Initial commit

src/lib/assets/load_html.js

@@ -0,0 +1,12 @@
+document.querySelectorAll('.url_insert').forEach(url_insert);
+function url_insert(el) {
+  var url = el.dataset.url;
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+    	el.innerHTML = this.response;
+    }
+  };
+  xhttp.open("GET", url, true);
+  xhttp.send();
+}