HTML Snippet embedded with Java Script
Even on a static website there is always content that changes regularly and can be loaded from a database or a web service, for example. OpenEndpoints is perfect for converting external content into HTML, which can be seamlessly integrated into your own website.

HTML Sniplets

Build an Endpoint to Return XSLT Transformation. Do not use the download-filename attribute in this case.
The generated HTML is inserted directly into the <div>. Therefore, the HTML (generated with XSLT) should not contain a <head> or <body> tag, but actually only the content that is to be inserted!
Set content-type "text/html" in the transformer:
<transformer data-source="...">
<xslt-file name="..."/>
<content-type type="text/html; charset=utf-8"/>
</transformer>

Load Snippet into Web Page

Java Script can be used to load the html returned from the endpoint into a <div>.
In this example the script was taken from https://www.w3schools.com/lib/w3.js.
<html>
<head>
...
<script>
function includeHTML() {
var z, i, elmnt, file, xhttp;
/* Loop through a collection of all HTML elements: */
z = document.getElementsByTagName("*");
for (i = 0; i < z.length; i++) {
elmnt = z[i];
/*search for elements with a certain atrribute:*/
file = elmnt.getAttribute("w3-include-html");
if (file) {
/* 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");
includeHTML();
}
};
xhttp.open("GET", file, true);
xhttp.send();
/* Exit the function: */
return;
}
}
}
</script>
</head>
<body>
...
<div w3-include-html="[path-to-your-endpoint]"></div>
...
<script>
includeHTML();
</script>
</body>
</html>