JSFiddle - React, Tailwind, and code Playground

HTML

<div id="testdiv_from">
    <input type="text" id="text1" value="13" />
</div>
<div id="testdiv_to"></div>
<input type="button" />

JavaScript

var btn = document.querySelector("[type=button]");

btn.addEventListener("click", save);

function save() {
    var divTo = document.getElementById("testdiv_to"),
        divFrom = document.getElementById("testdiv_from");

    [].forEach.call(divFrom.childNodes, function (node) {
        divTo.appendChild(node.cloneNode(true));
    });
}