<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Include HTML</title>
<style>
div{
margin:50px;
min-height:300px;
background-color: #ccc;
}
</style>
<script src="https://www.w3schools.com/lib/w3.js"></script>
</head>
<body>
<div w3-include-html="page.html"></div>
<script>
w3.includeHTML();
</script>
</body>
</html>
Простой
