var z, i, elmnt, file, xhttp;
/* Loop through a collection of all HTML elements: */
z = document.getElementsByTagName("*");
for (i = 0; i < z.length; i++) {
/*search for elements with a certain atrribute:*/
file = elmnt.getAttribute("w3-include-html");
/* Make an HTTP request using the attribute value as the file name: */
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
if (this.readyState == 4) {
if (this.status == 200) {
elmnt.innerHTML = this.responseText;
if (this.status == 404) {
elmnt.innerHTML = "Page not found.";
/* Remove the attribute, and call this function once more: */
elmnt.removeAttribute("w3-include-html");
xhttp.open("GET", file, true);
<div w3-include-html="[path-to-your-endpoint]"></div>