnail.active {
    border-color: rgba(112, 188, 31, 0.43);
}

.gallery-thumbnail > img {
    max-height: 100%;
    max-width: 100%;
}

JavaScript

var $thumbnailsContainer = $('#gallery-thumbnails');
$thumbnailsContainer.children('*').each(function() {
    $(this).remove();
});

for(var i = 0; i < 5; ++i) {
    var $thumbnail = $('<div>', { class: "gallery-thumbnail" });
    var $thumbnailImage = $('<img />', { src: 'http://i.imgur.com/ldn4NLl.png' });
    $thumbnail.append($thumbnailImage);
    $thumbnailsContainer
        .append($thumbnail)
        .append(' ');
}

$thumbnailsContainer.append($('<span>', { class: 'stretch'} ));