JSFiddle - React, Tailwind, and code Playground

HTML

<div class="gallery">
    
    <div class="thumbnail">
        <img src="1.jpg" />
    </div>  

    <div class="thumbnail">
        <img src="2.jpg" />
    </div>  
    
    <div class="thumbnail">
        <img src="3.jpg" />
    </div>  
    
    </div>

CSS

.gallery{
    display: flex;
    flex-direction: row;
}

.thumbnail{
    flex: 0 0 100px;
    height: 100px;
    border: solid gray 3px;
}