JSFiddle - React, Tailwind, and code Playground

HTML

<div class="page-content">
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content <br/>
        Post content <br/>
    </div>
    <div class="post">
        Post content
    </div>
</div>

CSS

.page-content {
    column-gap: 5px;
    -moz-column-gap: 5px;
    -webkit-column-gap: 5px;
    column-width: 240px;
    -moz-column-width: 240px;
    -webkit-column-width: 240px;
    height: 300px;
}

.page-content .post {
    width: 235px;
    min-height: 30px;
    padding-right: 5px;
    margin: 10px 5px 0 5px;
    column-span: 1;
    -moz-column-span: 1;
    -webkit-column-span: 1;
    background: #DDD;
    border: solid 1px #AAA;
    display: inline-block;
}