JSFiddle - React, Tailwind, and code Playground

HTML

<div id="source" contentEditable="true">
xxx
</div>
<div id="output">

</div>

CSS

#output div {
  border: 1px solid black;
}

JavaScript

source.addEventListener("input", function() {
    var words = this.innerHTML.split(" ");
    output.innerHTML = "";
    words.forEach(function(word, idx) {
        var cword = document.createElement("div");
        cword.innerHTML = word;
        output.appendChild(cword);
    });
});