JSFiddle - React, Tailwind, and code Playground

HTML

<div id="edit" contenteditable="true">
    <span>text</span>   
    <span>text</span> 
    //and more spans maybe 
     <div>
        <br>
     </div>
</div>

JavaScript

var $edit = document.getElementById("edit")
//credit to Douglas Crockford for this
 function walkTheDOM(node, func) {
    func(node);
    node = node.firstChild;
    while (node) {
        walkTheDOM(node, func);
        node = node.nextSibling;
    }
}
walkTheDOM($edit, function (node) {
    if (node.nodeName.toLowerCase()==="div") {
        if(node.innerHTML.trim() === "<br>"){
           console.log("GOT",node);
        }
    }
});