JSFiddle - React, Tailwind, and code Playground

HTML

<div id="firstDiv">
    This is some text
    <span id="firstSpan">First span text</span>
    <span id="secondSpan">Second span text</span>
</div>

JavaScript

var div = document.getElementById('firstDiv'),
    i,
    el;

for (i = 0; i< div.childNodes.length; i++) {
    el = div.childNodes[i];
    console.log(el.nodeType);
    if (el.nodeType === 3) {
        div.removeChild(el);
    }
}