为什么实时服务器会注入这些 javascript 代码

Question

I'm trying to create grid layout but live-server is injecting these codes in webpage...

// <![CDATA[ <-- For SVG support 
if ('WebSocket' in window) {
  (function() {
    function refreshCSS() {
      var sheets = [].slice.call(document.getElementsByTagName("link"));
      var head = document.getElementsByTagName("head")[0];
      for (var i = 0; i < sheets.length; ++i) {
        var elem = sheets[i];
        head.removeChild(elem);
        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.appendChild(elem);
      }
    }
    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();
    };
    console.log('Live reload enabled.');
  })();
}
// ]]>

How to handle this issue; And why it is happening?

Answer 1

Live server "injects" code in your website to work properly, if you open your html file, you'll see that it is doesn't saved, and is only temporary to when you use the extension