live-server bugfix: refresh CSS and maintain scroll position

injected.html

<!-- Code injected by live-server -->
<script type="text/javascript">
  // <![CDATA[  <-- For SVG support
  if ('WebSocket' in window) {
    (function() {
      function refreshCSS() {
        var sheets = [].slice.call(document.getElementsByTagName("link"));
        var head = document.getElementsByTagName("head")[0];
        let target = sheets.length
        for (var i = 0; i < target; ++i) {
          var elem = (sheets[i]).cloneNode(true);
          var rel = elem.rel;
          if (elem.href && typeof rel != "string" || rel.length == 0 || rel.toLowerCase() == "stylesheet") {
            var url = elem.href.replace(/(&|\?)_cacheOverride=\d+/, '');
            elem.href = url + (url.indexOf('?') >= 0 ? '&' : '?') + '_cacheOverride=' + (new Date().valueOf());
          }
          head.insertAdjacentHTML("beforeend", elem.outerHTML);
          ((i)=>{
            setTimeout(function(){
              head.removeChild(sheets[i]);
            }, 100)          
          })(i)
        }
      }
      var protocol = window.location.protocol === 'http:' ? 'ws://' : 'wss://';
      var address = protocol + window.location.host + window.location.pathname + '/ws';
      var socket = new WebSocket(address);
      socket.onmessage = function(msg) {
        if (msg.data == 'reload') window.location.reload();
        else if (msg.data == 'refreshcss') refreshCSS();
      };
      
    })();
  }
  // ]]>
</script>