JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id="testCase" />
<p>
<span>Default Display type:</span>
<span id="result"></span>
</p>
CSS
span {
color: #666;
vertical-align: middle;
}
#result {
color: red;
font-size: 1.4em;
font-weight: bold;
margin-left: .3em;
}
JavaScript
var input = document.getElementById("testCase");
document.getElementById("result").innerHTML = getComputedStyle(input).getPropertyValue("display");