使用JS检测系统服务标签

// 检测操作系统
var userAgent = navigator.userAgent.toLowerCase();
var os = "";
if (userAgent.indexOf("win") >= 0) {
  os = "Windows";
} else if (userAgent.indexOf("mac") >= 0) {
  os = "Mac";
} else if (userAgent.indexOf("linux") >= 0) {
  os = "Linux";
} else if (userAgent.indexOf("android") >= 0) {
  os = "Android";
} else if (userAgent.indexOf("iphone") >= 0 || userAgent.indexOf("ipad") >= 0 || userAgent.indexOf("ipod") >= 0) {
  os = "iOS";
} else {
  os = "Unknown";
}

// 检测浏览器
var browser = "";
if (userAgent.indexOf("msie") >= 0 || userAgent.indexOf("trident") >= 0) {
  browser = "Internet Explorer";
} else if (userAgent.indexOf("edge") >= 0) {
  browser = "Microsoft Edge";
} else if (userAgent.indexOf("chrome") >= 0) {
  browser = "Google Chrome";
} else if (userAgent.indexOf("firefox") >= 0) {
  browser = "Mozilla Firefox";
} else if (userAgent.indexOf("safari") >= 0 && userAgent.indexOf("chrome") < 0) {
  browser = "Apple Safari";
} else if (userAgent.indexOf("opera") >= 0 || userAgent.indexOf("opr") >= 0) {
  browser = "Opera";
} else {
  browser = "Unknown";
}

// 输出系统服务标签信息
console.log("操作系统：" + os);
console.log("浏览器：" + browser);