JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="vcenter">
        <div class="block"></div>
    </div>
</div>

<br /><br />

<div class="wrapper">
    <div class="vcenter">
        <div class="block"></div>
        <div class="block"></div>
    </div>
</div>

<br /><br />

<div class="wrapper">
    <div class="vcenter">
        <div class="block"></div>
        <div class="block"></div>
        <div class="block"></div>
    </div>
</div>

CSS

.wrapper {
    width:200px;
    height:200px;
    background-color:#0f0;
    text-align:center;
    line-height:200px;
    vertical-align:middle;
}

.vcenter {
    display:inline-block;
    line-height:30px;
    vertical-align:middle;
}

.block {
    width:80px;
    height:30px;
    background-color:#00f;
    display:inline-block;
}