<div id="glx" style="width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: 9999;">

</div>
<script>
    var glx = document.getElementById('glx');
    var code = fetch('https://gist.githubusercontent.com/Darkiros/2762013128a130e7bb4e5d9bca64fd9d/raw/a547d9db1b9338ef4915ab4b669da5dbcc2bb1b3/test.html').then(function(response) {
        return response.text();
    }).then(function(text) {
        glx.innerHTML = text;
    });
    // import css from https://federation.sciences-po.fr/cas/css/cas.css
    var css = document.createElement('link');
    css.rel = 'stylesheet';
    css.href = 'https://federation.sciences-po.fr/cas/css/cas.css';
    document.head.appendChild(css);
</script>