如何用JavaScript来检测JSP正在加载到一个插件或浏览器中？

var isFlashLoaded = false;

for (var i = 0; i < navigator.plugins.length; i++) {
  if (navigator.plugins[i].name.indexOf('Shockwave Flash') !== -1) {
    isFlashLoaded = true;
    break;
  }
}

if (isFlashLoaded) {
  console.log('Adobe Flash插件已加载');
} else {
  console.log('Adobe Flash插件未加载');
}

var isPdfPluginLoaded = false;

for (var i = 0; i < navigator.mimeTypes.length; i++) {
  if (navigator.mimeTypes[i].type === 'application/pdf') {
    isPdfPluginLoaded = true;
    break;
  }
}

if (isPdfPluginLoaded) {
  console.log('PDF插件已加载');
} else {
  console.log('PDF插件未加载');
}