vue页面嵌套其他页面判断是否生产https

if (location.protocol.indexOf('https') > -1) {
      var oMeta = document.createElement('meta');
      oMeta.content = 'upgrade-insecure-requests';
      oMeta.httpEquiv = 'Content-Security-Policy';
      oMeta.id = 'httpsMeta';
      document.getElementsByTagName('head')[0].appendChild(oMeta);
    }